PEA FAMILY 471 



Upper leaflets lanceolate, acuminate; flowers about 1 cm. long. 



18. T. Kingii. 

 VI. REPENTIA. 



Plant ascending; corolla rose or pink, rarely white. 19. T. hybridum. 



Plant creeping; corolla white or tinged with pink. 20. T. repens. 



VII. NANA. 



Heads 1-3-flowered; flowers not reflexed; calyx-teeth lanceolate; caudex thick, densely 

 cespitose, with short branches. 21. T. nanum. 



Heads several-flowered; flowers reflexed; calyx-teeth subulate; branches of the caudex 



more slender and elongate. 



Corolla purple, 15-20 mm. long. 22. T. Brandegei. 



Corolla white or light rose, 10-15 mm. long. 23. T. Haydenii. 



VIII. GYMNOCARPA. 



Flowers 10-12 mm. long. 24. T. subacaulescens. 



Flowers about 8 mm. long. 25. T. gymnocarpon. 



IX. DASYPHYLLA. 



Flowers reflexed in fruit; bracts minute, truncate and toothed. 



Calyx two-thirds to three-fourths as long as the corolla, its teeth fully twice as long 



as the tube. 26. T. stenolobum. 



Calyx about half as long as the corolla, its teeth only slightly longer than the tube. 

 Banner acuminate; leaflets linear-lanceolate. 27. T. attenuatum. 



Banner obtuse, minutely mucronate; leaflets oblong-lanceolate to elliptic. 



28. T. bracteolatum. 



Flowers not reflexed in fruit; bracts more conspicuous, lanceolate to subulate, long- 

 attenuate, except in the first species. 



Leaves as well as the whole plant densely silvery- white. 29. T. anemophilum. 



Leaves green or brown, though somewhat silky. 



Bracts narrow, 1 -nerved; leaflets broadest at or below the middle. 



Calyx-teeth only slightly longer than the tube; bracts glabrous, much exceed- 

 ing the calyx-tube. 30. T. lividum. 

 Calyx-teeth fully twice as long as the tube; bracts pubescent, slightly if any 



exceeding the calyx-tube. 

 Banner white or ochroleucous, merely tinged with purple; wings and keel 



dark purple; pubescence rather loose. 31. T. dasyphyllum. 



Banner as well as the other petals reddish purple; pubescence appressed. 



32. T. scariosum. 

 Bracts broader, 3-nerved; leaflets broader above the middle. 



33. T. uintense. 

 X. ANDINA. 



One species. 34. T. andinum. 



XL PARRYANA. 

 Banner long-acute, much exceeding the wings; bracts ovate, exceeding the calyx, strongly 



purple-veined. 35. T. salictorum. 



Banner blunt, slightly exceeding the wings. 



Calyx-teeth only slightly unequal; bracts exceeding the calyces; upper stipules broadly 



obovate. 36. T. Parryi. 



Upper calyx- teeth much shorter than the lower; bracts not exceeding the calyces; 



upper stipules ovate. 



Peduncles 1-2 dm. long; bracts ovate. 37. T. inaequale. 



Peduncles less than 1 dm. long; bracts obovate in outline. 38. T. montanense. 



XII. INVOLUCRATA. 



Perennials. 



Banner white; wings and keel tipped with dark purple; calyx-teeth twice as long as 



the tube. 39. T. spinulosum. 



Banner as well as the other petals purple; calyx-teeth a little longer than the tube. 

 Corolla 12-15 mm. long; involucres to about the middle. 40. T. Fendleri. 

 Corolla about 10 mm. long; involucres cleft to below the middle. 



41. T. oxydon. 

 Annuals. 



Involucres much shorter than the flowers, not scarious; teeth long. 

 Leaflets obovate or elliptic. 



Flowers 7-8 mm. long. 42. T. variegntum. 



Flowers more than 1 cm. long. 43. T. subsalinum. 



Leaflets linear. 44. T. oliqanthum. 



Involucres almost equalling the flowers, scarious at least below, its teeth short or 



none. 

 Involucres glabrous, 8-10 mm. high, its lobes toothed; calyx-teeth ternately 



divided, with setiform branches. 45. T. cyanthiferum. 



Involucres hairy, 5-7 mm. high, its lobes entire; calyx-teeth simple. 



46. T. microcephalum. 



XIII. AGRARIA. 

 One species. 47. T.procumbens. 



