LepipiuM. XI. CRUCIFERZ. 161 
at margin. Flowers small, in terminal racemes. Silicles large, flat, with 
dilated wings. The plant has a disagreeable flavor of garlic. June.§ 
2. T. ALLIACEUM. 
Las. oblong, obtuse, somewhatdentate, upper ones sagittate-amplexicaul, 
with acute auricles; sidicles ovate-ventricose; stig. subsessile—In cultivated 
fields, Western States, not common. Stems 6—10’high. Lower leaves petio- 
late. Flowers smaller than in T. arvense, in terminal racemes. This also 
savors of garlic. May—Jl.§ 
3. 'T. TUBEROSUM. Nutt. 
Ri. tuberiferous and fibrous; st. pubescent, simple, short ; lvs. rhomboid- 
ovate, obscurely dentate, smooth and sessile, radical ones petiolate; silicle sub- 
orbicular.—2 Penn. Stem not more than 4—5’ high. Flowers rather large, 
rose-colored. Apr. May. 
2. CAPSELLA. Vent. . 
Diminutive from capsa, a chest or box; alluding to the fruit. 
Calyx equal at base; silicles. triangular-cuneiform, obcordate, com 
pressed laterally ; valves carinate, not winged on the back ; septum 
sublinear; style short; seeds 00; oblong, small, 0|.—@ Fs. white. 
A troublesome weed. 
C. Bursa-pasroris. Mench. (Thlaspi Bursa-pastoris. Linn.) Shepherd’s 
purse. 
Foundeverywhere, in fields, pastures, and roadsides. Stem 6—8—12’ high, 
nearly smooth in the upper part, hirsute below, striate, branching. Root-leaves 
rosulate, 2—h—8’ long, } as wide, cut-lobed, on margined petioles; segments 
about 13. These leaves are sometimes wanting, (when the weed. is crowded,) or 
only dentate. Stem-leaves much smaller, very narrow, with two small, acute 
auricles at base, half clasping the stem. Flowers small, in racemes, which are 
finally 3—12’ long Silicle smooth, triangular, emarginate at the end, and tippec 
with the style. April—Sept. § 
3. LEPIDIUM. R.Br. 
Gr. Nevis, ascale; from the resemblance of the silicle. 
Sepals ovate; petals ovate, entire; silicles oval-orbicular, emar- 
cinate ; septum very narrow, crossing the greater diameter ; valves 
carinate, dehiscent ; cells 1-seeded, 0|| or O—.—Fls. whate. 
1. L. Virainicum. Wild Pepper-grass. 
Lws. linear-lanceolate, incisely serrate, smooth; s¢. paniculately branched 
above; sta. 2—4; silicles orbicular, emarginate; seeds 0=.—@) In dry fields 
and road-sides, U. S. Stem rigid, round, smooth, 1f high. Leaves 1—2’ 
by 1—3” , acute, tapering at base into a petiole, upper ones sessile, lower pinna- 
tifidly cut. Flowers and silicles very numerous, in a panicle of racemes. Fs. 
very small, mostly diandrous; silicles lens-shaped, 13" diam., with a notch at the 
end. ‘Taste pungent, like that of the garden pepper-grass. Jn.—Oct. 
2. L. campestre, R. Br. (Thlaspi campestris. Linn.) Yellow Seed. 
Cauline lvs, sagittate, denticulate; silicles ovate, Winged, emarginate, scaly- 
punctate—@ In waste places and dry fields, especially among flax. Stem 
strictly erect, round, minutely downy, 6—10’ high, branching. Leaves 1’ long, 
i as wide, acute, with 2 lobes at base, upper one clasping the stem, all minutely 
velvety. Flowers small. Silicles 1} long, numerous, in long racemes. Jn. J1.§ 
3. Li. RUDERALE. 
Zvs. cauline, incised, those of the branches linear, entire; ls. apetalous, 
and with but 2 stamens; silicles broadly oval or suborbicular, emarginate, wing- 
less; cotyl. Oll.—Dry fields, Mich., Ia.. Mo. Stem 10—15’/ high. Racemes 
many. Flowers remarkable for wanting the petals, which are always present 
in our other species. 
4. L. sativum. Peppergrass.—Lvs. variously divided and cut; branches with- 
out spines; silicles orbicular, winged.—@ Native of the East. Stems 1—3f 
