TRICHOME v NA. 



292 



tro'llius. 



the open air in England, if slightly 

 protected during severe frosts. L. 

 triloba, L. subovata, and L. afri- 

 cana, have all the same degree of 

 hardiness, and they will all live and 

 flower iii British gardens, if about the 

 same care be bestowed on them as is 

 usually given to the tree Peony. L. 

 Olbia, with reddish flowers — L. 

 Pseudo-Olbia, with pale purple 

 flowers — L. unguiculata, and L. 

 hispida, are all shrubby species, 

 which require a greenhouse, and should 

 be grown in loam and peat. 



Trefoil. — See Trifolium. 



Treme'lla. — Cryptogamia Fungi. 

 — A kind of lichen found on dead 

 wood, the surface of which is powdery. 



Trevira na. — Scrophularinece. — 

 There is only one species, T. coccinea, 

 and this is perhaps better known as 

 Cyrilla pulchella. It is a dwarf 

 shrub with bright scarlet flowers, 

 which it produces in September ; and 

 it should be kept either in a stove or 

 in a warm greenhouse, the heat of 

 which is between 60 and 70 degrees. 

 It should be grown in a compost 

 formed of equal parts of loam, peat, 

 and sand, enriched with rotten cow- 

 dung or vegetable mould, and it 

 should be well and frequently syringed 

 with warm water, to keep it clear of 

 insects. When it is much infested 

 with them, it will be advisable to heat 

 the water to 120 degrees. It is pro- 

 pagated by dividing the roots in Feb- 

 ruary, taking care not to bruise them ; 

 or by cuttings of the points of the 

 shoots taken off in August ; and in 

 both cases the plants are much im- 

 proved by frequently shifting them as 

 the pots fill with roots, and always 

 into pots only a little larger than 

 those in which the plants were grow- 

 ing. Thus treated, the plants will 

 become compact little bushes, and will 

 flower abundantly. 



Trichome v na. — Iridece. — Bulbous 

 plants, with fine hair-like stems, re- 



quiring the usual treatment of Cape 

 bulbs. See Ixia. 



Tricosanthus. — Cucurbitacece. 

 -—See Snake Gourd. 



Trifolium. — Leguminosee. — The 

 clover, or Trefoil. Those who are 

 accustomed to consider the trefoil 

 as only the common clover of the 

 meadows, will probably be surprised 

 to find that there are nearly a hun- 

 dred and fifty species, all more or 

 less ornamental. Some of these are 

 perennials and some annuals ; and 

 the colour of their flowers varies 

 from dark crimson, and sometimes 

 scarlet, to purple on the one hand, 

 and to white, cream-colour, and pale 

 yellow on the other. 



Tri'llium. — Melanthacece.' — Tu- 

 berous-rooted plants, generally with 

 dark brown or reddish flowers, which 

 have a remarkably rich and velvet- 

 like appearance. They are all natives 

 of North America, and they should 

 all be grown in shady places, in sandy 

 peat kept moist. Thus treated they 

 will flower freely, and their flowers 

 will have a very rich and singular 

 effect. 



Tripti'llon. — Composites. — Chi- 

 lian annuals, which are hardy in 

 Britain, and worth growing for their 

 curious feathery 6eeds. 



Trista x nia. — Myrtacece. — Aus- 

 tralian shrubs, nearly allied to Mela- 

 leuca ; which require a greenhouse in 

 England. They should be grown in 

 sandy peat, and they are propagated 

 by cuttings. 



Trito v nia. — Iridece. — Bulbous 

 plants with splendid flowers, which 

 will thrive in the open ground for 

 many years without taking up, if 

 grown in a dry sandy soil, or pro- 

 tected from rain during winter. See 

 Ixia. 



Tro'lliits. — Ranunculacece. — 

 The Globe flower, is a British plant 

 frequently grown in gardens, but on 

 which cultivation appears to have had 



