182 TRI 
late, cilitate serrate; peduncles 1-flowered, incrassate; sub-inflated ; 
calyx angled. 
17—2. TANACETUM. 
Exotic. 
Vuiga’re, (tansey. y. Ju. 2) leaves doubly.pinnate, gash-serrate. Na- 
turalized. Var. crispwm, (double tansey,) leaves crisped and dense. 
13—l. TEUCRIUM. (From Teucer#a Trojan prince.) 
Canaden’’se, (wood sage, germander. O. r. Ju. 21) pubescent; leaves 
lance-ovate, serrate, petioled ; stem erect; spikes whorled, crowded ; 
bracts longer than the calyx. Var. virginicum, upper leaves sub- 
sessile; bracts about the length of the calyx. 1—3.'f. 
13—1. THYMUS. (From thumos, force.) 
Exotic. 
Vulga’ris, (thyme. b-p. J. 2, kh) erect; leaves ovate and linear, revo- 
lute; flowers in a whorled spike. 
6-1. TRADESCANTIA. (From ‘Tradescant, a botanist.) 
Virgini’ca, (spider wort. b-p. M. 21) erect, branching ; leaves lanceo- 
late, elongated, glabrous: flowers sessile ; umbel-compact pubescent, 
Cultivated. 1—2. f. 
16—10. TRIFOLIUM. (From éres, 3, and folium, a leaf.) 
Re’pens, (white clover. O. w. M. 2) creeping; leafets ovate-oblong, 
emarginate, serrulate; flower in umbelled heads; teeth of the calyx 
sub-equal; legumes 4-seeded. 
Praten’’se, (red clover. O. r. M. 21) ascending, smoothish, leafet ovate, 
sub-entire; stipules awned; spikes dense-ovate; lower tooth of the 
calyx shorter than the tube of the corolla, and longer than the other: 
teeth, 2—2. f. 
6—3. TRILLIUM. (From triliz, triple.) 
‘Brec’’tum, (false wake robin. O. p. w-y. 2|) peduncles erect or erectish, 
with the flowers a little nodding; petals ovate, acuminate, spreading ; 
equalling the calyx; leaves rhomboid, acuminate, sessile. Var. atro- 
purpwrewm, petals large, dark purple. Var. albwm, petals smaller, 
‘white; germred. Var. flavum, petals yellow; both petals and calyx 
leaves longer and narrower. 12 to 18 incheshigh. Leaves often 3 
40 4 inches broad. Peduncles about 3 inches long. 9—16. i. 
3—2. TRITICUM. (From tero, to beat or thresh.) 
Exotic. 
Hyber’’num, (winter wheat. J. 3!) calyx glume 4-flowered, tumid, even, 
imbricate, abrupt, with a short compressed point; stipule jagged ; co- 
rollas of the upper florets somewhat bearded. There are several] 
varieties of this species which are introduced by eulture. - 
