tooih rather longest. Vexillum white: keel blue.—Nayet de Prairie of the
Canadian “ voyageurs,” according to Mr. Douglas.
branch^’ ( ? “rsh) : whole plant hirsute ; stem erect, somewhat
thpn=i d i T 5-foliolate; leaflets lanceolate; spikes dense; segments of
fnrrn hp V ancef!kte’i & U] 1® sh?rter the corolla; legumes with an ensi-
tom beak, root thick and fusiform— Pursh, fl. 2. p. 475, t. 22; DC.prodr.
p W2early StemlesS; l6aflets obovate-oblong.—P. esculenta, Nutt.! gen. 2.
Banks of the Missouri, Lewis! 0. On the same river and on the high and
tkp iu '1 8 °f he le! d- m'nes near St' Lou's> Nuttall! Louisiana, west of
the Mississippi, and in Texas, Dr. Leavenworth ! June-July.-Root usual
y about the size of a walnut, scarcely farinaceous, solid and tough. Stem
a foot or more high (in 0. only 1-3 inches above the ground). Leaflets slight-
Iiidh T i n Sf 'ke! Caplt,ate; flowers pale blue: vexillum obovate, marked
with 2 callosities towards the base. Legume covered with the calyx, hirsute.
Pursh.—In our specimens of /?. the leaflets are about 2 inches long and f of
™ _ ^ ! dei the seg.ments of the calyx are equal, the 2 upper Ones not united
, and me long ensiform point of the legume is much exserted. According
to Nuttall the root of this species is the Pomme de Prairie (also called
Pomme blanche) of the Canadian voyageurs. The form of the plant described
by Pursh is very near P. brachiata. Neither species grows west of
the mountains. 6
16. P. hypogaa (Nutt.! mss.): stemless, hirsute with whitish appressed
hairs; leaves o-7-foholate ; leaflets linear-lanceolate, or Imear-oblong, usually
acute; spikes capitate, on peduncles much shorter than the petioles; seg-
ments ot the calyx linear, acuminate, thé lowest one elongated?
Plains of the Platte, with P. esculenta.—Root tuberous, oblong, edible,
about an inch long. Leaflets 1-14 inch long, 2-3 lines wide ; upper surface
nearly glabrous. Spikes nearly sessile, or On peduncles scarcely more than
an inch long Bracts lanceolate. Calyx cleft below the middle; lowest seg-
ment lanceolate, the others almost subulate, curved upward. Corolla pale
dull blue: vexillum oblong, about as long as the very narrow wings, and twice
as long as the keel.” Nuttall. \
P - subacaulis: nearly stemless; peduncles and petioles hirsute with
spreading hairs; leaves on very long petioles, 7-foliolate; leaflets obövate-ob-
long nearly glabrous above, the midrib, beneath and margins hairy ; peduncles
longer than the leaves ; spikes ovate, rather dense; bracts and stipules
ovate, acuminate; calyx much shorter than the corolla; the teeth obtuse lowest
one produced, the others very short.
Rocky grounds near Nashville, Tennessee, Dr. Roane! April-Mav__
Stem scarcely rising above the ground. Leaflets one inch long, sprinkled
with very minute dots; the hairs on the midrib spreading. Peduncles 6-8
inches long. Stipules and bracts scarious. Spikes 20-40-tiowered —A verv
distinct species, but allied to the preceding. 3
, . | a P - Lupinellus (Michx.) : glabrous ; stem slender; leaflets 5-7-foliölate
fmtorm-hnear; racemes much longer than the leaves, many-flowered ; bracts
minute, about as long as the pedicels; legumes somewhat lunate, obliquely
rugose.-^mc/ix. / fl. 2. p. 58 ; Nutt. gen. 2. p. 102; EU. sk. 2. p 196.
P. lupinella, DC. prodr. 2. p. 220. '
Barren sandy places, South Carolina! to Florida! May-July.—Stem
about 2 feet high^ somewhat branched. Leaflets less than a line wide, shorter
than the very slender petiole. Peduncles thick. Raceme lO-20-flówered
Flowers 3-4 lines long, purplish. Calyx glandular; teeth short, nearly equal
V exillum suborbicular. Legume small, with a short recurved point.
* * Leaves pinnately trifoliolate (rarely vmifoliolate).
19- p - rirgata (Nutt.): nearly glabrous ; stem virgate; leaves b-foliolate
(lower ones rarely 2—3-foliolate), very remote; leaflets linear; stipules setaceous;
peduncles shorter than the leaves; spikes ovate-oblong; bracts oblong;
calyx glandular, half as long as the corolla; segments lanceolate, the lower
one a little elongated.—Nutt. ! gen. 2. p. 104; E ll.! sk. 2. p. 197; DC.
prodr. 2. p. 218. P. simplicifolia, herb. Baldw.!
, Near St. Mary’s, Georgia, Dr. Baldwin !—Stem about 2 feet high, spar-
mgly branched. Leaflets of the radical leaves oblong; of the upper ones
2 - 4 inches long and 2-4 lines wide. Spikes rather compact: bracts deciduous.
Flowers pale violet, about 4 of an inch long.
20. P. melilotoides (Michx.): sparingly pubescent; leaves 3-foliolate ; leaflets
oblong-lanceolate, dotted with glands; spikes oblong; bracts broadly cordate
and (like the calyx) glandular, conspicuously acuminate; teeth of the
calyx triangular-ovate, the lowest one longest; legumes orbicular, with strong
transverse wrinkles.—Michx.! fl. 2. p. 58 ; Ell. sk. 2. p. 197 ; DC. prodr. 2.
p. 220 ; Bart. fl. Am. Sept. 2, t. 57. Trifolium psoraloides, Walt. Car. p. 184.
0. gracilis : stem very slender; nearly glabrous; leaflets thin, ovate-oblong,
dotted, glabrous above, the lower surface and margin slightly hairy.—P. gracilis,
Chapman! mss.
Dry soils, Southern States! 0. Pine woods, Middle Florida, Dr. Chapma
n ! May-June.—Stem branched 2 feet high. Leaflets about 2 inches
long. Stipules lanceolate. Peduncles 3-4 times as long as the leaves.
Flowers 3 lines long, usually in pairs, on short pedicels. Calyx and bracts
conspicuously glandular, veined with purple.—The bracts in our specimens
of 0. have fallen off.
o r v eS jandulosa (Ell.) : pubescent, nearly destitute of glands; leaves
3- foliolate 5 leaflets oblong-lanceolate ; spikes oblong; bracts broadly lanceo-
late, conspicuously acuminate, and (as well as the calyx) villous; legume
nearly orbicular, with strong transverse wrinkles. Ell. sk. 2. p. 198; DC.
prodr. 2. p. 220. Melilotus psoraloides, Nutt.! gen. 2. p. 104, excl. syn. ?
Dry soils, Virginia! to Florida! and west to Arkansas! May-June.—
Scarcely distinct from the preceding.
22. P. simplex (Nutt.! m ss.): grayish-pubescent, obscurely glandular
erect; stem simple; leaves 3-foliolate; leaflets lanceolate, acute, rugosely
veined, mucronate; peduncles very long; spikes oblong, many-flowered;
bracts linear-lanceolate, acuminate; teeth of the calyx oblong-triangular the
lowest one longest and acuminate; legumes nearly orbicular, with strono-
transverse wrinkles. .. . °
Plains of Red River, Arkansas, Nu tta ll! Texas, Drummond!—Root
somewhat fusiform. Stems solitary or two from the same root 1-3 feet high'
Flowers larger than in P. melilotoides, bright purplish-blue. Calyx and petlls'
strongly veined. . r
23. P. rhombifolia: sparingly pubescent; leaves 3-foliolate; leaflets rhombic
ovate, shorter than the petioles; peduncles longer than the leaves at
length recurved; Spikes capitate, few-flowered ; bracts ovate, acuminate;
teeth of the calyx lanceolate, the lowest one longest.
Texas, Drummond!— Stem decumbent? slender, angular. Leaflets i-J
of an inch long, dotted with scarcely visible glands. Petioles 1-2 inches
long. Spikes 6-8-flowered. Flowers purplish, 5-6 lines long. Calyx hirsute
; the teeth (except the lowest one) shorter than the tube. Vexillum obovate.
Legume not seen. .
24. P. Onobrychis (Nutt.) : pubescent; leaves 3-foliolate ; leaflets ovate
acuminate; racemes elongated, somewhat secund ; calyx much shorter than
the corolla, without glands; the teeth small, obtuse, equal; legume ovate