CROWFOOT FAMILY 305 



Filaments whitish; raceme short; pedicels in fruit 1-3 cm. long. 



Fruit white, ellipsoid, 9-12 mm. long. 1. A. eburnca. 

 Fruit red. 



Fruit ellipsoid, 10-12 mm. long. 2. A. rubra. 



Fruit spherical or nearly so, 5-7 mm. long. 3. A. arguta. 

 Filaments greenish; raceme elongate; pedicels very short, even in fruit less than 1 cm. 



long; fruit red. 4. A. viridiflora. 



1. A. eburnea Rydb. Stem 6-10 dm. high, glabrate or villous-puberulent 

 above; leaves ternate or twice ternate, the divisions pinnate; leaflets ovate, usually 

 3-5-lobed, and sharply serrate; pedicels slender; sepals orbicular, early deciduous; 

 petals narrowly rhombic-spatulate, acute; fruit about 12-seeded; seeds obliquely 

 pear-shaped, about 4 mm. long. In rich woods: B.C. Ore. Utah Colo. 

 S.D.; n N:Y. Newf. Submont.Mont. My-Je. 



2. A. rubra (Ait.) Willd. Like the preceding, but lower, 3-6 dm. high; 

 leaflets shorter and broader, firmer, darker, acute or short-acuminate; teeth 

 coarser, less sharp; pedicels more divaricate; petals spatulate, acute; seeds about 

 3 mm. long. Rich woods: N.S. N.J. la. 'Mont. Alta. Boreal Mont. 

 My-Je. 



3. A. arguta Nutt. Very similar to A. eburnea in habit, fully as tall; 

 leaflets very thin and light green, long-acuminate and very sharply toothed; 

 sepals with long claws and rhombic acute blades; seeds about 10, about 3 mm. 

 long. Woods: Alaska Calif. N.M.S.D.Alta. Submont.Mont. My-Je. 



4. A. viridiflora Greene. Stems usually several from the rootstock, fully 

 as tall as in the preceding; leaflets darker green, ovate-lanceolate, more regularly 

 toothed, more pubescent when young; petals clawed; blades ovate, obovate or 

 lanceolate, usually greenish; fruit red, 10-12-seeded. A. multicaulis Greene. 

 Rocky woods: Ariz. Colo. N.M. Submont. Mont. Je-Jl. 



20. AQUILEGIA (Tourn.) L. COLUMBINE. 



Perennial herbs, with rootstocks and branching stems. Leaves basal and 

 cauline, ternately decompound. Flowers perfect, usually large and showy, 

 regular. Sepals 5, petal-like, deciduous. Petals concave, produced below into 

 a hollow spar, or at least saccate. Stamens numerous, the inner reduced to 

 staminodia; filaments more or less flattened. Pistils 5, sessile, many-ovuled. 

 Fruit follicles, many-seeded, with slender styles. Seeds numerous, smooth and 

 shining, with a hard coat. 



Plant very low; stem scapiform and 1-flowered; spur curved; flower blue or purple. 



1. A. Jonesii. 

 Stem more or less leafy. 



Petals merely saccate, not spurred at the base; terminal leaflet rhombic, acute. 



2. A. Eastwoodiae. 

 Petals spurred; all leaflets obtuse. 



Lamina of the petals longer than the strongly curved spurs, truncate. 



Stems many times exceeding the basal leaves; styles in fruit about one-fourth 



as long as the follicles. 3. A. brevistyla. 



Stem only slightly exceeding the basal leaves; styles in fruit about half as long 



as the follicles. 



Plant perfectly glabrous; flowers blue. 4. A. saximontana . 



Peduncles and follicles sparingly hairy; flowers sulphur-yellow or greenish. 



5. A. larimiensis. 

 Lamina of the petals shorter than the slightly curved or straight spurs. 



Spur not over 2 cm. long; flowers nodding. 



Sepals and spurs red; spur usually straight (except in Xo. 9). 



Lamina of the petals small, less than 4 mm. long or none; sepals spread- 

 ing or reflexed. 

 Sepals 1015 mm. long, shorter than or rarely equalling the spurs. 



6. A. truncata. 

 Sepals 15-25 mm. long, exceeding the spurs. 7. A. columbiana. 



Lamina of the petals 6-12 mm. long. 



Sepals spreading or reflexed, longer than the spurs. 8. A. formosa. 

 Sepals ascending, usually shorter than the spiirs. 



Sepals much longer than the lamina of the petals; spur incurved. 



9. A. latiuscula. 

 Sepals equalling or little exceeding the lamina of the petals; 



spur straight. 

 Spur gradually tapering to the apex; follicles glabrous. 



10. A. rubicunda. 



14 



