The following are tables of hardy flowering trees and shrubs, and comprise only species and varieties suitable, unless otherwise stated, for almost all parts of the British Isles. An asterisk (*) denotes those of the first importance. This way has been adopted to compress as much information as possible into a small space.

Name.Country or Origin and Natural Order.Colour and Season.General Remarks.
Æsculus (Pavia), Horse Chestnut, Buck-eyeSapindaceæ A well-known group represented most largely by the Horse Chestnut, which is the tallest of the species. The Æsculi generally are of medium size, and not very particular about soil or position. The smaller growers were at one time placed in a distinct genus, Pavia, but now placed with Æsculus. The more shrubby species are welcome in the garden, where the Horse Chestnut would be out of place.
*Æ. carneaHybrid between Æ. Hippocastanum and Æ. Pavia. Synonymous with Æ. rubicundaBright red; late May and early JuneThis is a handsome tree for the garden, and is generally about 15 feet high in Britain. Its chief charm is in the profusion and brilliant red colouring of the flower-spikes. It is not of quick growth, but flowers when very young. It will be found in many lists under the name of Æ. rubicunda, the red Horse Chestnut. Rosea is a good variety recommended by Mr. Anthony Waterer as a "tree for planting in smoky districts." Another fine variety, peculiarly bright in flower colouring, is Æ. Brioti.
Æ. flavaA native of Carolina and Virginia, on mountain slopes; introduced in 1764. Sanguinea has red flowers.Pale yellowThose who want a tree in this family of distinct colour will find pleasure probably in this, but its colouring is dull, and the flowers are not plentiful.
*Æ. Hippocastanum (Common Horse Chestnut)From the mountains of Greece. Gerard mentions the Horse Chestnut in his "Herbal" in 1579 as a rare foreign treeWhite; late May or early June. There is considerable variation, as many of the trees in parks and gardens have been raised from seedThe common Horse Chestnut is too well known to describe. It is not a tree for very exposed places, as its large leaves offer considerable resistance to the wind, and get torn and unsightly. The double variety (flore-pleno) is very distinct, having quite double flowers. Foliis aureis variegatis is a variegated variety, as the name suggests, with blotches of yellow on the leaves; and laciniata has cut foliage.
Æ. indicaNepaul, and other parts of Northern India. On the Himalaya the tree reaches a height of 70 feet, with a trunk 3 feet throughWhite, with yellow and red blotches at the base of the petals; SummerThis distinct and beautiful tree is perhaps the rarest of the Horse Chestnuts in cultivation, and is not so robust as the common species. It flowered in England as long ago as 1858 at Mildenhall in Suffolk, but has been little heard of. It is a tree doubtless for the Cornish and Devonshire and southern coast gardens where the Himalayan Rhododendrons thrive well. Sir Joseph Hooker, during his Himalaya travels fifty years ago, saw it loaded with its white racemes, and equal in beauty to the common Horse Chestnut of English parks. Its foliage is quite distinct from that of the other species, the leaflets numbering seven or nine, and being of a dark glossy green. In the other Horse Chestnuts the leaflets are usually only five to each leaf, and never more than seven. The racemes of this Indian species are about 8 inches long, the flowers being white, with blotches of yellow and red at the base of the petals.
*Æ. (Pavia) parvifloraNorth America. On river banks in Georgia. Introduced to England by Mr. John Fraser in 1786White fragrant flowers sometimes tinged with pink, and long stamens, and in long upright racemesThis is better known as P. macrostachya, and is a low, spreading shrub 8 to 10 feet high; the leaves consist of five to seven finely serrated leaflets, covered underneath with a whitish tomentum. Although introduced so long ago, this August flowering shrub is not common; it is a good shrub for a small garden, and is not fastidious about soil or even situation if not too shady. It is increased by suckers thrown up around the plant. These, when detached with a portion of root, soon form good plants.
Æ. californicaCalifornia. 40 feet in its native country, but not much more than a shrub hereErect spikes of white or delicate rose; sweet-smelling flowers; MayThis is not much known, but is a handsome shrub or tree.
*Æ. Pavia (P. rubra)North AmericaRed; early summerThis is the Red Buck-eye, and will grow 15 feet high, but is more often simply a big shrub. The flowers are very bright red in colour, and in loose clusters, unlike the dense spikes of the common Horse Chestnut. The varieties are even dwarfer. Humilis, for instance, is only 4 feet. Atrosanguinea has very dark red flowers, and those of whitleyana are brighter than the type.
Æ. turbinataJapan (introduced by Messrs. Veitch & Sons)Yellowish white, not so large as those of the common Horse ChestnutAs this has not yet flowered in this country, as far as we are aware, but will probably become popular here, the following account of it by Professor Sargent in his "Forest Flora of Japan" will be interesting:—"This, however, is a noble tree—one of the largest and stateliest of all the horse chestnuts. In the forests of the interior mountain regions of Central Hondo, at elevations between 2000 and 3000 feet, horse chestnuts 80 to 100 feet tall, with trunks 3 or 4 feet in diameter, are not uncommon. These were, perhaps, the largest deciduous trees on the main island growing naturally in the forest—that is, which had not been planted by men—and their escape from destruction was probably due to their inaccessible position, and to the fact that the wood of the horse chestnut is not particularly valued by the Japanese. In habit, and in the form, venation, and colouring of the leaves, the Japanese horse chestnut resembles the horse chestnut of our gardens, the Grecian Æsculus Hippocastanum, and at first sight it might easily be mistaken for that tree, but the thyrsus of flowers of the Japanese species, which is 10 or 12 inches long, and only 2½ to 3 inches broad, is more slender; the flowers are smaller, and pale yellow, with short, nearly equal, petals, ciliate on the margins; and the fruit is that of the Pavias, being smooth, and showing no trace of the prickles which distinguish the true horse chestnuts. The Japanese horse chestnut reaches Southern Yezo, finding its most northern home near Mororan, on the shores of Volcano Bay, at the level of the ocean; it is generally distributed through the mountainous parts of the three southern islands, sometimes ascending in the south to an elevation of 4000 or 5000 feet. There seems no reason why this tree, which has already produced fruit in France, should not flourish in our northern states, where, as well as in Europe, it is still little known. In Northern Japan the fruits are exposed for sale in the shops, although they are probably used only as playthings for the children."

HORSE-CHESTNUT (Æsculus Hippocastanum) IN FLOWER.

Name.Country or Origin and Natural Order.Colour and Season.General Remarks.
AmelanchierRosaceæ A charming family of spring-flowering trees, graceful in growth, and of moderate stature. There are four species, but dozens of names in catalogues; in fact, the genus is much mixed up in many books and lists.
*A. alnifoliaNorth-West AmericaWhite; SpringThis is usually about 8 feet high; it is very beautiful with its wealth of white flowers in compact clusters or racemes, followed by purple berries. In the Kew "Arboretum" Hand-list no less than ten synonyms are given.
*A. canadensisCanadaWhite; AprilThis flowers about a month before A. alnifolia, and is one of the first trees to greet us with its wealth of snow-white blossom in spring. It should be planted in a free group. Juneberry and Snowy Mespilus are its popular names. Eighteen synonyms are given in the list referred to, the most usual being A. Botryapium. No small garden should be without this lovely small tree; it is between 6 and 8 feet high, spreading, and has purplish fruits, whilst the leaves die off deep golden yellow, so that the Snowy Mespilus has many beautiful phases. There are several varieties, but the species is as beautiful as any.
A. oligocarpaNorthern United States, and found in bogs and swampsWhite; April and MayThis is quite a dwarf shrub, 3 feet to 4 feet, and the individual flowers are ¾ inch across. As it is found in moist places it should be tried in such positions in Britain.
A. vulgarisEuropeWhite; AprilThis has been in English gardens about 300 years. It is like the Canadian Juneberry or Snowy Mespilus, but not so beautiful. If only one Amelanchier is required, choose A. canadensis.
*Andromeda polifolia (Moorwort)Ericaceæ; widely distributed.Pink; SummerA small shrub about a foot high, with pretty pink wax-like flowers in summer. Moist, peaty soil. See Cassandra, Leucothoë, Cassiope, Lyonia, Oxydendron, Pieris, and Zenobia.
*Berberis acuminataBerberideæ; ChinaBronzy yellowEvergreen shrub with red young wood. Introduced by Messrs. Veitch.
*B. Aquifolium (Ash Barberry, Syn. Mahonia Aquifolium)Introduced 1823. Spread widely over the western side of North America from Nootka Sound southwards.Yellow; early Spring, dark green leaves of Summer have a purplish tinge after frostA common, but handsome evergreen shrub, reaching a clothed height of 3 to 5 feet, and with dark green pinnate and leathery leaves. The flowers are bright golden; they are succeeded by berries, purple when ripe, which add to the ornamental features of the plant. It is one of the best shrubs for growing under trees, and in many places is planted for game cover. Distinct varieties are fascicularis, which is usually 2 feet to 4 feet high and has narrower leaflets of a duller green than the type.
*B. buxifolia (Box-leaved Barberry, Syn. B. dulcis)ChiliYellow; April and early MayAn upright evergreen bush 5 feet high, clothed with small box-like leaves, and bearing drooping blossoms borne on unusually long stalks. It is not so handsome as B. Darwinii or B. stenophylla, but flowering before them is on that account valuable. A dwarf variety (nana) is a pretty rock-work plant.
B. concinnaHimalayaPale yellowA little deciduous shrub not more than 18 inches high, and with silvery undersides to the leaves. It needs a sheltered spot in good soil.
B. congestiflora var. hakeoidesChiliBright yellowA large interesting bush, with masses of flowers. Rare.
B. aristataHimalayaYellowA strong-growing deciduous shrub, somewhat after the style of the common Barberry, but chiefly remarkable from the bright red of the young bark, which thus forms a fine winter feature.
*B. Darwinii (Darwin's Barberry)ChiliOrange yellow; MayThis ranks with B. stenophylla as the most handsome of all Barberries; and, indeed, it is in the very front rank of flowering shrubs. It is of bold, wide-spreading growth 6 to 8 feet high, and the masses of dark evergreen leaves serve admirably as a setting to the clusters of orange-coloured blossoms which are at their best in May. The purple berries are very attractive towards the end of the summer. This Barberry forms a delightful lawn shrub, particularly in a fairly moist soil.
B. empetrifoliaChiliYellow; SpringA little evergreen bush less than 2 feet high, and flowering about the same time as B. Darwinii. With this just-named species it shares the parentage of B. stenophylla, which is unsurpassed in the entire genus.
B. nepalensis, Syn. Mahonia nepalensisNepaulYellowThe stateliest of the Ash Barberries, forming a specimen 6 feet high, and regularly furnished with long compound leaves. It is, however, tender, except in the West of England and Ireland, where, in a moist, fairly open soil, it does well. Even there a sheltered spot should be chosen for it.
B. repens, Syn. Mahonia repensNorth America ,,Related to B. Aquifolium, and, like that, will do well in shady spots. It is dwarfer than the other just mentioned.
*B. stenophyllaGarden formYellow; SpringThis is a hybrid between B. Darwinii and B. empetrifolia, and a shrub of rare beauty. The slender arching shoots are very graceful, and during the flowering period are completely wreathed with golden blossoms. Standing singly on a lawn, or near water, it is delightful. It should be in the smallest collection of flowering shrubs.
*B. ThunbergiChina and JapanPale yellow and red; SpringA spreading shrub 3 or 4 feet high, with flowers not particularly showy, and borne on the undersides of the shoots just as the young leaves are expanding. The bright-red berries are very showy, but they are surpassed by the brilliant scarlet of the decaying leaves.
*B. vulgaris (Common Barberry)EuropeYellow; SpringThe common Barberry is an ornamental deciduous shrub 8 to 10 feet high, and is valuable from the fact that it will thrive in dry, stony soils. Apart from the pale-yellow flowers in spring, the scarlet berries are very showy, and by some are used for preserves. There are many varieties, the best being the purple-leaved (purpurea) and white-fruited (fructu albo).
B. wallichiana (Syn. B. Jamesoni, B. Hookerii)Himalaya and ChinaSulphur Yellow; JuneA dense evergreen bush, with dark green spiny leaves and pale yellow blossoms. It grows 4 or 5 feet high.
*B. WilsonæChinaRich golden colourA fine shrub, the leaves changing to an intense crimson colour in autumn. Spines an inch long.
Name.Country or Origin and Natural Order.Colour and Season.General Remarks.
*Buddleia ColvilleiHimalaya; LoganiaceæRosy crimson; JuneA beautiful tree, reaching a height of 30 feet in its native country, but it is hardy only in the extreme West.
*B. globosa (Orange Ball tree)ChiliOrange yellow; MidsummerA deciduous shrub, 10 to 12 feet high, with long, willow-like hoary leaves, and flowers borne in globular clusters about midsummer. It is perfectly hardy in warm soils in the South of England, and is much admired.
B. japonica, Syn. B. curvifloraJapanLilac; AugustThis has several well-marked features, forming as it does a deciduous shrub about 4 feet high, with curiously winged stems and long curved spikes of blossoms.
B. variabilisChinaRosy purple, Yellowish throat; MidsummerA free-growing shrub, 6 to 8 feet high. The variety Magnifica was introduced by Messrs. Veitch from Central China; rich rose purple. Prune well back each autumn. Veitchiana is lighter in colour and flowers a fortnight sooner.
Cæsalpinia japonicaJapan; LeguminosæCanary yellow; SummerA very interesting shrub, rambling and with long flexible shoots with red prickles. The leaves are a foot long, and of a pleasing green; the flowers, which are in partially erect racemes, are about 1 inch across, and bright canary yellow in colour, against which the reddish anthers are conspicuous. It must not be planted where it is likely to get smothered. It has stood out unharmed for many years in the Coombewood Nursery (Kingston).
*Calycanthus floridus (American Allspice)North America; CalycanthaceæPurplish red; JulyA deciduous, much-branched shrub from 5 to 6 feet high, well worth growing for its highly fragrant flowers, about a couple of inches in diameter. It needs a fairly cool, moist soil.
C. occidentalis (Californian Allspice)CaliforniaCrimsonMuch like the preceding, but of more vigorous growth with larger flowers.
Cassandra calyculata (Syn. Andromeda calyculata)North AmericaWhite; April and MayAn evergreen under-shrub, growing from 1 to 2 feet high. The shoots are arching, and the waxy Lily-of-the-Valley-like flowers are suspended from the undersides in considerable numbers. It is a pretty but by no means showy shrub, and needs moist, peaty soil.
Cassiope fastigiataHimalaya; EricaceæPink; SummerA pretty little erect growing shrub about a foot high, suggesting a Club Moss or a small Conifer, with tiny bell-shaped blossoms. It is suitable only as a rock-work shrub in moist, peaty soil.
C. hypnoidesSiberiaWhiteEven smaller than the preceding, and needs the same treatment.
C. tetragonaNorth America and Northern EuropeWhiteThe tiny scale-like leave of this are arranged in four rows, thus giving the branches a curious square appearance. Succeeds under the same conditions as the others. The Cassiopes are difficult to grow.
CatalpaBignoniaceæ This genus of large deciduous trees is represented in both the eastern and western hemispheres, and contains about a dozen species. Only five of these are at present in cultivation in Britain or are known to be hardy, two being natives of North America and three of China. The Catalpas are some of the most striking and beautiful of all hardy trees, both in regard to foliage and to flower. The leaves are large and bold in outline, and the flowers borne in large terminal panicles towards the end of summer. Catalpas love a rich soil and abundant moisture. They are particularly well adapted for planting on the margins of ponds and water-courses. All the species have this peculiarity: they never form a terminal winter bud. In consequence of this, every shoot branches at its apex into two or three every spring, with the result that the trees naturally acquire a broad, spreading habit. This is especially apparent in the case of isolated trees growing on lawns—a position, it may be mentioned, in which Catalpas are seen to exceptional advantage. In the forests of North America, where they are drawn up by other trees, the Catalpas occasionally attain to heights of 50 feet to 100 feet. In gardens it may sometimes be advisable to help them to reach a moderate height, by keeping them to a single lead when young. All the species can be increased by cuttings of the roots, or of the fairly matured leafy growths.
*C. bignonioides (Syn. C. syringæfolia)Introduced from North America in 1726Creamy white blotched with yellow, and spotted with purple in the throat; July and AugustThis species is by far the commonest and best known of the Catalpas in Britain. It does not often attain a stature of more than 30 feet, although in its native woods it is met with twice as high. The broadly ovate leaves are in healthy trees of mature age about 6 inches long and 4 inches to five inches wide. The flower panicles are erect, branching, and pyramidal, frequently 1 foot in diameter at the base. The flower is 1½ inches across, with a broad bell-shaped base, the reflexed limb being elaborately frilled. The thin, kidney-bean-like fruits are 9 inches to 12 inches long, but in most parts of the country are only produced after exceptionally sunny seasons. The following varieties are in cultivation: Aurea, with rich yellow foliage; nana, a remarkable low shrub, 2 feet to 3 feet high, which never flowers, and can only be regarded as a curiosity; purpurea, with purple-tinged leaves and shoots.
C. BungeiNorthern ChinaWhite, spotted with purple; they, as well as the panicles, are larger than in Kæmpfer's CatalpaWhether the true C. Bungei is in cultivation at the present time is very doubtful. Certainly the plants supplied by some nurserymen under this name are only the dwarf variety (nana) of C. bignonioides. In any case the true C. Bungei has not flowered in Britain. It is a tree 30 feet high, with either entire or lobed leaves; they are 4 inches to 8 inches long, and about three-fourths as wide.
C. cordifolia (Syn.species)United States. It inhabits a more western region than C. bignonioides, and is found in the States of Kentucky, Louisiana, Tennessee, Missouri, Texas, &c.White, with yellow blotches in the throat; but the purple spots are not so abundant in C. bignonioides, whilst the panicles are large, and appear about a fortnight before.This is probably the finest species of Catalpa, but is not yet well known in Britain. In the United States it is often 50 feet high, and in exceptional cases over 100 feet. Owing to its having been for a long time confounded with C. bignonioides, this species was probably introduced unknowingly, and it may exist in some gardens under the other name. It is said to be somewhat the hardier of the two.
C. FargesiiChina. Introduced to France by M. Maurice de Vilmorin, and sent by him to Kew in 1899......Little known of this species yet.
C. hybridaA hybrid between C. cordifolia and C. Kæmpferi. Raised nearly thirty years ago by Mr. John C. Teas in Indiana, U.S.A.White, with yellow and purple markings on the throatIn the United States this appears likely to prove the finest of all the Catalpas, exceeding even C. cordifolia in the vigour of its growth and the size of its panicles. Four hundred flowers have been borne on a single panicle. Generally, the plant is intermediate between the two species that share its parentage.
C. KæmpferiChina; introduced by Siebold in 1849Flowers 1 inch across; reddish-brown and purple markingsWhilst this species—named in honour of Engelbert Kæmpfer, who visited Japan in the seventeenth century—bears a strong resemblance to the American C. bignonioides, it is neither so fine nor so ornamental a tree. It has naturally the same rounded habit, but is never so large. The leaves differ in frequently being more or less lobed. Kæmpfer noted this tree in Japan, and until a recent date it was regarded as indigenous to that country. Recent travellers have, however, concluded it to be (like many other popular trees in Japan) of Chinese origin solely. It is frequent in the grounds surrounding Buddhist temples in Japan.

CATALPA OR INDIAN BEAN TREE (Catalpa bignonioides).

Name.Country or Origin and Natural Order.Colour and Season.General Remarks.
*Ceanothus americanus (New Jersey Tea)Eastern United States; RhamneæWhitish; July and AugustA deciduous shrub, 3 to 4 feet high, that dies partially back during the winter. The flowers, which are borne in good-sized racemes, are at their best in July and August, and on that account are very valuable. It is one of the hardiest of the Ceanothuses, and in the South of England it will flower as a shrub in the open ground.
*C. azureusMexicoLight blue; July and AugustThis is not quite so hardy as the preceding, and it cannot be regarded as a shrub for the open ground, except in particularly favoured districts. It is, however, a delightful wall shrub. There are many garden varieties of this, mostly of Continental origin, of which may be especially mentioned Gloire de Versailles, blue; Marie Simon, pink; and Indigo, deep blue, very beautiful.
C. divaricatusCaliforniaPale blue; May and JuneSuitable only for a wall. With this amount of protection it will reach a height of 10 feet.
C. papillosusCaliforniaBlue; May and JuneLike the last, it is, except in the extreme west, essentially a wall plant; it is one of the best.
C. rigidusCaliforniaPurplish blue; Spring and early SummerThe leaves of this are small and neat, and its charming blossoms are on a wall borne sometimes as soon as April, and are kept up through May to June. It will reach a height of 6 to 8 feet.
C. thyrsiflorusCaliforniaBright blue; SummerIn its native country this attains to the dimensions of a small tree, but here it is essentially a wall plant. The flowers are in large racemes.
*C. veitchianusCaliforniaBright blue; May and JuneA species with neat dark-green leaves. It forms a delightful wall plant.
*Cercis Siliquastrum (Judas Tree)South Europe and West Asia; LeguminosæRose purple, but varies; May and JuneThroughout May and early June the Judas Tree is very beautiful, being smothered with pretty pear-shaped red blossoms. At Kew it flowers well in numerous places. It grows to a height of 20 feet or more in the Mediterranean region, though in gardens here it is more often represented by bushes of less than half that height. It thrives in sandy loam, and likes plenty of sun and air. The flowers are produced from all parts of the stems, much of the old wood being often smothered with flowering spurs. A variety with white flowers is in cultivation, and this may also be seen in flower at Kew. It is very free, and the flowers are of the purest white. A beautiful variety. In addition to this species, C. canadensis, from North America, and C. chinensis, a native of China and Japan, are also grown, whilst a fourth species, C. reniformis, from Western China, has lately put in an appearance.
*Chionanthus retusus (Fringe Tree)Japan; OleaceæPure white; Early SummerThis Chionanthus furnishes one of the many illustrations of the close affinity that exists between the flora of the United States and that of Japan, for it is very nearly related to the American Fringe Tree (Chionanthus virginicus), from which, however, it differs in being a smaller and more slender plant, while the clusters of flowers are rather less dense. When in bloom there is no danger of confounding these Chionanthuses with any other tree or shrub, as the pure white drooping fringe-like inflorescence is totally distinct from anything else. They are quite hardy, and not particular as to soil, though a fairly deep loam suits them best.
C. virginica (American Fringe Tree)North AmericaWhite, narrow, fringe-like petals; hence the nameAn interesting bush, but taller in its native country.
*Choisya ternata (Mexican Orange Flower)Mexico; RutaceæWhite; Summer, but much depends upon positionThis is a shrub for warm soils and sunny position, when it makes a big, leafy, glossy-leaved bush, smothered with clusters of white flowers that, from their appearance and fragrance, have earned the shrub the name of Orange Flower. At Munstead in Surrey it grows so rampantly that it has to be cut away to keep it within reasonable bounds. In "Wood and Garden," p. 63, it is mentioned, the month is May; "The Mexican Orange Flower (Choisya ternata) has been smothered in its white bloom, so closely resembling orange blossom. With a slight winter protection of fir boughs it seems quite at home on hot dry soil, grows fast, and is very easy to propagate by layers. When cut it lasts for more than a week in winter."
Cistus albidusSouth-West Europe; CistineæBright rose; June and JulyA shrub 4 to 5 feet high, with whitish leaves (hence the name of albidus) and a profusion of blossoms 2 inches across. It needs a dry, warm soil, hence will succeed on sloping banks, but even then, in the South of England, it is apt to be killed by a very severe winter. This last paragraph will apply to the genus Cistus in general.
C. crispusSouthern EuropeReddish purple; SummerReaches a height of a couple of feet, and bears its saucer-shaped blossoms in great profusion. The individual flowers are about 2½ inches in diameter.
*C. ladaniferus (Gum Cistus)South-West EuropeWhite; SummerA bush 4 to 5 feet high, with large, white, solitary flowers. The variety maculatus has a crimson blotch at the base of each petal.
*C. laurifolius (Laurel-leaved Cistus)South of EuropeWhite; July and AugustA sub-evergreen shrub 5 to 6 feet high, and the hardiest of all the Cistus. Of this there is also a variety maculatus blotched at the base with purple crimson, which forms a delightful shrub.
C. monspeliensisSouth of EuropeWhite; SummerA compact bush 4 feet high, with flowers about an inch across.
C. populifolius (Poplar-leaved Cistus)LevantWhite; SummerThe leaves of this are very distinct, being heart-shaped and long-stalked, whilst the plant itself will attain a height of 6 feet.
C. purpureusSouth-East EuropeReddish purple with a maroon blotchThis is only suitable for planting in the West of England, but where not injured by frost it is a delightful shrub, a little over a yard high.
*C. villosusMediterranean regionReddish purpleA compact shrub, whose reddish-purple blossoms are about 2½ inches across.

CISTUS VILLOSUS.