CROWFOOT FAMILY 93 



Spur 4—5 cm. long; sepals less than 2 cm. long, ovate-lanceolate, acute; 



follicles strongly curved outward. 18. A. thalictrifolia. 



Spur 5—7 cm. long; sepals 2-4 cm. long, lanceolate to ovate-lanceolate, 



acuminate; follicles almost straight. 19. A. chrysantha. 



21. DELPHINIUM (Toum.) L. Larkspur. 



A. Carpels and follicles 3, rarely 4 or 5. 



I. Pedicels erect or nearly so. 



a. Sepals white or merely tinged with blue or with a blue spot; follicles more than 



1 cm. long, about four times as long as broad; seeds squamellate. (I. 



Cakoliniana.) 

 Lobes of the lateral petals divergent; lower pedicels elongate; spur mostly 



erect; stem strigose-canescent throughout. 1. D. Penardii. 



Lobes of the lateral petals not divergent; lower pedicels not elongate; spur 



mostly horizontal; stem usually glabrous below, viscid above. 



2. D. mrescens. 



b. Sepals dark blue; follicles less than 1 cm. long, only 2-3 times as long as broad; 



seeds not squamellate, but wing-margined. (II. Stbicta.) 

 Lower petals blue and bearded; perennials with fsisciculate tuberous roots. 

 Stem glabrous below. 



Stem glabrous throughout; pedicels equalling or exceeding the sj^ur. 

 Leaves pubescent; folUcles glabrous. 27. D. Brownii. 



Leaves glabrous and glaucous; follicles strigose. 



25. D. elongatum. 

 Stem puberulent above ; follicles vlscld-vlllous. 



Pedicels shorter than the spurs. 3. D. distichum. 



Pedicels longer than the spurs. 4. D. megacarpum. 



Stem more or less pubescent throughout, finely so below, viscid above. 

 Spur with reflexed tip; upper petals with a lanceolate, 2-cleft apex; 



inflorescence appressed-pubescent. 5. D. simplex. 



Spur straight; upper petals with an obliquely ovate-triangular apex, 

 slightly 2-tootned; inflorescence villous. 6. D. cyanoreios. 



Lower petals white; roots fleshy, fusiform. 



Stem leafy throughout, viscid. 7. D. diversicolor. 



Stem leafy only at the base, glabrous below. 8. D, Burkei. 



II. Pedicels ascending or spreading. 



a. Irrfloresceuce 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 ttie lower blue; pod straight. 9. D. Helleri. 



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

 FolUcles 1.5-2 cm. long, more or less arcuate, the upper portion divergent. 

 Boots 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 sUghtly longer than the acute lateral sepals. 



11. D. bicolor. 

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



nun. 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-Uke. 

 Segments of the leaves al! 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 scamform. 



18. D. scaposum. 

 FolUcles strigose; stem leafy. 19. D. xylorhizum. 



2. Segments of aU the leaves acute or acuminate. 

 a. Plant not aU viscid. 



* FolUcles pubescent. (V. Robusta.) 

 ^ Stem grayish .strigose throughout. 



Leaves divided into cuneate, merely cleft, segments. 



20. D. geranifolium. 

 Leaves repeatedly divided Into Unear lobes. 



Stem 3—5 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 cespltose, 2-4 dm. bigh. 34. D. glaucescens. 



Plant not cespltose, 5-20 dm. high. 



Inflorescence dense; foUicles scarcely at all arcuate. 



