4. P. Inngifoha(Pursh) : whole plaat silky-villous ; leaves 3-foliolate, obscurely
glandular ; leaflets linear, elongated ; spikes pedunculate, loose, short-
“ “ a2,"?e ea^es > teeth of the calyx and bracts lanceolate.—Pursh. ft. 2. v.
741; DC. prodr. 2. p. 220, F
On the Missouri, Bradbury! (v. s. in herb. Lamb.)— Stem about afoot
nigh, apparently assurgent. Leaflets an inch long, scarcely one line wide.
Flower small. 1
5- P- linearifolia: slightiy pubescent with appressed hairs; stem tall
slender divaricately branched; leaves 3-foliolate, on short petioles; leaflets
narrowly-hnear, elongated, mucronate, the upper surface dotted with black
glands; stipules minute subulate, deciduous; peduncles filiform; racemes
loose, lew-flowered, much longer than the leaves; calyx glandular, the teeth
lanceolate, acute, the lower one elongated.
Arkansas, Beyrich! communicated by Dr. Leavenworth. Stem sprink-
, a / ew black h°ts- Leaflets 2-3 inches long, 1-2 lines wide, scarcely
glandular beneath. Racemes 6- 8-flowered. Bracts lanceolate. Pedicels
slender, longer than the flower.
6. P. scabra (Nutt, mss.): “much branched, somewhat hirsute when
young; leaves 3-foliolate. glandular; leaflets all sessile, narrowly-linear, apicu-
late ; stipules minute, deciduous ; racemes few-flowered, on short peduncles •
calyx glandular, the teeth obtuse. ' * r
On the Walla-wallah, Mr. John Townsend. A slender species, with
small leaves and flowers.—In habit allied to P. glandulosa of Chili.” Nuttall.
7. P. digit ata (Nutt.! mss.) : canescent, diffusely branched; leaves 5-fo-
liolate ; leaflets cuneate-oblong, and oblong-linear, with an abrupt rigid point,
minutely dotted; stipules lanceolate, reflexed; spikes elongated, interrupted
the clusters 3-6-flowered ; flowers sessile ; bracts obcordate or reniform; calyx
villous ; segments ovate, acuminate, the lowest one produced.
Sandhills of Red River, Arkansas, N u lta ll! Dr. Leavenworth ! Western
parts of Arkansas, Beyrich ! May.—Stem bushy, with slender branches.
Leaflets about one inch long, 2—4 lines widè, glabrous above, hirsute beneath:
petioles shorter than the leaflets. Spikes many times longer than the leaves.
Ca.yx naif as long as the corolla $ lowest segment one-third longer than the
others. Vexillum roundish-obovate. Legume orbicular-ovate, compressed
hirsute, not wrinkled. Seeds ovate.
8. P. Jloribunda (Nutt.! mss.): canescent, not glandular, much branched;
leaves 3-5-foholate; leaflets varying from linear to obovate-oblong slightly
mucronate; stipules setaceous, minute; racemes many-flowered, oblong
scarcely interrupted, twice as long as the leaves; pedicels as long as thé
flowers; bracts small, ovate, acuminate ; teeth of the calyx somewhat equal
ovate, acute ; vexillum nearly orbicular. ’
Plains of the Arkansas and Platte, nearly to the Rocky Mountains, Nutt all!
Arkansas, Dr. Pitcher ! and Dr. Leavenworth! Illinois, Mr. Buckley !
June.—Stem 2-4 feet high, somewhat spreading. Leaflets 2-4 lines wide"
longer than the petiole. Racemes 40—50-flowered: pedicels rather longer
than, the bracts. Flowers about one-fourth of an inch long.
9. P. obtusiloba: canescent; branches spreading; leaves 3- rarely 5-fo-
liolate ; leaflets oblong-obovate, obtuse or slightly emarginate, finely dotted-
stipules very minute; racemes 3 times as long as the leaves, oblong, loose’
10-15-flowered; bracts minute; broadly ovate, abruptly acuminate, spreading;
calyx very short; the teeth ovate, nearly equal, obtuse; vexillum roundish.
Texas, Drummond!—Plant clothed in every part with a minute appressed
pubescence, much branched. Leaflets about £ of an inch in length.
Stipules almost none. Calyx scarcely £ the length of the petals. Legume
nearly glabrous, not wrinkled.
10. P. canescens (Michx.) : canescently pubescent; lower leaves 3-foliolate,
upper ones unifoliolate, on short petioles; leaflets orbicular-obovate, abruptly
narrowed at the base and petiolulate, dotted with glands; stipules subulate,
about as long as the petiole; racemes longer than the leaves, 4- 7-flow-
ered, the flowers pedicellate; calyx inflated, conspicuously glandular, the
lower segment produced.— Michx. ! ft. 2. p. 57 ; Pursh ! ft. 2. p. 475; Ell.
sk. 2. p. 195 ; DC. prodr. 2. p. 220.
Sandy soils, North Carolina! to Florida! May.-July.—Root fusiform.
Stem much branched, 2-3 feet high, spreading. Leaflets an inch or more
wide, often slightly emarginate. Calyx hirsute when young. Corolla at
first blue, then yellowish (L e Conte). Legume with a short ensiform point,
very glandular, not wrinkled.
11. P. argophylla (Pursh):, very silky and silvery, erect, divaricately
branched; leaves 3-5-foliolate; leaflets elliptical-lanceolate; spikes pedunculate,
interrupted, longer than the leaves; bracts ovate-lanceolate; flowers
nearly sessile, 2-3 to each bract; lower tooth of the calyx very long.— Pursh !
fi. 2. p. 475; Hook. ! fl. Bor.-Am. 2. p. 136, t. 53. P. incana, Nutt. ! sen
2. p. 102; DC. prodr. 2. p. 219.
Dry open plains on the Missouri. Lewis ! Nuttall ! on the Saskatchawan,
&c., Drummond! Falls of St. Anthony, Dr. Houghton! July.—Plant
1-2 feet high, every part densely clothed with soft silvery-white appressed
hairs.—Leaflets 1-2 inches long. “ ’ Stipules subulate. Spikes about twice as
long as the leaves. Lower tooth of the calyx as long as the corolla. Petals
blue: vexillum obovate, the auricles small and callous.
12. P. campestris (Nutt.! mss.): “ densely canescently hirsute with short
white appressed hairs; leaves 5-foliolate, the uppermost sometimes 3-foliolate
; leaflets linear and oblong-linear, rather obtuse, nearly glabrous above •
peduncles elongated; spike interrupted; bracts 3-flowered, broadly ovate’
acuminate ; lower tooth of the calyx elongated.
“ Plains of the Platte. June—Allied to the preceding, but much less hirsute
and silvery, and more branching. Leaflets 1—14 inch long and 1-2 lines
wide. Stipules linear. Bracts of the flower-buds nearly orbicular.” Nuttall.
13. P. cryptocarpa: stem somewhat divaricately branched, canescently
hairy with an appressed pubescence ; leaves 5-foliolate ; leaflets elliptical-oblong,
rather obtuse, mucronate, about as long as the petiole, punctate; stipules
subulate; peduncles longer than the leaves; spikes ovate, compact; bracts
lanceolate, cuspidate, shorter than the flower; calyx conspicuously glandular
large, entirely covering the ovate nearly glabrous scarcely pointed legume-
the teeth triangular-lanceolate, acuminate, nearly equal, the 2 upper ones’
united to the middle. 9 * 11
Arkansas, Dr. Leavenworth! Texas, Drummond!— Stem 1-2 feet high
terete, when old nearly glabrous. Leaflets 14 inch long. Calyx somewhat
inflated, gibbous at the base. Legume membranaceous, slightly tipped with
the base of the style, not wrinkled. ^
14. P . brachiata (Dougl.): stem erect, somewhat branched, nearly hispid
with long spreading hairs; leaves 5-foliolate, hirsute with appressed hairs-
leaflets elliptical or obovate-oblong, rather obtuse; peduncles elono-ated-’
spikes oblong; flowers erect, sessile; bracts as long as the flower ; teeth of
the calyx lanceolate, the 2 upper ones united above the middle.—Hook ' tl
Bor.-Am. 1. p. 137, t. 53. " ' '
Plains of the Saskatchawan, Drummond! Douglas. Root fusiform
thick, somewhat farinaceous. Stem 12-18 inches high. Stipules lanceolate’
large. Leaves 14 inch long. Racemes 2-4 inches in length. Bracts lanceolate,
foliaceous, about as long as the flowers. Calyx somewhat inflated lower