KANUNCULACE^E. (CROWFOOT FAMILY.) 9 



broad subulate beaks. R. repens, var. macranthus, Gray. In the Uinta Moun- 

 taius, and from Oregon to Nevada and Texas. The largest of the genus 

 sometimes reaching a height of 5 feet. 



20. R. Nuttallii, Gray. Smooth, 6 to 8 inches high : radical leaves bi-ter- 

 nately divided, segments 3 to 5-parted, lobes oblong or linear, sometimes 2 to 

 3-cleft : petals spatulate, a little longer than the broader sepals which are also 

 yellow : akenes rather few, in a globose head, cylindrical-oblong, grooved, many- 

 nerved, tipped with a long, slender, incurved style. Colorado and "Wyoming, 

 along the eastern foothills. 



21. R. multifldus, Pursh. Stems floating or immersed, with the divisions 

 of the leaves long and filiform ; or rooting in the mud and the leaves round- 

 reniform and more or less deeply lobed and toothed: petioles short, broadly 

 stipulate-dilated at base : flowers large, the petals with conspicuous obovate scales : 

 akenes in a small globose head, beaked by a short straight style. Colorado 

 and northward, and across the continent. 



i- )- -- H- Leaves pinnately divided. 



22. R. orthorhyncus, Hook. More or less villous, the stems often 

 slender, 1 or 2 feet high : divisions of the leaves variously lobed and cut, the 

 segments often narrow : sepals reflexed : petals bright yellow or purple-tinged 

 outside : akenes large, flattened, in a close globose head, with aslcndcr straight 

 beak ns long as the ovary. In the Bitter-root Mountains, northward and 

 westward. 



6. C ALT HA, L. MARSH MARIGOLD. 



Sepals 5 to 12, deciduous. Pods each with several seeds, and when ripen- 

 ing spreading and flattened. Glabrous perennial herbs, easily recognized by 

 their undivided leaves and showy petal-like sepals. 



1. C. leptosepala, DC. Leaves round- to oblong-ovate (longer than 

 broad), with a somewhat narrowed and quadrate base, usually very obscurely 

 crenate above and rather coarsely and often acutely serrate below : flowers 

 solitary, very rarely 2, the second flower subtended by a pctioled leaf: sepals 

 white or often tinged with blue. Prom New Mexico to Alaska. An excel- 

 lent pot-herb. 



7. TROLL I US, L. GLOUE-FLOWER. 



Sepals 5 to 15, petal-like. Pods sessile, many-seeded. Smooth perennials, 

 with large solitary terminal flowers and palmately parted and cut leaves. 



1. T. laxus, Salisb. Flowers pale greenish-yellow or nearly white: 

 petals much shorter than the stamens. Associated with the preceding, but 

 less common. 



Var. albiflorus, Gray. Stem 6 to 12 inches high, and flowers white. 

 Near snow-banks. " The pure Avhite and broader sepals, lower stature, and 

 alpine station, distinguish this from the ordinary form," Colorado, Parry. 



8. A QU I LEG I A, L. COLUMBINE. 



Sepals 5, regular, colored like the petals. Petals all alike, with a short 

 spreading lip. Pods erect, ma.iy-seeded. Perennials, Avith the leaflets of the 

 2 to 3 ternately compound leaves lobed. Recognized by its large showy 

 flowers and prominent spurs. 



