TREVIRANA. 



318 



TRISTANIA. 



I against au east or west wall, and 

 carefully trained, giving it a little 

 protection in case of severe frosts. 



Tree Mallow. — Lavdtera. — 

 Besides the common annual species 

 of Lavatera, there are nine or ten 

 species which are shrubby, and one 

 of which, L. ])hcemcea, a native of 

 the Canary Isles, is a tree ten feet 

 high. L. maritima is the com- 

 monest kind ; and as this is a na- 

 tive of Spain and the South of 

 France, it will thrive in the open 

 air in England, if slightly pro- 

 tected during severe frosts. L. tri- 

 loba, L. sidiovata, and L. africdna, 

 have all the same degree of hardi- 

 ness, and they will all live and flower 

 in British gardens, if about the same 

 care be bestowed on them as is 

 usually given to the Tree Pasony. 

 L. O'lbia, with reddish flowers, L. 

 Pseudo-O'lbia, 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 Tkifo'litjm. 



T'R'Eyi.Y.'iAjK.-CryptogariiiaFungi. 

 — A kind of lichen found on the 

 ground and on trees in damp places, 

 and resembling jelly. 



Trevira'xa. — ScrophuldrincB. 

 — The plant commonly called T. 

 cocclnea, or Cyrllla 'pulcliella, is 

 now included in the genus Achi- 

 menes. It is a dwarf shrub with 

 bright scarlet flowers, which it pro- 

 duces 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 ia 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 ad- 



visable to heat the water to 120 

 degrees. It is propagated by di- 

 viding the roots in February, 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 improved 

 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 growing. 

 Thus treated, the plants will become 

 compact little bushes, and will flower 

 abundantly. For the other species 

 of the genus, see Achime'nes. 



TRicHOSA'isTHES.-6'itcit?-6i^dceeF. 

 — See Snake Gourd. 



Trifo'lium. — Leguminosce. — 

 The Clover or Trefoil. — Those who 

 are accustomed to consider the Tre- 

 foil as only the common clover of 

 the meadows, will probably be sur- 

 prised to find that there are nearly 

 a hundred 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 efiect. 



Tripti'lion. — CompositcE. — Chi- 

 lian annuals, which are hardy in 

 Britain, and worth growing for their 

 curious feathery seeds. 



Trista'nia. — Myrtacece. — Aus- 

 tralian shrubs, nearly allied to Me- 

 laleuca ; which require a greenhouse 

 in England. They should be grown 



