Alpini. 131 



ALPINI 6. 



Pods papery, variously inflated, rarely large, on slender 

 pedicels stipitate and pendeijt (erect in the first group), rather 

 few-seeded in the middle, opening throughout the ventral sut- 

 ure ; with ventral suture the more arched in young pods or 

 when rarely concave in A. andinus in mature pods the tip 

 is declined ; with dorsal suture a mere thickened edge within 

 or a little produced as a papery partial partition, the body 

 rather oblique but nearly straight. Flowers small (about 1.5 

 cm. long in A. Gormani and the alpinus group). Stipules 

 green and conspicuous (hyaline in A. Gormani), veiny, large 

 or foliose, not connate (rarely so in A. andinus, free in A. Gor- 

 mani), longer above on the stems, very broad near the root. 

 Stem leaves fully or almost sessile (short-petioled in the A. al- 

 pinus group), with several pairs of thin, flat, rather narrow, 

 green, and mostly obtuse leaflets. Plants blooming in sum- 

 mer and growing in high and cold mountains and mountain 

 yalleys. Phaca. 



KEY 



A. Pods apparently sessile. Flowers in long racemes. Bracts tri- 

 angular-subulate with thread-like tips, 3-7 mm. long. Leaves about 

 sessile, about 1 dm. long, with 6-8 pairs of nearly linear leaflets 

 cuneate at base and about 2 cm. long and rarely 5 mm. wide, 

 and long-petiolulate. Peduncles elongated and strict, much longer 

 than the leaves, and with rachis about half the peduncle. 

 Pods erect and appressed. Arctic. 84 Gormani. 



Pods pendent. Subalpine. 85 elegans. 



2A. Pods conspicuously stipitate and pendent, appearing almost sessile 

 in some cases in A. Labradoricjs var. occidentalis. 

 2AB. Stipules not very large nor leaf-like, acuminate above. Bracts 

 small, and acuminate. Peduncles longer than the leaves. Flow- 

 ers with purple-tipped keel, and mostly purple tinged above, not 

 over 1 cm. long. Young pods inclined to be nigrescent. Calyx 

 teeth triangular to subulate often as long as tube. Pods dis- 

 tinctly laterally flattened when mature, not sulcate or only 

 slightly so, the dorsal suture intruded as a partial partition, but 

 rarely 1 mm. high. The ventral suture greatly arched and the 

 dorsal about straight. Flowers in long racemes (except in A. 

 Cottoni). A. arcticus and oroboides are near this group. 

 Pods narrow, 1-2 cm. long. Flowers stubby. Leaflets broad and not 

 congested. Leaves 4-7 cm. long. Pubescence almost none. 



86 Labradoricus 

 Pods about half-oval. 2-2.5 cm. long. Flowers not stubby. Leaflets 

 narrow, mostly congested. Leaves 4-10 cm. long. Pubescence 

 minute or none. 87 aboriginum. 



Pods 2.5 cm. long, half-oval. Flowers not stubby. Leaflets ellintical. 

 Leaves closely sessile, woolly. 88 Cottoni 



