LOCATIONS FOR CULTIVATION
Cacti may be grown out of doors in the entire southwestern section of the United States, in Mexico, Central America, and South America (except the southern part), where the temperatures are never colder than fifteen to twenty-five degrees below freezing. Also, they can be grown successfully out of doors in parts of Spain and Portugal, and in the region immediately bordering the Mediterranean Sea, over much of Africa lying at the lower altitudes, in Arabia, Persia, India, southern China, extreme southern Japan, and the northern half of Australia, in addition to the islands of the Pacific, nearly all of which lie between the 33° parallels, north and south (except where the temperatures are modified by mountains or other natural features).
They can be grown indoors generally in the north and south temperate zones between the 34° and 54° parallels, north and south, where the temperatures reach as low as twenty to thirty degrees below zero. This includes the northern two-thirds of the United States, the lower half of the Dominion of Canada, Great Britain, Ireland, France, Germany, Austria, the northern half of the Chinese Republic, Japan, and the southern part of South America.
The Cereus Group or Torch Flower Cacti (Cereus)
How to identify and how they grow
Many species of this group can be identified by the beautiful candelabralike branching of the plants. They are trees, shrubs, or climbers, and grow erect or spread out, the tallest and largest trees or plants of the cactus family. They are the “torch flower” cacti, are tropical or subtropical, the stems growing single or clustered, with prominent ridges or flutes which in many instances expand or contract as the plant fills with water or loses its moisture. The tubercles are not conspicuous and grow in rows on the ridges. There are no leaves nor spicules. The spines are of one or two kinds, sharp and dangerous in some species, inconspicuous in others, growing from one-fourth inch to twelve inches in length. The flowers are funnel-form, of brilliant or delicate colorings, large and showy, and unlike many cactus blossoms are fragrant, often with a pronounced spicy odor. In some instances they crown the candelabralike branches in a becoming aureola of light, giving the effect of a lighted candelabrum; hence the designation “torch flower” cacti. Most species bloom only at night. As a rule the calyx tube is found to be very long. The fruit is usually quite large, has shallow tubercles, and is covered with many scales, but is rarely spiny.
How to grow
Only a few of the different kinds of the Cereus Group grow well from cuttings, including Cereus serpentinus. Set the cuttings of such plants as this Serpent Cactus a few inches deep in moist sandy soil and irrigate sufficiently to keep the soil moist. The cuttings grow best in part shade. Cereus plants grow readily from seeds sown in sandy loam mixed with a small amount of pulverized charcoal and some leaf mold; plant in pots or flats one-fourth inch to one inch deep in the soil in partial shade, and keep the soil moist. The young plants can be transplanted to pots when one-half inch to one inch tall. They grow indoors or out; a southern exposure is preferable, being warmer and more sunny.
Caterpillar Cactus; Creeping Devil Cactus; Chirinola (Cereus eruca)
(Named “eruca,” or “caterpillar cactus,” because the stems turn upward at their tips, resembling a caterpillar, head and body)
How to identify and how it grows
The prostrate stems, three to nine feet long, lie flat on the ground with their tips upturned, resembling huge caterpillars. They grow in light sandy soils or sand, and root from below, the tips of the stems elongating and growing forward, the bases of the stems dying; thus the plant slowly moves forward over the sand. These prostrate stems, two or three inches in diameter, are very spiny, with fifteen radial and four central spines clustering an inch or so apart on the twelve to seventeen ridges which run lengthwise on the stems. These fierce, sharp thorns are dark brown and dull tan and turn white with age; the tips are translucent yellow. The radials are less than an inch long and flattened, the centrals grow to two inches in length, one very stout and strongly flattened, resembling a dagger and with a white body. The large flowers are bright yellow and grow four or five inches in length, narrow and funnel-shaped, about two inches across. The fruit is very spiny; but the thorns fall away at maturity, and it becomes quite edible and is relished by Indians and Mexicans.
How to grow
Plant in sand or sandy soil, preferably fine sand, with the tips slightly upward, and keep the sand lightly moist. The plant requires a hot, sunny location and will grow out of doors in the Southwest where the temperatures do not drop more than a few degrees below freezing, and in hot dry conservatories and greenhouses where the temperatures drop lower.
Senita, Zina, or Sina (Cereus Schottii)
(Named from its appearance of old age, and for F. A. Schott, a botanical explorer of western United States)
How to identify and how it grows
These plants grow in colonies or patches in the mountain cañons, twenty to fifty stems in a clump, the dense branches interlocking in huge clusters twenty-five feet high and twenty feet or more across. The yellow-green stems are scalloped and cylindric, five or six inches in diameter, growing four to twenty feet or more in height, with five to nine ridges running lengthwise from top to bottom. On these ridges cluster the spines, silvery stout thorns about one-fourth inch long on the young plants; the older spines are really dense bristles, slender, flexible, symmetrically twisted, appearing like fine purplish gray bands, one and one-half to three inches long, and giving the appearance of old age. The flowers are shaped like a bell an inch and a half long and about as broad, pale pink and cream-white petals shading into deep pink at their tips, opening only at night. The fruit is globose, an inch or more in diameter, of a deep reddish tinge, and fleshy.
How to grow
Plants may be grown from seed in sandy soil in flats or pots; young plants may be transplanted in spring in sandy, gravelly, or rocky soil. Water during dry weather enough to moisten the soil well. The plants can be grown out of doors only where the coldest winter temperatures are but a few degrees below freezing. In other parts of the country, grow in hot, dry conservatories or greenhouses.
Prohibition Cactus (Cereus Emoryi)
(Named in honor of Lieutenant Colonel Emory, who was in charge of the Mexican Boundary Survey)
How to identify and how it grows
This is a low-branched plant a foot or two high, growing prostrate with erect branches in thick impenetrable masses ten to twenty feet across. Numerous stiff, needlelike thorns form a dense spiny yellowish coating over the entire mass. There are many pale yellow to yellow-brown flowers an inch and a half long which cluster near the tips of the stems. The fruit is globose and densely spiny, an inch or so in diameter. The plant is not attractive nor very cereus-like.
How to grow
This species can be transplanted in the spring by digging rooted stems, planting in gravelly clay soil, and irrigating sufficiently to moisten the soil in dry periods; or by digging a shallow hole and partly covering the stems with soil kept moist but not wet. The plants will grow out of doors and endure only a few degrees of frost; where the temperature drops more than fifteen degrees below freezing they must be protected outside, or grown indoors or in a warm, sunny greenhouse.
Old Man Cactus; White Persian Cat Cactus; Bunny Cactus (Cereus senilis)
(Named from the long white hairs or beards found on young plants)
How to identify and how it grows
This cactus is columnar, and some mature plants reach a height of forty-five feet. It is native to Mexico and not easily accessible. The trunk is usually unbranched, cylindrical in young plants, two or three inches in diameter, yellow-green with a scurfy waxy coating; and it is not tough. A large tree can be cut down with a small pocketknife in some instances. The twenty or twenty-five radial spines are changed over into long coarse white hairs, four to twelve inches long or even longer, and form a dense covering; hence the common and specific names, Old Man Cactus and senilis. These radials are crooked, flattened, and twisted, while the one to four central thorns are easily pulled out, all spines very fragile. In maturity a dense mass of tawny wool appears around the head of the plant. The rose-colored blossoms are two inches long, shaped like a bell or funnel, and appear only on the older cacti. They open at night and close in the early morning. The fruit is about the size of a large strawberry; it, too, is rose-colored and covered with scales and tufts of wool.
How to grow
Plants may be grown from seed in flats or pots, but the seed is rare and difficult to get. Commonly young plants are purchased and grown in pots in gravelly, sandy limestone soil. Water sufficiently to keep the soil slightly moist. A bright sunny location is best. The plants are tender to frost and thrive best in warm conservatories or greenhouses. The Old Man Cactus is a popular plant for rock gardens and is found in many homes both in this country and abroad.
Pipe Organ Cactus; Pitahaya (Cereus Thurberi)
(Named in honor of George Thurber, botanist of the Mexican Boundary Commission)
How to identify and how it grows
These are large, columnar, symmetrical plants ten to twenty feet tall; the large columns of yellow-green stems, in six to thirty branches ascending from near the base, look much like the pipes of a great organ at a distance. The stems are from six inches to nearly two feet in diameter and are cylindrical, with fifteen to nineteen ridges lined with clusters of slender, spreading, grayish spines. The flowers, which appear only at the tips of the stems, are three inches long and half as wide, and open always at night; their delicate pink petals are suffused with green and banded in white or green, and their purple sepals are tinged with red. The fruit is very delicious, sweet and juicy, olive-green, globular, with scarlet fleshy pulp. The Pipe Organ Cactus is shown on the cover of this book. It is one of the finest of the Cactus Clan.
How to grow
Sow seed in sandy soil in pots or flats with partial shade; young plants may be transplanted in spring or early summer in rocky or gravelly soil and watered during dry spells once a month to moisten the soil well. The plants can be grown out of doors in the Southwest where the lowest winter temperatures are only a few degrees below freezing. In other parts of the country they may be grown indoors in rock gardens or in warm sunny conservatories.
Serpent Cactus; Mexican Night Blooming Cereus; Reina de Noche (Cereus serpentinus)
(Named specifically from the snakelike stems)
How to identify and how it grows
The six to fifteen entangled stems of this weird cactus resemble a serpent. They are eight to fifteen feet tall, about an inch in diameter, generally growing erect for about ten feet, then bending over and climbing for several feet. Each bears a dozen or so low ridges lined with clusters of slender spines a half-inch or so long, translucent white or dull cream color. The large brilliant blooms are eight to nine inches long and when fully open five to seven inches across, with soft cream-white petals and pink and tan sepals touched with green, both strongly reflexed. The strong spicy fragrance is much like that of a tuberose. Each plant blooms at night and only one night in the year. The different plants blossom from April into June. The plants run wild in Mexico and form a luxuriant growth; they are prized as rare beauties by the Mexicans and Indians.
How to grow
Set cuttings about a foot long in moist soil, and water weekly; or lay the stems down and cover with moist sand or soil. When grown outside in sunny exposures but in the protection of dwellings the plants are not injured by twenty degrees of frost. In colder weather than this they may be grown in warm, sunny conservatories.
Giant Cactus or Sahuaro; Sage of the Desert (Cereus giganteus)
How to identify and how it grows
These are majestic trees thirty to fifty feet tall, with columnar massive trunks which grow singly ten to fifteen feet, then curve sharply erect in branches like a giant candelabrum. Twenty to twenty-five ridges run the entire length of the trunk, and these flutings expand as the plant fills with water and contract as it loses its moisture. They are covered with long sharp spikes which stick out like diminutive swords closely packed along the tops of the ridges. The flowers are night blooming, four or five inches long and half as wide, growing solitary but in such masses as to appear clustered, with large satiny, waxy white petals strongly reflexed. The fruit is about the shape and size of an egg, with crimson pulp, palatable and prized highly by the Indians. The Giant Cactus is one of the largest cacti in the world and can blossom and bear fruit for three years without rain, using the reservoir of water that Nature provides.
How to grow
The plants grow readily from seed sown in sandy soil in pots or flats and may be transplanted when a half-inch tall. The soil should be kept moist but never wet. Transplant young plants one to six feet high in spring, taking two feet of the roots with care not to injure them, and set in gravelly clay soil, irrigating once a month during dry seasons. Giant cactus plants one foot tall or taller thrive out of doors and will endure a temperature twenty degrees below freezing without injury. Where the weather is colder than this they must be protected in winter, or grown in dry sunny conservatories or indoor rock gardens.
Night Blooming Cereus; Reina de Noche; Queen of Night (Cereus Greggii)
(Named in honor of Dr. J. Gregg, student of cacti and plant explorer of Northern Mexico)
How to identify and how it grows
One of the most beautiful of all cactus flowers. The plants grow two to three feet tall, rarely eight feet, the blackish grotesque stems densely fine hairy and loosely branched, resembling a crooked stick or a snake. They are very slender, a half-inch or so in diameter, and are fluted with four to six blackish gray-green ridges, lined with spines less than a fourth-inch long. The latter are arranged in such manner as to resemble a small insect, and have thick bulbous bases. Each slender trunk is supported by a central woody core. There is a fleshy root a foot or so below the ground, weighing fifty to a hundred pounds, which acts as a reservoir for water and food, so that the Greggii blossoms every year, rain or no rain. The flowers are from seven to ten inches long and about six inches across, showing a beautiful combination of coloring, a background of soft waxy white shading into pale lavender in the forty or more petals, with touches of pink and tan in the sepals, forming into a cornucopia. The stamens form a corona extending beyond the petals. The fragrance is delightfully spicy, strong, and persistent; the plants blossom only one night each year, generally in the latter part of June. This most beautiful of all the cacti in our Southwest usually grows in the lee of a creosote or other desert shrub in sandy loam.
How to grow
Grow plants from seed in pots or flats, in sandy loam with partial shade, or transplant without injuring the large fleshy root, setting the top of the root about a foot below the surface in loamy soil in the protection of shrubs; mature plants will blossom within two years of transplanting. Water well during the growing season, in dry weather about once a month. Do not cultivate. Plants grow out of doors or indoors and will endure a temperature of twenty-five degrees below freezing without injury. In localities where the winter weather is colder than this the plants must be protected or grown under glass.
CHAPTER II
CACTUS SPINES AND PECULIARITIES
And now we will pause in our trip across Cactus Land to take up the many peculiar features which characterize and differentiate these odd desert plants, and to tell of those individual and unique growths, the terrible swordlike thorns of the strange Fantastic Clan.