Leguminaceae 22) 
CCC. Leaves pinnately compound, with 4 or more leaflets or occasionally some 
. leaves with fewer. 
| L. Leaves with an odd leaflet at the tip, without tendrils. 
M. _ Herbage conspicuously glandular-dotted, 
N. Leaflets 5—9, narrowly oblong to obovate, 11.2 cm. long; peduncles 
much exceeding the leaves, terminal; flowers deep-purple; stamens 5; pod not 
prickly, |-seeded. PETALOSTEMUM (p. 234) 
NN. Leaflets 13—17, oblong to oblong-lanceolate, 2.55 cm. long; pe- 
duncles about equaling the leaves, axillary; flowers ochroleucous; stamens 
10; pod prickly with hooked prickles, 2—-6-seeded. 
GLYCYRRHIZA (p. 239) 
MM.  Herbage not glandular-dotted; stamens 10: pod not prickly. 
O. Flowers solitary or in umbels; pod linear, not jointed; leaflets 315. 
Lotus (p. 233) 
; OO. Flowers in spikes or racemes, rarely solitary and then the pod not 
linear; leaflets often more. 
P. Pod 2—4-jointed, reticulate. HEDYSARUM (p. 239) 
PP. Pod not jointed, often veiny but hardly reticulate. 
: Q. Keel of the corolla acute or subulate at apex. 
i ARAGALLUS (p. 239) 
QQ. Keel of the corolla obtuse at apex. © ASTRAGALUS (p. 234) 
LL. Leaves without an odd leaflet at the tip or often with tendrils. 


R. Style terete above, with a tuft of hairs at tip. VicIA (p. 240) 
RR. Style somewhat flat above, with hairs down the concave side for a short 
distance from the tip. LaTHYRUuS (p. 241) 
THERMOPSIS 
Herbs, perennial, stout; stems erect. Leaves 3-foliolate: leaflets petiolulate, entire: 
stipules foliaceous, free. Flowers yellow, in terminal bracted racemes; bracts herbaceous, 
persistent. Calyx 4—5-cleft to the middle; lobes equal or the 2 upper ones united. 
Standard roundish, shorter than the wings; wings oblong; keel nearly straight, obtuse, equal- 
ing the wings. Stamens 10, distinct. Pod narrow, flattish. Seeds few to many. (Gk. 
thermos—the lupine, opsis—like. ) 
A. Two upper calyx-lobes united into a 2-toothed segment. 
B. Racemes short, loosely flowered; bracts ovate, acute, mostly shorter than the 
pedicels; calyx-teeth acute. U. 
T. gracilis Hew. 
BB. Racemes long, densely flowered; bracts ovate-lanceolate, acuminate, mostly 
longer than the pedicels: calyx-teeth acuminate. U. 
T. robusta How. 
AA. Two upper calyx-lobes united only about as much as the others. 
C. Leaflets oblong-oblanceolate to obovate; plant with somewhat fleshy rootstock. W. 
E. (7. montana ovata; apparently T. arguta.) 
T. montana Nutt. 
CC. Leaflets oval to narrowly elliptic; plant with woody caudex and roots. E. 
T. xylorhiza Nels. 
ULEX GORSE 
Shrubs; branches stiff, spine-like. Leaves simple, linear or awl-shaped, stiff, very 
prickly. Flowers large, yellow, solitary or in racemes. Calyx membranous, mostly 
yellow, divided nearly to base into 2 lips; upper lip mostly 2-toothed, lower 3-toothed; 
