Townsendia 



( 399 ) 



Trades cantia 



Propagation, by cuttings in a close case. Soil, 

 fibrous loam, one-third peat, and plenty of sand. 



Principal Species : 



amazouica, G' to 10', st. (/. Micrauthera clu- 



choisyana, 10', My., yel. siasfolia). 



TOWNSENDIA. 



A small ^eiius of annual or perennial herbs (ord. 

 Compositte) allied to Aster, and requiring similar 

 treatment. The rays vary from rose to white. 

 They are of little horticultural value. Wrightii is 

 now referred to Aster Wrightii. 



TOXICODENDRON of THUNBEBG(y. 

 HY^ENACHNE). 



Two species of large, greenhouse shrubs (ord. 

 Enphorbiacese). Propagation, by cuttings in sand 

 in a dry stove heat. Soil, light sandy loam, 

 broken bricks or crocks, and sand. They are 

 suitable for associating with succulents. Caper.se 

 (tyn. IIya:nachne glob'osa), ti', June, green, is the 

 only introduction. For Toxicodendron of Linnaeus, 

 tee Kims Toxicodendron, the Poison Ivy. Toxico- 

 dendron of Gsertner is Allophylus. 



TRACHEA. 



This is a small genus of Moths belonging 1 to the 

 Noctme, of which piniperda, the Pine Beauty 

 Moth, is British. These moths, which are red or 

 reddish brown with grey and orange markings and 

 white spots on the middle of the wings, are to be 

 seen in early spring. The larva; are yellowish green, 

 lined with white above and orange beneath. They 

 feed upon the leaves of Firs in summer, and usually 

 spin their cocoons and pupate in crevices of the 

 bark, occasionally in the soil. Although the moths 

 are not often sufficiently numerous to do much 

 harm, a bad attack may be reduced by shaking the 

 caterpillars from small trees. Grease banding 

 large trees is helpful. 



The name Tracheae is also given to the breathing 

 tubes of insects (see INSECTS) and to certain 

 thickened vessels of the wood of trees which 

 resemble these trachea; in build. 



TRACHELIUM. 



Dwarf, greenhouse, perennial herbs (ord. Cam- 

 panulaceaa). Propagation, by seeds sown in heat 

 in spring, or by cuttings. Soil, fibrous loam, with 

 a fourth part of leaf mould, and sand. Plants 

 raised from cuttings in spring may be grown in 

 frames during summer, and pinched once or twice 

 to make them bushy. At the last shift a little 

 dried and powdered cow dung may be mixed with 

 the compost. For greenhouse and conservatory 

 decoration caerulcam is invaluable, and very 

 popular on account of the light and graceful 

 character of the flowers. 



Principal Species : 

 cieruleum, 1' to 3', sum. album, wh. 



to win., palu bL 



TRACHELOSPERMUM (*yn*. 

 PARKCHITES, RHI-NCHOSPERMUM, and 

 TRIADENIA). 



Greenhouse and hardy evergreen climbers (ord. 

 Apocynacea;). Propagation, by cuttings in sand, 

 under a bell-glass. Soil, equal parts pent and 

 loam, with sand. 



Tairn Cri'it (see Lepitliiim mtlrnm). 

 Toxicophlcca (see Acokanthcra). 



Principal Species and Varieties : 



jasminoides,6' to 10', sum., narrower, lidy. on a 



wh. , fragrant (*//. wall (xyn. Trachelo- 



Parechites Thunbergii spermum angusti- 



and Rhyncospennum folium). 



jasminoides). variegatum and varium 



angustifolium, ITS. are other vars. 



TRACHYCARPUS. 



Two species of fan Palms (ord. Palma;), one of 

 which, excelsa, is hardy in the more favoured 

 parts of Britain and Ireland if planted in sheltered 

 situations to prevent the leaves being damaged by 

 wind. Most often they are grown in a green- 

 house, occasionally in a stove. The heads of 

 yellowish white flowers are striking. Propagation, 

 by imported seeds in heat and by offsets (sec 

 PALMS). Soil, fibrous loam, with a third of peat 

 and some sand. If large specimens in tubs are 

 desired some leaf mould and dried cow dung may 

 be added. 



Only Species : 



excelsa, 6' to 60', sura., martiana, 9', grh., yel. 



hdy. or grh., yellowish (xyiis. Griffithii and 



wh. (tyH. Fortunei and khasyana, and Chanuu- 



Chanucrops Fortuuei). rops Grifnthii nail 



martiaua). 



TRACHYLOBIUM. 



Stove evergreen trees (ord. Leguminosa;). Prop- 

 agation, by cuttings of young shoots under a bell- 

 glass. Soil, a good, mellow loam and peat. 



Only Species: 

 honiemannianum. Copal. verrucosum, 20', wh. 



TRACHYMENE. 



Annual or perennial greenhouse plants (ord 

 Umbelliferse). Propagation, by seeds in heat, the 

 perennials by cuttings in sand. Soil, loam, sand, 

 and peat. 



Principal Species : 



coerulea, 1.J', Jy.,hlf-hdy. Rudge; correctly 



ami., bl. (si/it. Didiscus Siebera Billard eri 



caeruleus). lanceolata). 



compressa, 1', per., yel. linearis, 2', Jy., per., yel. 



(coiTectlySiebera.com- (correctly oieberu 



pressa). linearifolia). 



lanceolata, 3', sum., per., ovalis, 1', My., per., wh. 



wh. (Sprengel, not (correctly Siebera Bil 

 lariUeri). 



TRACHYSTEMON. 



Hardy perennials (ord. Boraginese). Propagation, 

 by seeds or division in spring. Any common soil 



Only Species : 

 | creticus, 1', My., bl. plish bl. (syii. Borago 



_(*;/. Borago cretica). orientalis). 



orientalis, 2', Mch. , pur- 



TRADESCANTIA. (SPIDERWORT.) 



Ornamental, stove, greenhouse, or hardy herbs 

 (ord. C'ommelinaceas), of considerable value. The 

 popular pendula is properly Zebrina pendula. 

 Propagation, the stove and greenhouse species by 

 cuttings in light soil, the hardy ones by division or 

 by seeds in spring. Common soil. 



Principal Species and Varieties : 

 ronsii-sta, 2', Jy., hdy., sum., st., pk., Ivs. grn., 



light bl. banded wh. 



crassifolia, 2', Aug., lilf- fuscata, 8", Sep., st., 



hdy. , purplish ro. or ' bluish pur. 



hi. iridescens (see crassifolia 



acaulis, differs little var.). 



(xi/ iridescens). navivularis, trailer, sum. , 



o'.ongata, procumbent, 2', st., pk. 



