§ 3. Siliques terete: seeds ovate, somewhat triangular: flowers yellow
—Irio, DC.
5. S. Sophia ( Linn.): leaves bipinnatifidly divided; lobes oblong-linear,
incised; pedicels 4 times the length of the calyx; petals smaller than the
sepals. DC.—Pursh,ft. 2. p. 440?; DC. prodr. l.p . 193.
JNear Uuebec and other parts of Lower Canada, Mrs. Percival! near
^T- Holmes ;Virgmia, Pursh. Apparently native in Canada,
v ® « “ t 2 feet high. Segments of the leaves less than a line in
Dreaatn. feiliques an inch long, linear, very narrow.
. 6: S \ sophioid.es (Fischer) : leaves bipinnatifid; lobes ovate or lanceolate,
incised ; pedicels (and petals) somewhat shorter than the calyx; siliques
imear-fihform falcate and, as well as the flowers, in umbelliform corymbs.
}n ¥ mlf fi- Bor.-Am. l. p. 61. t. 20. S. Sophia, Cham. &
Schlecht vfi Lmnoea, 1. p. 28. S. Sophia, var. ? Richards, app. Frankl.
joum.p. 27. _ 11
Hudson’s Bay to Kotzebue’s Sound.—® Stem branching, flexuous, nearly
glabrous. Peduncles glandular-pubescent. Flowers deep yellow. Siliques
densely umbelled (not elongated into a raceme in fruit), 2 inches long,
3 times the length of the pedicels.
7. S. canescens (Nutt.) : leaves bipinnatifid ; lobes oblong or lanceolate,
somewhat toothed; petals scarcely exceeding the calyx; siliques in elongat-
pedfcelsmêS’ °b 0Dg °r oblon^ linear> shorter (°r rarely longer) than the
canescent; lobés of the leaves obtuse (or obovate) ; siliques somewhat
a^ about. half as lonS as the pedicels.—S. canescens, Nutt. ! gen. 2. p.
68; DC.prodr. 1. p. 194; Ell. sk. 2. p. 147; Hook. ft. B o r.-Am.l. p. 62
Erysimum pmnatum, Walt. Car. p. 174. Cardamine? Menziesii, ÜC
prodr. 1. p. 153. (fide Hook.) ’
8. leaves minutely pubescent, but not hoary ; peduncles and pedicels sparingly
furnished with stipitate glands intermixed with simple pubescence :
siliques as m var. a.
y. leaves glabrous; lobes obtuse, mostly entire; stem and pedicels minutely
glandular ; siliques as m var. a. & 0. 1
s- lobes. of tire leaves somewhat acute, and, with the stem, furnished with
minute stipitate glands; petals rather longer than the calyx ; siliques scarcely
attenuate at the base, somewhat longer than the pedicels.—S. brachycar-
pum Richards. ! app. Frankl. journ. ed. 2. p. 27 ; DC. prodr. 1. p. 194 :
Hook.Jl. Bor.-Am. l.p . 82. .
c' ( Californicum) : somewhat canescent; lobes of the leaves acutely
toothed ; petals obovate, one-half longer than the calyx.
f. (breyipes, Nutt, mss.) : “ siliques usually longer than the pedicels. ”
a. Arctic America to Florida ! Arkansas ! Rocky Mountains, plains of the
Oregon, and Upper California, Nuttall. 0. Georgia ! Arkansas ! Texas !
r- Kentucky, Short ! ô. Arctic America and Canada, ex Hook. ; Lake Superior,
Dr. Houghton! Dr. Pitcher! «. California, Douglas ! 1. Rocky
Mountains, Nuttall.—^ ^ Plant 1-2 feet high. Flowers very small (in var.
«. twice as large as in the other varieties). Pedicels spreading, with the
siliques often erect.
§4. Siliques linear, compressed, somewhat terete: stigma nearly sessile:
flowers white (or rose-color): peduncles usually short.—Arabidonsis
DC. ’ 8 *
8. S. humile (Ledeb.): canescently pubescent,perennial; stems diffuseleaves
entire or sinuate-tdothed; radical ones spatulate; cauline ones lanceolate
attenuate at the base; siliques pubescent, terete, torulose, linear; 5 times
the ’length of the pedicels. Hook.! ft. Bor.-Am. 1. p. 62.
a. leaves mostly entire. Ledeb.—Hook. 1. c.
8. leaves sinuate-toothed and somewhat pinnatifid. Ledeb.—Hook. 1. c.
Rocky Mountains, lat. 52°-57°, to Arctic America!—Stems 3-6 inches
high. Radical leaves numerous, rosulate, nearly an inch long: pubescence
stellate. Flowers 3-4 lines in diameter, “white or rose-color.” Hooker.
9. S .'Th a lia n a (Gay) : annual; stems often many from one root, rather
naked, branching above, erect; leaves (and lower part of the stem) hairy,
sparingly toothed; radical ones ovate-oblong or spatulate-oblong, somewhat
petioled; siliques erect-spreading, twice as long as the pedicels.— Gay, in
ann. sci. nat. 7. p. 399; Hook. ft. Bor.-Am. 1. p. 63; Meyer, pi. Cauc.
(1831) p. 190. Arabis Thaliana, Linn.; Eng.bot. t. 901; Pursh! fl. 2. p.
437; DC. prodr. 1. p. 144.
On rocks and in sandy fields, Massachusetts ! to Georgia! west to Kentucky.
Introduced ? May.—Stem 3-10 inches high; the upper part glabrous.
Cauline leaves oblong or linear. Flowers very small. Siliques
straight, 6-8 lines long. Seeds in a single series.
10. S', glaucum (Nutt.! mss.): “ annual, glaucous, much branched;
leaves entire; radical ones small, spatulate; cauline ovate, sagittate and
clasping, rather acute; siliques nearly straight, erect, compressed, with convex
valves, four times the length of the pedicels.
“ Prairies of the Oregon,, towards the Rocky Mountains.—About a foot
high, erect. Flowers very minute, pale purple. Petals cuneate-oblong, one-
half longer than the sepals. Siliques three-fourths of an inch long, glabrous:
style almost none. Seeds in a single, or partly in a double series. Cotyledons
decidedly incumbent.” Nutt.
11. S. virgatum (Nutt. !,mss.): “ biennial, canescently hirsute with simple
and stellate hairs ; stem virgately branched from the base; leaves lanceolate
linear, clasping, lower ones denticulate or entire; siliques somewhat terete,
erect, 4-5 times the length of the pedicels; seeds in a double series.
“ Hills of the Rocky Mountain range, near the sources of the Sweet Water
of the Platte.—About a span high. Leaves 6-8 lines long, and 2 lines
wide. Flowers rather larger than in the preceding species, pale purple.
Petals obovate-spatulate, obtuse. Radicle almost exactly dorsal.” Nutt.—
Septum very thin and translucent, marked with a distinct central nerve.
12. S. pauciftorum (Nutt.! mss.): “ biennial, hirsute with forked hairs
(not canescent); leaves entire, radical ones narrowly oblong-spatulate; cauline
lanceolate-linear, sessile; stem rather slender, branching from the base;
siliques long, pendulous; seeds in a double series.
“ With the preceding.—Stem about a foot high, slender, nearly smooth
above. Flowers about twice as large as in the preceding species, white.
Petals exserted. Siliques three times as long ah the pedicels.” Nutt.
X Doubtful species.
13. S ? teres: small, erect, branched; leaves all somewhat lyrately pinnatifid;
siliques rather short, linear, acuminate, on very short pedicels.—
Cardamine teres, Michx. ! ft. Bor.-Am. 2. p. 29 ; DC. syst. 2. p. 259.'
Vermont, on Lake Champlain, Michaux.!—(1) Stem about 8 inches high,
a little roughened with short hairs. Leaves nearly glabrous, cauline ones with
3-4 pairs of lobes; the lobes entire or toothed, terminal one 3-cleft. Racemes
lon g : pedicels about a line long. Siliques erect, one-third of an inch
in length, pointed with a slender style one line in length; valves very convex.
Seeds very numerous: cotyledons distinctly incumbent.—We have