Z82 T R I 



late, cilitate serrate; peduncles 1-flowered, incrassmtt; sub-in flaxed ; 

 calyx arigted. 



172. TANACETUM. 



Exotic. 



Vulga're, (tansey. y. Ju. 0].) leaves doubly pinnate, gash-serrate. Na- 

 turalized. Var. crispum, (double tansey,) leaves crisped and dens?. 



131. TEUCRIUM. (From Teucer, a Trojan pr?.nce.) 



Canaden"se, (wood sage, germander. O. r. Ju. 7J.) pubescent ; leaves 

 lance-ovate, serrate, petioled ; stem erect; spikes whorled, crowded; 

 bracts longer than the calyx. Var. virginicwn, upper leaves sub- 

 sessile; bracts about the length of the calyx. 1 3. f. 



131. THYMUS. (From tkumos, force.) 

 Exotic. 



Vut.ga'ria t (thyme, b-p. J. 7|., Tj) erect; leaves ovate and linear, revo- 

 lute ; flowers in a whorled spike. 



61. TRADESCANTIA. (From Tradescani, a botanist.) 



Virgini'ca, (spider wort. b-p. M. 7|.) erect, branching ; leaves lanceo- 

 late, elongated, glabrous* flowers sessile; umbel-compact pubescent 

 Cultivated. 12. f. 



1610. TRIFOLIUM. (From ires, 3, and folium, a leaf.) 



Re'pens, (white clover. O. w. M. QJ.) creeping; leafets ovate-oblong, 

 emarginate, serrulate ; flower in umbelled heads ; teeth of the calyx 

 sub-equal ; legumes 4-seeded. 



Pratcn"se, (red clover. O. r. M. Tj.) 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. 23. f. 



63. TRILLIUM. (From trilix, triple.) 



J3?ec"tum, (false wake robin. O. p. w-y. 1\) peduncles erect or erectish, 

 with the flowers a little nodding ; petals ovate, acuminate, spreading ; 

 equalling the calyx ; leaves rhomboid, acuminate, sessile. Var. atro- 

 purpureum, petals large, dark purple. Var. album, petals smaller, 

 white ; germ red. Var. flavum, petals yellow ; both petals and calyx 

 leaves longer and narrower. 12 to 18 inches high. Leaves often 

 to 4 inches broad. Peduncles about 3 inches long. 9 16. i. 



32. TRITICUM. (From tero, to beat or thresh.) 

 Exotic. 



Hyber"num, (winter wheat. J. tf) calyx glume 4-flowered, tumid, even 

 'imbricate, abrupt, with a short compressed point ; stipule jagged ; co- 

 rollas of the upper florets somewhat beard'.d. There are se7f ra 

 VH-ieties of this species which are introduced by culture. 



