usually simp e, but sometimes a little branching from the base: pubescence
simple or forked. Flowers very small, yellow: petals about twice as long as
the calyx. SHicle A lines long, rather obtuse: stigma sessile.—Hooker’s
reference to NuttaU’s Genera is a imstake, as Nuttall has no D. lutea. Not
very distinct from the next species.
25. D. nemoralis (Ehrh.) : pubescent; stem branched; leaves oval;
caulme ones lanceolate, toothed; silicles oblong-elliptical, pubescent, nearly
30-seeded, one-third the length of the pedicels. Hook.—DC. prodr. l.p . 171 •
H ook! ft. Bor-Am. 1. p. 55. ^ r ’
a. flowers yellow; petals nearly entire. Hook. L c.
0. flowers nearly white; petals emarginate. Hook l c
Coast and Submctic America! 0. Plains of the Rocky Mountains,
NuttdU ; Fort Gra lot, Michigan, Dr. Pitcher .'-S tem slender, 3-4 inches
high, pubescent below, glabrous above. Leaves hirsute. Flowers minute.
Pedicels very long. Petals emarginate, longer than the hairy calyx.—Our
specimens from Dr. Pitcher have glabrous fruit.
26. D. muralis (Linn.) : pubescent; stem branching, leafy; leaves
broadiy ovate ; caulme ones cordate, somewhat clasping, strongly toothed ;
sdicles oblong-elliptical (glabrous, DC.), about 16-seeded/a little shorter than
the pedicels (flowers white). Hook.—Eng. hot. 1. 192 ; DC. prodr. 1. p. 171 •
Hook.fi. Bor.-Am. 1. p. 56. r y , fi
About Montreal. Petals entire or notched, upon the same plant. Hook.
— Ihe last three species are m much confusion, which we have not the
jmeans of clearing up and we have therefore very closely followed Hooker
who, however, is far from being satisfied with his own account of them. *
27. D. cuneifolia (Nutt.): hirsute-pubescent; stem branching below
leaves sparingly toothed; radical ones spatulate-oblong; cauline ones few
oblong-oyate, somewhat attenuate at the base; racemes rather elongated in
fruit; silicles oblong-lanceolate, minutely hispid, twice as long as the pedicels;
petals (white) emarginate—A to . ! mss. in herb. Hook. T"
S11' L£ uis> Missouri; also in Arkansas and West
Florida, Nuttall! Kentucky, Short! March-April.—Very pubescent the
hairs branching. Plant 3-8 inches high; the lower part only clothed With
uiadlCa IeaTes an ,nch and a llalf long, and three-fourths of
an inch broad. Flowers rather large : petals nearly three times as Iona- as
the calyx. Silicles 6-7 lines long, minutely hispid, especially on the margin
diverging horizontally ; cells about 15-seeded : style none. g ’
2S. D. platycarpa: canescently hirsute with branching hairs; stem
branchmg below, the branches leafy; leaves remotely toothed ; radical on“
obovate , caulme oblong, closely sessile ; racemes elongated in fruit; silicles
emmSna0^ ’ ^ Sh°rter tLan the Pedd^ ; petals ’(white)
I 'Pex&s, Hrummond /—Stem 3-8 inches high, divergingly branched below
Leaves about an mch long, with 2-3 distinct teeth °on each side. Petals
broadly.obovate; he claw short; hmb deeply emarginate. Silicles on spread-
3frseedede S’ ^ °ng and nearly 2 lines broad, very obtuse ; cells 25-
, 29’ p - tea ch y ca rp a jm tt. mss.): minutely pubescent, simple or branchffbout
2 ? t o X SHr°Un ^ °Vate’ Petl°led’ Caui ( about 2-) toothed, or entire; racemes many-fllonwe eorbeld°,n Ss torric lti neealor,n gmaitneudt eilny
fruit (flowers white) ; silicles oval, glabrous about the length of the ped“
S p l f f e ^ * " * ent*re- Alyssum f l d S I g ,
’ s,em " * > “ “ ple >
Plains and open grassy places, near St. Louis, Missouri; and in Arkansas,
Nuttall! Mifledgeville, Georgia, Dr. Boykin! Macon, Georgia, Mr. Loomis!
0. Arkansas, Nuttall ! March-April—Stem often much branched, leafy.
Flowers riiinute. Silicles about 2^ lines long 5 valves marked with, a me-
dian nerve, obscurely veined. Petals obovate, very slightly emarginate.
30. D. Caroliniana (Walt.) : stem leafy and hispid at the base, naked
and smooth above; leaves roundish-ovate, entire, hispid; sflicles linear,
glabrous corymbed, longer than the pedicles (flowers white).— Watt. Car.
p. 174; ’Ell. sk. 2. p. 138; DC. prodr, 1. p. 171. D. hispidula, Michx. !
fi. 2. p. 28; Pursh! fl. 2. p. 433. Arabia rotundifolia, R a f. in Amer. month,
mag. 2,p. 43'.
0. umbellata: sflicles elpngated, almost umbellate.
Sandy fields. Connecticut! to Georgia ! west to Arkansas ! 0. Arkansas,
Dr. Pitcher ! April-June.—Plant 1-3 inches high. Petals oblong, twice as
long as the sepals. Silicles 4—6 lines long; cells 20—30-seeded: style almost
none.—Petals in the terminal flowers of old racemes very minute, or nearly
wanting.
31. D. micrantha (Nutt, mss.): “ stem leafy and hispid below, naked
and smooth above; leaves cuneate-obovate, hispid, entire; silicles linear, minutely
hispid, much longer than the pedicels (flowers white).
“ Open plains and rocky places about St. Louis, and in Arkansas.” Nuttall.—
Differs from the preceding chiefly in the hispid silicles.
§ 2. Petals 2-parted.—E hophila, DC.
32. D. verna (Linn.) : scapes naked; leaves lanceolate; somewhat toothed;
silicles elliptical.—Eng. bot. t. 586; Pursh ! fi. 2. p. 433. Erophila
Americana & vulgaris, DC.prodr. l.p . 173. E. vulgaris, Hook. fl. Bor.-
A.m 1. p, 56.
Fields and hill sides, Canada! to Virginia! March-April.—® Scapes 1-
4 inches high, filiform. Flowers minute, white. Sflicles on long pedicels :
style very short. Seeds numerous.
24. COCHLEARIA. Tourn.y D C .s y st.2 .p .3 5 8 .
Silicle ovate-globose, or oblong ; valves ventricose. Seeds numerous, not
bordered. Calyx equal, spreading. Petals 2-parted. Stamens toothless.
Style short or none.—Flowers white. Leaves mostly fleshy.
1. C. oblongifolia (DC.) : sflicles roundish, half as long as the pedicels ;
cauline leaves oblong, entire (or sinuate-toothed), sessile, the uppermost
slightly auricled. DC. syst. 2. p. 263; Hook.fi. Bor.-Am. 1 p. 56.
N. W. America ; Sitcha, Bongard.
2. C. Anglica (Linn.) : sflicles globose-elliptical, reticulately veined, half
as long as the pedicels; radical leaves petioled, ovate, entire; cauline ones
oblong. DC.—Eng. bot. t. 552 ; DC. prodr. 1. p. 173; Hook.fi. Bor.-Am.
1. p.-57.
Arctic America and Kotzbue’s Sound to Oregon.—Septum often fenestrate.
Hook.
3. C.fenestrata (P^. Brown): silicles elliptical or oval; valves scarcely
veined; septum elliptical-lanceolate, with the axis often fenestrate; radical
leaves cordate, entire; cauline ones oblong-spatulate, somewhat toothed.
R. B r .! in Ross’s voy. and in P arry’s 1st voy. app. p. 266; DC. prodr.
l.p . 174; Hook.! fl. Bor.-Am. l.p . 57.