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 (Tourn.) L. L.^rkspur. 



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. 



Caeoliniana.) 

 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. virescens. 



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. Stricta.^ 

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

 Stem glabrous below. 



Stem glabrous throughout; pedicels equalling or exceeding the spur. 

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



Leaves glabrous and glaucous; follicles strigose. 



25. D. elongalum. 

 Stem puberiilent above; follicles viscid- villous. 



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. 

 Spiir wth refle.xed 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-toothed; inflorescence villous. 6. D. cyanoreios. 



Lower petals wMte; roots fleshy, fusiform. 



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



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



II. Pedicels ascendiirg or spreading. 



a. Infloi-escence 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, onl.v veined with blue, the lower mostly blue. 

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

 Roots fascicled, tliick, 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. dumelorum. 



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

 tuber-like. 

 Segments of th" leaves al! narrow. 15. D. Nultallianum. 



Segments of the basal leaves oblong to cimeate. 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. coclestinum. 



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

 nearly twice as long as the upper petals. 

 Follicles glabrous or sparhigly viscid; stem usually scapiform. 



18. D. scaposum. 

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



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 3-5 dm. high; bractlets oblong, close under the calyx. 



21. D. Geyeri 



Stem 5-20 dra. 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. 



Plaot not cespitose, 5-20 dm. high. 



Inflorescence dense; follicles scarcely at all arcuate. 



