CROWFOOT FAMILY 



309 



19. D. xylorhizum. 



B. 



II. Pedicels ascending or spreading. 



a. Inflorescence few-flowered; the lower pedicels elongate; sepals broad, spread- 



ing, dark blue; leaf-segments narrow; root short and thickened, often 

 tuber-like. (III. BICOLORIA.) 



Upper petals as well as the lower blue; pod straight. 9. D. Helleri. 



Upper petals white or yellowish, only veined with blue, the lower mostly blue. 

 Follicles 1 .5-2 cm. long, more or less arcuate, the upper portion divergent. 

 Roots fascicled, thick, but not tuber-like; stem usually viscid, at least 



above; blades of the lateral petals about 10 mm. long. 

 Spur fully half longer than the obtuse lateral sepals. 



10. D. Leonardi. 

 Spur only slightly longer than the acute lateral sepals. 



11. D. bicolor. 

 Roots tuber-like; stem not viscid; blades of the lateral petals about 5 



mm. long. 



Stem with long, soft reflexed hairs. 12. D. Menziesii. 



Stem appressed-strigose or glabrous. 



Flowers dark blue. 13. D. Nelsonii. 



Flowers light blue. 14. D. dumetorum. 



Follicles less than 1 cm. long, only the tips divergent; stem strigose; root 



tuber-like. 



Segments of the leaves all narrow. 15. D. Nuttallianum. 



Segments of the basal leaves oblong to cuneate. 16. D. depauperatum. 



b. Lower pedicels not elongate; plant with a long woody taproot or a rootstock. 



1. Segments of the basal leaves obtuse, mucronate. (IV. SCAPOSA.) 



Sepals light blue; lobes of the first basal leaves linear-oblong; spur a little 



longer than the upper petals. 17. D. coelestinum. 



Sepals dark blue; lobes of the first basal leaves rounded to oblong; spur 



nearly twice as long as the upper petals. 

 Follicles glabrous or sparingly viscid; stem usually scapiform. 



18. D. scaposum. 

 Follicles strigose; stem leafy. 



2. Segments of all the leaves acute or acuminate. 



a. Plant not all viscid. 



* Follicles pubescent. (V. ROBUSTA.) 

 Stem grayish strigose throughout. 



Leaves divided into cuneate, merely cleft, segments. 



20. D. geranifolium. 

 Leaves repeatedly divided into linear lobes. 



Stem 35 dm. high; bractlets oblong, close under the calyx. 



21. D. Geyeri. 

 Stem 5-20 dm. high; bractlets subulate, 2-3 mm. below the 



calyx. 24. D. robustum. 



Stem glabrous and glaucous, at least below. 



Plant cespitose, 2-4 dm. high. 34. D. glaucescens. 



Plant not cespitose, 5-20 dm. high. 



Inflorescence dense; follicles scarcely at all arcuate. 



Leaf-segments 3-7, broad, cuneate, merely cleft into 



broadly lanceolate lobes. 

 Sepals yellowish white or light blue. 



22. D. cucullatum. 

 Sepals dark blue. 23. D. canmorense. 



Leaf-segments narrow, repeatedly dissected into linear 

 or linear-lanceolate divisions. 



Inflorescence paniculate, strigose-puberulent; leaf- 

 segments linear. 24. D. robustum. 



Inflorescence racemose, simple, glabrous or nearly so; 

 leaf-segments narrowly lanceolate. 



25. D. elongatum. 

 Inflorescence lax; follicles strongly arcuate. 



26. D. ramosum. 

 ** Follicles glabrous. (VI. GLAUCA.) 27. D. Brownii. 



b. Plant more or less viscid, especially the pedicels. 

 * Plant tall, 4-20 dm. high, not cespitose. 



Leaves dissected into linear lobes; follicles densely strigose. (VII. 



VISCIDA.) 28. D. viscidum. 



Leaves divided into cuneate or rhomboid, merely cleft, divisions. 

 Follicles viscid-pubescent. (VIII. OCCIDENTALJA.) 



Flowers light blue, or yellowish, tinged with blue or purple. 



29. D. multiflorum. 

 Flowers dark blue. 



Follicles glabrous. (IX. SUBALPINA.) 

 Sepals obtuse. 

 Sepals acute or acuminate. 



Sepals at most equalling the spur. 32. D. Barbeyi. 

 Sepals much longer than the spur. 33. D. attenuatum. 

 ** Plant less than 4 dm. high, cespitose. (X. ALPESTRIA.) 



Stem 2-4 dm. high, puberulent or glabrous. 34. D. glaucescens. 

 Stem about 1 dm. high, viscid-pubescent. 35. D. alpesire. 



Carpels and follicles solitary; petals 2, united. (XI. CONSOLTDAE.) 



36. D. Ajacis. 



30. D. occidentale. 



31. D. reticulatum. 



