B^IGWORT FAMILY 215 



Bracts crimson ; leaves glabrous or nearly so. 24. C. Vreelandii. 



Corolla 3 cm. long or less. 



Calyx and upper part of the stem densely wliite-villou.s. 25. C. trinervis. 

 Calyx and upper part of the stem sparingly hlrsute-villous. 



Plants growing more or less in clumps, with a short caudex. 

 Corolla 2-3 cm. long: bracts usually more or less crimson. 

 Plant tall, 4-6 cm. high; calyx-lobes acute or acuminate. 



Galea 15-18 mm. long. 13. C. confusa. 



Galea about 10 mm. long. 26. C. Tweedyi. 



Plant low, 1-3 dm. high; calyx-lobes obtuse. 27. C. subpurpurascens. 



Corolla less than 2 cm. long; bracts brick-red. 28. C. mineata. 



Plants with solitary stems from horizontal or ascending rootstocks. 



29. C. lancifolia. 

 IX. HISPIDAE. 



Calyx-lobes rounded at the apex; bracts purplish, much exceeding the flowers. 



30. C. obtusiloba. 

 Calyx-lobes acute or rarely obtuse at the apex; bracts if at all only slightly exceeding the 



flowers. 

 Corolla about 4 cm. long. 



Plant simple, with a horizontal rootstock; galea longer than the corolla-tube. 



31. C. Suksdorfii. 

 Plant cespitose, with a short caudex; galea not longer than the corolla-tube. 



13. C. confusa. 

 Corolla 1.5—3 cm. long; plant more or less cespitose, with a short caudex. 

 Stem more or less pubescent, 3-6 dm. high. 



Lobes of the calyces and bracts lanceolate or oblong; bracts usually crimson. 

 Body of the leaves lanceolate; lobes directed forward. 



Plant decidedly glandular- or viscid-pubescent. 32. C viscida. 

 Plant scarcely viscid, but puberulent and hirsute. 



Corolla much exceeding the bracts; galea equalling or exceeding the 



tube. 33. C. amplifolia. 



Corolla slightly if at all exceeding the bracts; galea snorter than the 

 tube. 

 Bracts with very short lobes or merely toothed: stem sparingly 



hirsute or merely pubenilent. 34. C. Bradburyi. 



Bracts with long narrow lobes; stem copiously hirsute. 



35. C. hispida. 

 Body of the leaves linear, 'the lobes linear, divergent. 



Galea shorter than the corolla-tube. 36. C. angustifolii. 



Galea longer than the corolla-tube. 37. C chromosa. 



Lobes of the calyces and bracts narrowly linear; bracts brick-red. 



38. C. linearis. 

 Stem glabrous up to the inflorescence, 1-2 dm. high. 39. C. Haydeni 



X. Pallidae. 

 Upper leaves long-acuminate, caudate-falcate. 



Stem up to the inflorescence aad leaves puberulent or glabrate. 



40. C. pallida. 

 Stem and leaves pilose. 41. C. Cusickii. 



Upper leaves neither caudate, nor falcate. 



Bracts not pale-yellow; corolla usually less than 2 cm. long. 

 Stem slender, 2—4 dm. high; bracts rose or brownish. 



Stems from a rootstock, sparingly villous. 42. C. gracillima. 



Stems from a caudex, hirsutulous, or villous in the inflorescence. 



43. C. Bennittii. 

 Stem 0.5-2 dm. high, fiom a cespitose caudex. 



Bracts puberuleiit, dark brownish scarlet. 44. C. parvula. 



Bracts villous, varying from light brownish crimson to greenish yellow. 



45. C. occidenialis. 

 Bracts pale yellow; corolla usually over 2 cm. long, except in the first. 



.Plant 0.5-2 dm. high, densely vUlous above. 45. C. occidenialis. 



Plant 2-4 dm. high, slightly if at all villous in the inflorescence. 



Stems solitary from a creeping rootstock; coroUa usually margined with yellow; 



plant darkening in drying. 46. C. luteovirens. 



Stems growing in clumps, with a short caudex; plant rarely darkening in dry- 

 ing. 

 Upper leaves broadly lanceolate or ovate; all leaves 3-ribbed. 



47. C. sulphurea. 

 Leaves all Unear,. 1-ribbed, or the uppermost linear-lanceolate and indis- 

 tinctly 3-ribbed. 48. C. wyomingensis. 



XL LtTTEAE. 



Plant seldom over 1 dm. high; bracts green or tinged with brownish rose; calyx with 

 short obtuse lobes. 

 Stem less than 2 dm. high, sparingly villous; bracts tinged with brown. 



49. C. pulchella. 

 Stem 2—3 dm. high, hirsutulous: bracts tinged with rose. 43. C. Bennittii. 

 Plant 2—4 dm. high: bracts pale yellow. 



Stems villous: leaves lanceolate. • 50. C. lutea. 



Stems pilose: leaves linear or lance-Unear. 41. C. Cusickii. 



XII. LINBATAE. 



One species. 51. C. lineata. 



