6. D. azureum (Micks.): petioles slightly dilated at the base; leaves 3-
5-parted, many-cleft, with linear lobes; racemes strict; petals shorter than
the sepals; the lower onqs deeply 2-cleft, densely bearded; claw hispid on one
side, the other side with a spur-like process at its base; spur ascending.
a. leaves (and lower part of the stem) nearly glabrous; lower petals with
a yellowish pubescent line externally;' spur somewhat incurved, longer than
the sepals; lobes of the lower petals somewhat obtuse; flowers azure.—
D. azureum, Michx. ! ft. 1. p. 314; Pursh, JI. 2. p. 371; DC. prodr. 1. p.
54; Deless. ic. 1. t. 60 ; Ell. sk. 2. p. 18. D. Carolinianum, Walt. Car. p.
I05.
/?. canescently pubescent; divisions of the leaves many-cleft; segments
all linear-subulate; flowers smaller, azure; spur incurved.—-D. azureum
Nutt. gen. 2. p. 14.
y. puberulent; segments of the upper leaves subulate; flowers very pale
blue; spur straight, about as long as the sepals; lobes of the lower petals
narrow, acute, somewhat divaricate.
8. stem densely velutinous; leaves minutely pubescent, with narrowly
linear or subulate segments; flowers pale blue; sepals with a brown pubescent
spot; spur slightly curved; lobes of the lower petals oblong, acutish.
*• minutely puberulent; stem velutinous above; leaves 3-parted, many-
’ segments divaricate, very acute; flowers large, greenish-white; sepals
with a brownish spot; spur thick, somewhat curved.
Var a. North Carolina to Georgia! Texas, Drummond ! B. Arkansas,
Nuttall! y and <5. Arkansas, Dr. Pitcher! p. Lake Winnipeg, Dr.
Houghton! ■ ,
7. D. vimineum (D on ): petioles scarcely dilated at the base; leaves flat
3-parted ; segments cuneiform, obtuse, 3-lobed, mucronulate, uppermost Ones
linear, undivided or 3-parted; racemes loose, velvety; limb of the inferior
petals bifid at the summit; spur straight, as long as the sepals jfcpvaries silky
Don in Sweet!s B rit.fi. gard. t. 374; Hook.! in hot. mag. *5593.
Velasco, Texas, Drummond! July-Aug.—Stem 1- 3. feet high, slightly
branched, slender. Leaves all petiolate; the segments narrow. Flowers
middle sized, bright azure. Sepals oblong, rather obtuse, with a callous protuberance
near the middle. “ Upper petals resembling the carinaof a papilionaceous
flower. Lower petals with the limb spreading, purple, trifid, bearded
with a tuft of yeflow hairs.” Hook.—In our specimens of what we consider
to be this species, the lower petals are not bearded. The plant seems
to be nearly allied to D. azureum.
8. D. virescens (Nutt.): pubeseent; petioles scarcely dilated at the base;
leaves 3-5-parted, the middle division mostly undivided, lateral ones 2-3-
cleft; lobes lanceolate; raceme loose, few-flowered; sepals oblong or lanceolate;
spur longer than the sepals, ascending; lower petals deeply 2-cleft:
claw gibbous at the base.—N u tt.! gen. 2. p. 14; DC. prodr. 1. p. 53.
Plains of Missouri and Arkansas, Nuttall ! North Carolina, Schweinitz !
Georgia, Le Conte! June.—Stem 8-12 inches high. Raceme simple. Pedicels
longer than the flowers. Bracts subulate. Flowers large, yellowish
or greenish white, minutely pubescent. Sepals marked with a brownish
spot near the apex, much longer than the petals. Spur straight or somewhat
incurved. Lower petals rather densely bearded. Ovaries 3.
9. D. variegatum : pubescent; petioles dilated at the base; leaves 3-
parted; divisions cuneiform, many-cleft, with the lobes linear and rather obtuse;
raceme few-flowered; spur scarcely as long as the sepals; lower petals
orbicular-ovate, 3-lobed, with the middle lobe small, sparingly bearded.
California, Douglas !—Stem 1-2 feet high, sulcate. Raceme strict, nearly
simple. Lower bract 3-cleft. Sepals deep violet-blue, somewhat pubescent
externally, obovate-oblong, obtuse, longer than the thick straight spur. Upper
petals yellow (often tipped with blue), emarginate: lower ones sparingly
bearded on the inner surface and margins, waved, unequally 3-lobed, the
central lobe small and blue5 one of the lateral lobes t\lue? the other yellow;
claw with a small spur-like process at the base.
10. D. bicolor (Nutt.): pubescent; petioles somewhat dilated at the base;
leaves digitately 5-parted; lobes 3-5-cleft; divisions linear, short, rather
acute; raceme lax, few-flowered, the pedicels elongated and spreading; spur
rather slender, as long as the sepals; lower petals broadly obovate, entire,
sparingly bearded.—Nutt. ! in jour. acad. Philad. 7. p. 10.
Dry hills near Flat-Head River, towards the southern sources of the Oregon,
Mr. Wyeth! and in open plains on the sources of the Platt e, Nu tta ll! April.
—Stem about a span high. Leaves about 3, near the base of the stem, the
circumscription reniform; divisions short and radiating, slightly pubescent.
Lower bracteal leaves deeply 3-5-parted, with nearly undivided segments. Sepals
large, deep violet-blue, oblong-ovate. Upper petals yellow veined with
blue. Spur curved a little downward; claw of the lower petals without a
spur at the base. Carpels 3. ■
11. D. pauciflorum (Nutt.! mss.): “ somewhat hirsutely pilose; petioles
scarcely dilated; leaves reniform, lobes bifid or trifid, linear and entire;
bracts simple, minute; raceme 3-5-flowered ; spur subulate, straight, about
the length of the oblong acutish petals ; stigmas and styles smooth; root
grumous. , §
“ Rocky Mountains and Blue Mountains of the Oregon—Scarcely a foot
high, slender; the lower part and thé stem more or less minutely and roughly
pubescent. Leaves nearly smooth on the upper surface; two or three divided
ones on the stem, the uppermost beneath the flowers simple. Flowers 2-3,
large, blue. Lower petals with a central line, of pubescence; upper ones
hirsute' externally. Carpels pubescent.” ' Nutt.
12. !). depauperatum (Nutt.! mss.) : “ lower part .of the stem (and leaves)
glabrous; upper part and the carpels densely villous; petioles scarcely dilated;
leaves reniform, 5-parted; the lobes 2-3-cleft, oblong and rather broad; bracts
simple, minute; raceme 1-5-flowered; spur subulate, straight, longer than
thé oblong obtuse petals; stigmas and styles pubescent; root grumous.
“ In the shade of pine woods in the Blue Mountains of the Oregon.—Stem
very slender, simple, about 2-leaved. Leaves Scarcely an inch in diameter, the
lower one glabrous, with broad simple segments; upper ones smaller, with
narrow linear segments. Upper part of the stem and carpels minutely villous.
Petals shorter than the spur; lower ones hairy. Flower often solitary, deep
blue; upper petals yellowish.” Nutt.
13. D. nudicaule: leaves all radical, on short petioles, 3-parted; lobes obo-
vate-cuneiform, the lateral ones 2-lobed, terminal one somewhat 3-lobed;
scape racemose, loosely flowered; pedicels elongated; spur straight, longer
than the broadly ovate sepals; upper petals a little exceeding the calyx, lower
ones 2-cleft, with a minute spur-like process at the base.
California, Douglas !—Scape 12-18 inches high, glabrous, 10-12-flowered.
Pedicels elongated, spreading, 2-4 inches long, above the bracteoles pubescent.
Bracts subulate, very small. Bracteoles minute, seated above the middle of
the pedicels. Flowers (in dried specimens) purplish-red. Sepals obtuse or mu-
cronate. Lower petals smooth on both sides; margin sparsely fringed; upper
ones emarginate. Spur thick. Carpels 3, recurved-spreading, reticulately
veined, pubescent.
t D elegans (DC. syst. 1. p. 355.) was described from specimens transmitted by
Delile from Elgin Botanic Garden, New-York. it is known to be an introduced
plant, and is therefore left out of our Flora.5