102 
LEGUMTNOSAE 
Margins of involucre lobed and toothed ; calyx-teeth not dilated. 
Flowers small, enclosed within 1 or 2 involucres.. 
12. T. variegatum. 
Flowers large, each floral whorl subtended by an involucre. 
13. T. involucratum. 
Corolla conspicuously inflated in age. the petals withering-connivent by their 
tips and forming a bladder-like sac to the growing pod. 
Involucre large, lobes lanceolate.14. T. fucatum. 
Involucre small, lobes obtusely rounded..15. T. amplsctens. 
Involucre reduced to a ring.16. T. depauperatiim. 
1. T. albopurpureum T. & G. Stems ascending or erect, 9.6 to 33 cm. 
high; leaflets oblong-obovate, denticulate toward the apex; heads ovate, 
6 to 16 mm. high, on long slender peduncles; corolla purple, white-tipped. 
—Lower hills. 
2. T. dichotomum H. & A. Similar to no. 1; stems dichotomously 
branching; heads cylindrical, 1.6 to 2 cm. long, mostly with turbinate 
base.—Hills at middle altitudes. 
3. T. ciliatum Benth. Jaybird Clover. Plants erect, 2 to 4 dm. 
high, glabrous; leaflets cuneate-oblong to obovate, serrulate, 1 to 2.4 cm. 
long; flowers whitish or purplish: calyx-teeth lanceolate, rigidly cilio- 
late; pod 1-seeded.—Plains, valleys and low hills. 
4. T. gracilentum T. & G. Pin-point Clover. Plants erect, 2.4 to 
3.8 dm. high, wholly glabrous; rachis often prolonged through heads 
as a sterile point: corolla reddish or deep purple, the ends of the petals 
more or less white-tipped: pod 2-seeded.—Valleys and low hills. 
5. T. bifidum Gray. Plants slender, pale green and glaucous, gla¬ 
brous, or hairy only on the petioles and peduncles; leaflets linear to 
obovate, bifid at apex, with a rnucro in the notch; flowers pale pink; pod 
1-seeded.—Hills and valleys. Var. decipiens Greene. Leaflets less not¬ 
ched; calyx often hairy. 
6. T. repens L. White Clover. Plant low, creeping: leaves long- 
petioled; leaflets obcordate and obscurely toothed; heads long-peduncled 
from the ground; flowers white.—Lawns and pastures; cult, from Eur. 
7. T. hybridum L. Alsike Clover. Stems ascending or nearly erect, 
2.8 to 8.6 dm. high; leaflets obovate, serrulate; heads small, loose, nearly 
globular; flowers rose-color, or white on top of head.—Moist lands, nat. 
from Eur. 
8. T. pratense L. Red Clover. Stems ascending, 3 to 4 dm. high; 
somewhat hairy; leaflets oval or obovate, sometimes notched at the 
end, marked with a large spot; heads globular, ovate, sessile; flowers 
red-purple.—Cult, from Eur. 
9. T. microdon H. & A. Stems stoutish, erect or decumbent; herbage 
faintly pubescent; leaflets broadly obcordate, serrulate, 1.2 cm. long; 
heads 8 mm. broad; involucre 12 to 15-lobed, the lobes 3 to several¬ 
toothed and spreading abruptly from the head after the flowering period; 
corolla white, fading pinkish.—Valleys and plains. 
10. T. microcephalum Pursh. Stems slender, erect or decumbent; 
herbage soft-pubescent; leaflets obovate, serrulate, notched at apex; heads 
6 mm. broad; involucre about 9-lobed, the lobes erect, acuminate, cus¬ 
pidate, entire; corolla white or rose-color.—Hillsides and valleys. 
11. T. tridentatum Lindl. Stems mostly erect, 2 to 5 dm. high; leaflets 
