thysano'tus. 



289 TONQUIN BEAN. 



(see Acarus) ; but these insects sel- 

 dom appear upon it when it is grown 

 in the open air. When treated as an 

 annual, the seeds should be sown in 

 January on a slight hotbed, or in a 

 sheltered situation in the open ground. 

 The best soil for them is equal parts 

 of peat and silver sand, to which a 

 little vegetable mould may be added. 

 The soil should be kept moist, but it 

 should be well drained, as the plants 

 will perish if either kept too dry or 

 suffered to have their roots in stag- 

 nant water. When planted in the 

 open air, where they are finally to 

 remain, the long shoots should be 

 pegged down at the joints all over the 

 bed ; and thus treated they will send 

 up innumerable flower-stalks, so as to 

 make the whole bed appear a mass of 

 flowers. T. aurantiaca may be 

 treated in the same manner ; but T. 

 a. albiflbra is rather more tender, 

 and appears generally to succeed bet- 

 ter in a greenhouse than in the open 

 air. When these plants are grown in 

 a stove and beset with the red spider, 

 the only way to destroy it is to sy- 

 ringe them with water heated to 120°. 

 The other species of Thunbergia are 

 always kept in the stove, and I believe 

 have never been treated as annuals, 

 though most of them seed freely. 

 They are grown in loam and peat, 

 and are propagated by cuttings. 



Thyme See Thymus. 



Thymus. — Labiates.-- TheThyme. 

 Fragrant dwarf shrubs, very suitable 

 for rockwork. T. grandiflbra is, 

 perhaps, the most ornamental. They 

 should be grown in light rich soil, and 

 are increased by dividing the root. 



Thysano v tus. — Asphodelece . — 

 Australian plants, with very singularly 

 fringed flowers. The flowers expand 

 about eight o'clock in the morning, 

 and they close at two, never remain- 

 ing unclosed longer than six hours. 

 They are grown in a greenhouse or 

 stove, in sandy loam and peat ; and, 



like all the Australian plants, care 

 should be taken not to let them suf- 

 fer from any excess, either of drought 

 or moisture. They are propagated 

 either by division of the root, or by 

 seed. 



Tiger Flower. — See Tigridia. 



Tigri'dia. — Iridece. — The Tiger 

 Flower. The commonest species of 

 this splendid bulb was formerly called 

 Ferraria Tigridia, but it is uow 

 changed to Tigridia pavonia : there 

 is a variety called T. p. leone, and a 

 second species called T. conchiflora. 

 They are all extremely handsome, 

 producing abundance of their magni- 

 ficent flowers in the open ground, 

 which, however, are very short-lived, 

 seldom remaining expanded more than 

 a few hours. The plants are natives 

 of Mexico, and the bulbs may be 

 suffered to remain in the ground all 

 the year if they can be kept dry ; there 

 being more danger of their being de- 

 stroyed by wet than frost. The best 

 mode of treating them is perhaps that 

 recommended for the Ixia. (See Ixia.) 



Tile-root. — See Geissorhiza. 



Tilla'ndsia. — Bromeliacece. — 

 Very curious stove-plants, most of 

 which are parasitical, and may be 

 treated like the stove Orchidacece. 

 (See Orchideous Epiphytes.) The 

 others may be potted in a mixture of 

 peat and loam, and propagated by 

 suckers. They have all showy flowers, 

 which they produce abundantly. 



Toad-flax- — See Linarta. 



Tobacco. — See Nicotiana. 



Tolpis. — See Hawkweed. 



Tonquin Bean. — Dipterix odo- 

 rata, Schreb. — (Baryosma Tongo, 

 Gsert.) — A leguminous plant, of no 

 beauty in its flowers, which are purple, 

 but cultivated for its bean-like seeds, 

 which are remarkably fragrant. It is 

 a native of Guiana, where it is a tall 

 tree ; and it requires a stove in Eng- 

 land, where it may be grown in a 

 compost of peat and loam. 



u 



