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142 - -LEGUMINOS.E. PSORALEA. » 
; PETALOSTEMEN, 
calyx about equal, sparingly hirsute: pode glabrous, 4 lines long, with a 
short erect beak, light..with scattered brown glands and. more or less 
densely villous with white hairs: seeds globose, 3 lines long, light brown. 
On sand banks along the Columbia river, to Idaho and Nevada. 
* * Leaves pinnately 3-foliolate. 
ugl. Hook. Fl. i, 136. Glabrous or with a few weak, 
mostly black hairs: stems slender, assurgent, 1-2 feet high, simple: leaves 
3-foliolate; stipules lanceolate, acuminate, reflexed; leaflets broadly 
rhomboid-oyate, mostly acute, mucronate an inch long, glandular; pedun- 
cles equalling or exceeding the leaves; flowers in capitate racemes; bracts 
small, elliptical; calyx more or less villous with usually dark-colored 
hairs, 4-5 lines long, becoming much_ inflated, lobes nearly equal, triangu- 
lar, the margins ciliate with dark’ hairs; ‘petals 5-6 lines long, white or 
purplish, pods membranaceous, rounded, somewhat compressed, 3 lines 
long; seeds grayish. In open woods and rocky: hillsides, sVancouver Is- 
land to California. ; ; ‘ = 
P. melilotoides Michx. Fl. ii, 58. Hedysarwm pedunculatum Mill. 
Gardn. Dict, No.17. ‘Stems erect, 1-2 feet high, from a long rootstock, 
simple or branching from the base: stipules 2-3 lines long, setaceous: peti-. 
oles shorter than the leaflets; leaves remote, 3-foliolate, rarely 4—5-folio- 
late; leaflets 2 inches long, lanceolate, acute, rarely-ovate and obtuse, gla- 
brous except the veins and margins which are very sparingly hirsute; 
peduncles much exceeding the leayes; flowers in loose spikes: bracts 
glandular, broadly ovate, much imbricated, the cuspidate apex longer than 
the flowers; lobes of the calyx acute, glandular, the lower one the long- 
est: pods orbicular, compressed, transversely wrinkled, beak minute, re- 
curved: seed orbicular, flat, brown. Seattle, Washington (Piper) and the 
Atlantic States. . 
10 PETALOSTEMON Michx, FI. ii, 48, t. 37, 
Herbaceous, mostly perennial glandular dotted plants with 
unequally pinnate leaves with minute setaceous stipules, and 
small flowers in dense terminal spikes or heads. Calyx often 
glandular, 4-toothed, the teeth connivent, nearly equal. Petals 
5, on filiform claws; 4 of them nearly similar, their claws united 
to the stamen-tube quite to the summit, alternate with the stam- 
cus, deciduous by an articulation, the upper one free, inserted at 
the bottom of the calyx, the limb cordate or oblong, condupli- 
cate. Stamens 5, monadelphous, the tube cleft. Ovary with 
2 collateral ovules. Pod membranaceous, enclosed in the calyx, 
indehiscent, 1-seeded. 
P. ornatus Dougl. Hook. Fl. i, 138. Perennial; stems simple, 1-2 
feet high, glandular-dotted: leaflets 5-9, obovate to narrowly oblong, 5-6 
lines long, flowers in dense, long-peduncled terminal spikes, sessile, bright 
purple; bracts lanceolate, acuminate, about equalling the flowers: calyx 
densely silky-villous; upper tooth as long as the tube, the others shorter: 
ovary pubescent. Hillsides and old river banks, Eastern Oregon. 
Tribe 5. <Astragalee. Adans. Erect or decumbent, herbaceous, 
rarely suffrutescent, plants with unequally pinnate leaves and axillary 
or radical, racemose or spicate inflorescence. Corolla paptlionaceous. 
Stamens monadelphous. Pod continuous, turgid cr inflated, rarely 
flattened, often spuriously 2-cellea or partly 2-celled by the tntro- 
flexion of one or both of the sutures, dehiscent, several-seeded, rarely 
i-2-seeded. Radical incurved. 
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