136 Alpini. 
lacerate edge, 1 mm. wide. Flowers white with ' purple tips, 
about 1 cm, long, arched, widely spreading. Banner neariy round, 
about 8 mm. long, 7.mm. wide, about 2 mm. - longer than wings, with 
sides reflexed below. Wings deeply notched, broadly oblong, 7 mm. 
long, 2 mm. wide, a little longer than keel. Keel with rather straight 
base, then abruptly curved to a half circle, very thick, purple and very 
obtuse. Calyx tube about 3 mm. long, nigrescent, oblique and nar-- 
rowed below to.the slender pedicel which is 2 mm long, with teeth tri- 
angular-subulate, spreading and over half as long as tube. Pedun- 
cles about 7 cm. long, longer than leaves, rather stout, the rachis 
about half as long. Leaves and stipules as in A. aboriginum, closely 
sessile and with 5-6 pairs of leaflets which are elliptical, about 1.2 
cm. long and 4 mm. wide, and barely acute. Stems branched: and 
many from the crown. Pubescence softly and rather sparsely woolly. 
On the alpine summits of the Olympic Mts. Washington, Elmer. This 
seems more like an extreme form of A. aboriginum than a good species. 
89. Astragalus alpinus (L.) Sheldon Minn. Bot. Stud: 9 65 (1894).: 
Phaca alpina L. 755. A. frigidus (L.) Gray. Pods nigrescent, very . 
gibbous, acute at both ends, oblong 2-3 cm. long, often 1 em. wide, on, 
a stipe hardly as long ag calyx, inclined to be sulcate dorsally, con- . 
spicuously inflated. Flowers few to many, broad, short and stubby, 
about 1.5 cm. long. Petals all about equal, with fleshy claws.: Ban- 
ner gently arched to 45 degrees 2 mm. beyond. calyx teeth, with sides. 
reflexed toward the tip about 2 mm. wide. Wings oblanceolate, 2 mm. 
wide, nearly straight, half as wide as the lunate keel. Keel broad, ob- 
tuse. Calyx tube about 5-7 mm. long, 2 mm. high, the teeth variable 
from a mere rudiment to Shortly triangular. Bracts 7-10 mm. long. 
Leaves 4-7 cm. long, even the upper short-petioled, the lower ones with 
petioles longer than the adjoining leaflet. The rachis grooved. Leaf- 
lets 4-5 pairs, mostly oblong-ovate, variably black or white-hairy below, 
smooth above. Stems stout, about a foot high, erect and little 
branched, from slender root-branches. Throughout the Arctic regions 
of the World. In the type the calyx is nearly smooth, the American 
forms are nearly all the following. Plants growing in the tundra and 
humus. : 
Astragalus alpinus var. littoralis (Hook.) Sheldon Minn. Bot. Stud. 
9 133 (1894), Phaca frigida var, littoralis Hook. Fl. Bor. Am. 1 140 
11830) A. frigidus var. littoralis. (Hook) Watson. Pods elliptical, 
shortly-acute at both ends, somewhat obcompressed, not sulcate, with 
‘stipe 2-3 mm. long. Flowers capitate, cream-colored, with white mar- 
gins. Banner about 7 mm. long, and 1 mm. longer than keel. 
Wings obovate to narrowly oblong, about 2 mm, wide. Keel rounded 
‘and gently arched from base, blunt, about 3 mm. high. Calyx softly. 
black-hairy, the upper side convex, the lower straight, teeth triangu- — 
lar and about half the tube or less. Bracts rather small, 2-7 mm. 
long. Leaflets hoary below, 3-6 pairs, sparsely woolly, lance-oblong 
to oblong-oval or ovate, 2-3 cm. long, 4-10 mm. wide or more, obtuse 
or retuse or even acutish. Stems sulcate, 1-2, 7-10 cm. long in fruit, 
but hardly 5 em. long in flower. This is the common Alaskan form. 
90. Astragalus Americanus (Hook.) Jones Cont. 8 8 (1898). Phaca 
frigida var. Americana Hook. Bor. Ám. 1 140 (1830). Phaca Amer- 
cana Rydberg. A. alpinus var. Americanus (Hook.) Sheldon. Pods 
‘Smooth and green, very thin, elliptical and triangular-acute at both 
Ë: 
> ends, the body about 2.5 cm, long and 1 cm. wide, on a stipe about 
*twice as long as calyx, with ventral suture conspicuously arched, 
‚ with dorsal-suture a little broadly sulcate and a mere rib within, 
. iriclined to open first at base, often black with minute hairs when . 
„Flowers about 1 cm. long, rather many in a dense spike, ` 
banner oval and a trifle longer than wings which are 
i Fs N Rn es d a : : F. s A mos " 
