CROWFOOT FAMILY 313 



cleft divisions; inflorescence many flowered and usually branched; sepals dark 

 blue, oval, obtuse or the upi)er acute, viscid outside; upper petals yellowish, 

 tinged with blue, obtuse, entire; lower sepals with broad acute sinuate lobes; 

 follicles about 15 mm. long, straight. D. quercetorum Greene. Higher moun- 

 tains: Ida. — ^Utah — -Colo. — -Wyo. Mont. — Subalp. Jl-Au. 



31. D. reticulatum (A. Nels.) Rydb. Stem 6-12 dm. high, glabrous and 

 glaucous below; leaf-blades 8-10 cm. broad, pubescent, divided into 3-5 broadly 

 cimeate, 3-cleft, toothed divisions; inflorescence mostly simple; sepals usually 

 dark blue, often streaked with yellow, viscid-villous outside; upper petals usually 

 blue, variegated with yellow; lower petals with acutish sinuate lobes; follicles 

 fully 1 cm. long, straight. Moist glades and open woods: Ida. — Wyo. — Colo. 

 Subinont. — Mont. Jl-Au. 



32. D, Barbeyi Huth. Stem 3-10 dm. high, stout, usually pubescent through- 

 out; leaf-blades 7-15 cm. broad, pubescent; divided or cleft into about 5 vari- 

 ously cleft divisions; inflorescence short and dense; sepals dark blue, acuminate, 

 viscid-pubescent with yellowish hairs; upper petals yellow, tinged with blue; 

 lower petals with broad acute sinuate lobes. D. subalpinum (A. Gray) A. Nels. 

 Grassy parks and open woods: Wyo. — -Colo. — -Utah. Mont. — -Alp. Jl-Au. 



33. D. attenuatum (M. E. Jones) Rydb. Closely related to the preceding, 

 but the raceme compound, resembling D. glaucum in leaf-form; stem about 1 m. 

 high; sepals dark blue, long-attenuate, about 25 mm. long and about 3 times as 

 long as the petals, nearly glabrous; upper petals white and veiny, the lower light 

 blue. Along brooks: Utah. Subalp. Jl-Au. 



34. D. glaucescens Rydb. Stems 3-5 dm. high, from a thick cespitose 

 caudex; leaf-blades 5-7 cm. wide, finely puberulent, divided into 5-8 cuneate 

 divisions, these 3-cleft, with lanceolate lobes; raceme simple, short; sepals dark 

 blue, oval, obtuse, about 1 cm. long; upper petals yellowish white, tipped and 

 variegated with blue; lower petals dark blue, with short acute lobes; ovary densely 

 pubescent. Among rocks: Mont. — Ida. — Wyo. Subalp. Jl-Au. 



35. D. alpestre Rydb. Stems several, about 1 dm. high, puberulent and 

 viscid above, densely leafy; leaf -blades digitately divided into about 5 divisions, 

 finely and sparingly puberulent when young, dark green; divisions cuneate-obo- 

 vate, divided half-way into oblong mucronate lobes; inflorescence short and few- 

 flowered; sepals dark blue, oblong, obtuse or the upper acute, viscid-puberulent; 

 upper petals blue and yellowish; lower petals 2-cleft; lobes lanceolate; foUicles 

 viscid-puberulent. Among rocks: Colo. — N.M. Alp. Jl. 



36. D. Ajacis L. Annual; stem erect, 3-7 dm. high, branched, glabrous 

 below, viscid-puberulent above; leaf -blades glabrous, finely dissected into nar- 

 rowly linear lobes; flowers blue or purple, rarely white; sepals obovate, 1-1.5 

 cm. long, slightly p\ibescent; follicles 12-15 mm. long, pubescent, with a very 

 short beak. Around dwellings: N.Y. — Va. — Tex.— Mont.; cultivated and 

 escaped from gardens. 



22. ACONITUM L. Aconite, Monkshood, Wolfsbane. 



Perennial herbs, with rootstocks or tubers. Leaves alternate; blades pal- 

 mately lobed or divided. Flowers large, perfect, irregular, zygomorphic. Sepals 

 5, the upper or posterior one hooded or helmet-shaped. Petals 2-5, small, the 

 posterior two hooded, clawed, concealed in the posterior sepal, the other three 

 when present minute. Stamens niunerous, hypogj'nous. Pistils 3-5, sessile, 

 many-ovuled. Fruit many-seeded follicles. 



Hood boat-shaped, slightly saccate, almost semicircular in outline; stem slender, scarcely 

 more than 3 dm. high: perennials with tubers. 

 Ultimate divisions of the basal leaves linear, linear -oblong, or linear-lanceolate. 



1. ^. tenue. 

 Ultimate divisions of the basal leaves lanceolate. 2. A. delphinifolius. 



Hood helmet-shaped, deeply saccate; stem stout, 4-10 dm. high; root fleshy, usually 

 fusiform. 

 Stem, at least the upper portion, viscid-pubescent. 



Primary divisions of the leaves cleft or toothed; upper end of pedicels not glabrous. 

 Front-line of the hood strongly concave, i. e., the beak porrect, almost hori- 

 zontal. 



14* 



