87 
DEBILES 3. 
Pods nearly sessile or shortly stipitate, papery (chartac- 
eous in A. leptaleus), inflated, completely 1-celled, and with 
dorsal suture not at all intruded, nigrescent, becoming gla- 
brous with age, about straight but oblique, nearly half-oval to 
half-ovate or narrowly oblong, but little flattened laterally 
if at all (decidedly flattened in A. Bourgovii), cross-section 
nearly round, not suleate or only flattened dorsally (some- 
times suleate in leptaleus and Bourgovii). Ventral suture 
about straight and tip not declined (except possibly in A. po- 
laris), dorsal suture the more arched. Flower 7-12 mm. long, 
few or in heads. Calyx tube nigrescent, cleft deeper above, 
hyaline, campanulate, 2-3 mm. long, narrowed below, the 
teeth subulate and nearly as long as the tube. Petals rather 
broad and short-elawed. . Keel purple-tipped. Peduneles 
long and filiform. Bract green and lanceolate, a little longer 
than the pedicels, small and short. Leaflets thin and flat. 
Stipules large, connate at least below, green. Stems slender, 
perennial, flexuous, weak, with slender internodes and weak 
and narrow leaves, spreading over the ground, from rather 
slender roots and much divided crowns from fleshy or woody 
roots. This section would seem to belong to the Inflati but 
all its relatives are here. A. vaginatus Pall. referred to in 
Hooker’s Fl. Bor. Am. 1 149 in which the description of Pal- 
las is quoted would naturally come here, but that species is A. 
versicolor, while the plant of Richardson (on which Hooker 
bases A. vaginatus) and which Sheldon calls A. Richardsoni 
is A. Bourgovii probably. A. versicolor does not grow in 
America. 
KEY 
A. Pods large, oval-oblong, 3-5 cm. long, greatly inflated, not reflexed, 
single or few at the ends of filiform peduncles. Roots not woody. 
Arctic plants. 26 polaris. 
2A. Pods small, not over 1.5 cm. long, somewhat inflated, the cross 
section inclined to be ovate, on a minute stipe, or short, few at 
the ends of the filiform peduncles. 
2AB. Pods apparently sessile or on a scarcely noticeable stipe, 
oblique, broad. Flowers capitate when in bloom. 
Leaves petioled, rather few. Leaflets 3-5 pairs. Wet meadows 27 debilis. 
Leaves a very many. Leaflets és pairs. Arctic. 28 Yukonis. 
2A2B. Pods distinctly stipitate, little oblique, narrow, mostly sul- 
cate dorsally. Leaves all petioled. 
Stipe 2 mm. long. Calyx 3-4 mm. long. Pods sharp at both ends. > 
vue nn a atu e Pedicels longer than bracts. 29 Bourgovii. 
Stipe about 1 mm. long. Peduncles longer than leaves. Pedicels 
not longer then bracts. Pods acutish only. 30 leptaleus. | 
