C R U C IF E R S . E rysimum.
removed this little-known plant to Sisymbrium, on account of the incum-
bent cotyledons ; but we are by .no means certam that it belongs to this S -
nus. De Candolle asks whether it may not be a Nasturtium The specimens
in Michaux’s herbarium are only in fruit. P
S. leptopetalum (Raf.) fl. Ludov. p. 268.—See note on p. 86.
14. TROPIDOCARPUM. Hook. ic. 1 .t. 43.
Silique linear or lanceolate-linear, compressed contrary to the septum •
valves somewhat carinate. Septum very narrow, often incomplete. Seeds
oblong, compressed, not margined. Cotyledons narrow, shorter than the
radicle. Sepals equal at the base.—Herbaceous annuals. Leaves pinnatifid
Flowers small, yellow, in leafy racemes.
~H m k . (H ° 0k'): neari7 glabrous; leaves pinnatifid; silique linear.
Wet places on the plains around Monterey, Upper California, Douglas
Nwttall. —Stem decumbent, 6-12 inches long, very sparingly hirsute Radical
leaves bipmnatifid the others pinnatifid; segments narrowly linear and
very acute Flowers from the axis of the uppermost leaves, on slender ped
ic le s , 3-8 lines long. Sepals oblong. Petals obovate, erect, nearly ^ ce
the length of the sepals. Silique about an inch long, attenuated into a short
style ; the septum sometimes nearly obliterated. ho a snort
J § T - scabriusculum (Hook ) : somewhat roughly hirsute; leaves bipinna -
tihd ; sdique lanceolate.—Hook.! l.c .t. 52. F
With the preceding, Douglas ! Nuttall ƒ—Differs from T. gracile chiefly in
fm t f l o w e r s SCeTCh ’ rather, s}l0rter, le.aves and pedunclesf and somewhat
„1 iT npe Slhques °f thls sPecles have the whole length. It is very narrow, so that, at the upptehre psaerptt utmhe coopmppolseittee
placentae are almost m contact. Hooker has not described the seeds of this
genus, probaHy because his specimens were immature. The cotyledons are
decidedly incumbent, but he with their edges parallel to the septum !
15. ERYSIMUM. L in n .; DC. syst. 2. p. 491.
Silique 4-sided. Calyx closed. Cotyledons oblong.
§ Style short or scarcely a n y : calyx deciduous: lehves neither cordate
nor clasping : flowers distinctly pedicellate.—Erysimastrum, DC.
1. E . cheiranthoides (Linn.): somewhat scabrous with a minute appressed
pubescence; leaves lanceolate, denticulate or entire; siliaues erect
spreading, twice the length of the pedicels; stigma small.—Pursh, fl. 2. p
436; DC. prodr. 1. p. 198; Hook.! fl. Bor.-Am. 1. p. 64. E pamflorum
Pers. syn. 2. p. 199; Nutt.! gen. 2. p. 16. " ■ P m,
Along steeams throughout the United States! and Canada! west to Mis-
soun and N. W. Coast. July-Aug.—<T) or (§) Stem 1-2 feet high, simple
or branched Pubescence 3-4-parted. Flowers small, yellow.S Siliaues
about an inch long, pointed with a short style.—A native also of Europe.
2. E. lanceolatum (R. Brown): canescently scabrous with an appressed
2-parted pubescence ; stem nearly simple; leaves linear-lanceolate, the lower
ones usually toothed; claws of the petals longer than the calyx; siliques
long, erect; stigma emarginate. Hook.—R. Br. in hort. Kew. (ed. 2.) 4. p.
116; DC. prodr. 1. p. 199; Hook. fl. Bor.-Am. 1. p. 64. Cheiranthus
erysimoides, Einn.
Canada to Arctic America.—Distinguished from the preceding by its
more pubescent leaves, shorter siliques, and larger flowers. Hook.
3. E . asperum (DC.) : canescent with a scabrous appressed pubescence,
the hairs fixed by the middle; stem simple; leaves linear-lanceolate, cauline
ones entire, radical ones runcinate-toothed; siliques elongated, at length
spreading; style short, Very thick; stigma 2-lobed.—DC.! syst. 2. p. 506;
Hook. fl. Bor.-Am.. 1. p. 64. t. 22. E. lanceolatum, Pursh, fl. 2. p. 436.
(fide DC.) Cheiranthus asper, Nutt.! gen. 2. p. 69.
Missouri! to Oregon, and in British America, north to lat. 65°. (2) Stem
12-18 inches high. Cauline leaves 2 inches long, 2-3 lines w id e; margin
retrorsely scabrous. Flowers large, fragrant. Petals with the claws longer
than the sepals. Siliques 2-3 inches long, scarcely a line wide, somewhat
quadrangular. Seeds oblong. Cotyledons distinctly incumbent, although the
radicle is a little oblique.
4. E . Arkahsdnum (Nutt.! mss.): “ slightly roughened with appressed
hairs, which on the stem are fixed by the middle and on the leaves 3-parted;
stem simple; leaves oblong-lanceolate, runcinately and sinuately toothed,
attenuate at the base; siliques elongated, nearly erect, tapering at the summit
; stigma 2-lobed.
“ Open plains of Arkansas. [Also in Texas, Dr. Leavenworth /]—(5)
Stem 14—3 feet high, angular above. Leaves about 2 inches long, scarcely
one-third of an inch wide ; the radical ones almost pinnatifidly toothed, with
distant teeth. Raceme at first short and corymbose; in fruit much elongated.
Flowers as large as in the common Wall-flower, yellow, shaded with
orange. Claws of the petals much exserted; limb broadly obovate. Si-
liques 2 i inches long, almost exactly 4-sided.” Nutt.—Cotyledons obliquely
incumbent. Differs from the preceding in the less scabrous pubescence,
narrower and toothed leaves, and in the tapering summit of the style, as
well as in the larger flowers.
5. E . elatum (Nutt.! mss.): “ somewhat scabrous; the hairs on the stem
fixed by the middle, on the leaves 3-4-parted; stem tall and simple; radical
leaves usually runcinate; cauline lanceolate, remotely denticulate, attenuated
at each extremity.
“ Grassy situations by the banks of the Wahlamet.—(5) Stem 3-5 feet
high, covered with minute appressed hairs, but not canescent. Radical
leaves more or less divided or toothed, sometimes, as likewise those of the
stem, almost entire. Flowers very large, colored with various shades of yellow
and orange. Claws of the petals exserted, half an inch or more in
length; limb obovate. Mature siliques not seen.” Nutt.—Very near the
preceding.
6. E. parviflorum (Nutt, mss.) : “ canescent and scabrous; stem low and
simple; leaves all linear or somewhat lanceolate, almost wholly entire; siliques
erect; petals scarcely longer than the calyx.
“ Plains of the Rocky Mountains.— (§) or If. About a foot high. Leaves
remarkably narrow, densely clustered at the base of the stem. Flowers
small, sulphur-yellow.” Nutt.
7. E. pumilurn (Nutt, mss.): “ somewhat scabrous; leaves linear, (apparently)
all entire; siliques flatly 4-sided, very long, erect; pedicels very short;
stigma small, nearly entire; petals longer than the calyx.
“ Dry elevated plains of the Rocky Mountains.^ © Stems 2-4 inches
high. Flowers pale yellow, conspicuous. Siliques 3 inches or more in
length.” Nutt.