Tigridia.—Lovely bulbous plants called tiger flowers, useful in the warmest parts of the kingdom for the border in rich but gritty soil. T. Pavonia, the peacock tiger flower, from Mexico, grows 1 to 2 ft. high, with plaited sword-like leaves, and large flowers about 6 in. across, having zones of violet and yellow blotched with purple and tipped with scarlet. There are many varieties, all charming.
Trillium.—T. grandiflorum, the wood-lily of North America, is the finest. It has large white flowers and grows freely in peaty soil in shady borders. There are several other species, some with purplish flowers.
Tritonia.—A genus of South African plants with fibrous-coated corms or solid bulbs, often known as montbretas. T. crocata, 2 ft., orange-yellow, T. crocosmiaeflora, 2 to 2½ ft., orange-scarlet, and T. Pottsi, 3 to 4 ft., bright yellow, are the best-known varieties, of which there are many subsidiary ones, some being very large and free in flowering. A rich, gritty soil, and warm, sunny situations are best for these plants.
Triteleia.—Charming spring-flowering bulbs, thriving in any good sandy soil. T. Murrayana, 8 in., lavender-blue, and T. uniflora, 6 in., white, are both pretty plants of the easiest culture, either for borders or rockeries.
Tritoma.—Splendid stoutish-growing plants of noble aspect, familiarly known as the Poker plant, from their erect, rigid spikes of flame-coloured flowers; sometimes called Kniphofia. T. Uvaria, 3 to 4 ft., bright orange-red, passing to yellow in the lower flowers, is a fine autumnal decorative plant. They should be protected from frosts by a covering of ashes over the crown during winter.
Trollius.—Showy ranunculaceous plants, of free growth, flowering about May and June. T. europaeus, 18 in., lemon globular; T. asiaticus, 2 ft., deep yellow; and T. napellifolius, 2 to 2½ ft., golden yellow, are all fine showy kinds. Rich and rather moist soil.
Tulipa.—Splendid dwarfish bulbs, thriving in deep, sandy, well-enriched garden soil, and increased by offsets. They bloom during the spring and early summer months. T. Gesneriana, the parent of the florists’ tulip, 12 to 18 in., crimson and other colours; T. Eichleri, 1 ft., crimson with dark spot; T. Greigi, 1 ft., orange with dark spot edged with yellow, and having dark spotted leaves; T. oculus solis, 1 ft., scarlet with black centre; and T. sylvestris, 12 to 18 in., bright yellow, are showy kinds.
Veratrum.—Distinct liliaceous plants with bold ornamental leaves regularly folded and plaited. V. album, 3 to 5 ft., has whitish blossoms in dense panicles, 1 to 2 ft. long. V. nigrum, 2 to 3 ft., has blackish-purple flowers, also V. Maacki, 2 ft. Rich sandy loam and peat.
Verbascum.—Showy border flowers of erect spire-like habit, of the easiest culture. V. Chaixii, 4 to 5 ft., yellow, in large pyramidal panicles; V. phoeniceum, 3 ft., rich purple or white; and V. formosum, 6 ft., golden yellow in dense panicles, are desirable species.
Veronica.—The Speedwell family, containing many ornamental members; all the hardy species are of the easiest cultivation in ordinary garden soil. The rotate flowers are in close, erect spikes, sometimes branched. V. crassifolia, 2 ft., dark blue; V. incarnata, 1½ ft., flesh-colour; V. corymbosa, 1½ ft., pale blue in corymbosely-arranged racemes; V. gentianoides, 2 ft., grey with blue streaks; V. spicata, blue, and its charming white variety alba; and V. virginica, 5 ft., white, are distinct.