21. VESICARIA, Lam. Bladder-pod. (Lat. vesica, a bladder or blister; from the inflated silicles.) Petals entire; silicle globous or ovoid; inflated valves nerveless, hemispherical or convex; seeds several in each cell, sometimes margined (0=). - Fls. yellow.

1 V. Shortii Torr & Gr. Lvs. elliptical, sessile, entire; style twice as long as the globous silicle; sds. 2 - 4, not margined.- Banks of Elkhorn Creek, near Frankfort, Ky. (Short, in North Am. Flora.) St. decumbent, about a span long, slender, stellately pubescent. Lvs. 6 - 12" long. Pedicels 6" long, and the silicle as large as the fruit of Coriander.

22. CAMELINA, Crantz. False Flax. (Gr. Xaμaί, dwarf, λivov, flax.) Calyx equal at base; petals entire; silicle obovate or sub-globous, with ventricous valves and many-seeded cells; styles filiform, persistent; seeds oblong, striate, not margined (0||). - Fls. small yellow.

C. sativa Crantz. Lvs. lanceolate, sagittate at base, subentire; silicle obovate-pyriform, margined, tipped with the pointed style.- In cultivated fields. St 1/2 - 2 1/2' high, straight, erect, branching. Lvs. roughish, 1 - 2' long, clasping the stem with their acute, arrow-shaped lobes. Fls. in paniculated racemes. Silicles 3-4" long, on pedicels 2 - 3 times as long. Said to be cultivated in Germany for the oil which is expressed from the seeds. Jn. § Eur.

23. SUBULARIA, L. Awlwort. (Named in reference to the linear-subulate leaves.) Silicle oval, valves turgid, cells many-seeded; stigma sessile; cotyledons linear, curved and incumbently folded on themselves.- Aquatic acaulescent herbs.

S. aquatica L. - A small plant, growing on the muddy shores of ponds in Mc. and N. H. Lvs. all radical, entire, subulate, an inch in length. Scape 2 - 3 high, ra-cemous, with a few minute white fls. on slender pedicels, only 2" in length. Jl.

24. IBERIS, L. Candytuft. (Most of the species are natives of Iberia, now Spain.) The 2 outside petals larger than the 2 inner; silicles compressed, truncate, emarginate, the cells 1-seeded. - Handsome herbs from the Old World, pretty in cultivation. Fls. white or purple.

1 I. umbellata L. Herbaceous, smooth; lvs. linear-lanceolate, acuminate, lower ones serrate, upper ones entire; silicles umbellate, acutely 2-lobed. - This and the following species are very popular garden annuals, very pretty in borders and of very easy culture. I. umbellata is from S. Europe. St. 1f high. Fls. purple, terminal in simple umbels, and like the rest of the genus remarkable for having the 2 outer petals longer than the 2 inner ones. Jn., Jl. †

2 I. amara L. Bitter Candytuft. Herbaceous; lvs. lanceolate, acute, somewhat toothed; fls. corymbed, becoming racemed; silicles obcordate, narrowly emarginate. - Native of England. St. 1f high. Fls. white. Jn., Jl. †

3 I. pinnata L. Herbaceous, smooth; lvs. pinnatiftd; rac. corymbous, but little elongated after flowering.- From S. Europe. Plant 1f high. Fls. white. Jn. - Aug. †

4 I. saxatilis L. Shrubby; lvs. linear, entire, somewhat fleshy, rather acute, smooth or ciliate; fls. in corymbs.- From S. Europe. Nearly 1f high. Fls. white. Apr. - Jn. † (Obs. - Twenty-four species of the Iberis have been described, others of which are less known, but equally ornamental with those above-mentioned.)

25. CAPSELLA, Vent. (Derived from capsa, a chest or box; alluding to the fruit.) Calyx equal at base; silicles triangular-cuneiform, obcordate, compressed laterally; valves carinate, not winged on the back; septum sublinear; style short; seeds ∞, oblong, small, 0||.- Fls. white. A common weed.

C. Bursa-pastdris Maench. Shepherd's Purse. - Found everywhere in fields and pastures, roadsides. St. 6 - 8 - 12' high, nearly smooth in the upper part, hirsute below, striate, branching. Root lvs. rosulate, 2 - 5 - 8' long, 1/4 as wide, cut lobed, on margined petioles, segm. about 13. These leaves are sometimes wanting (when the weed is crowded), or only dentate. Stem-lvs. much smaller, very narrow, with 2 small, acute auricles at base, half clasping the stem. Fls. small, in racemes, which are finally 3 - 12' long. Silicle smooth, triangular, emarginate at the end, and tipped with the style. Apr. - Sept. § Eur.

26. LEPIDIUM, R. Br. Pepper Grass. (Gr. a scale; from the resemblance of the silicle.) Sepals ovate; petals ovate, entire; silicles oval-orbicular, emarginate; septum very narrow, contrary to the greater diameter; valves carinate, dehiscent; cells 1-seeded. Cotyledons 0| (in No. 1, 0 = ). Fls. white, small, often incomplete.

1 L. Virginicum L. Wild Peppergrass. Tongue-grass. Lvs. linear-lanceolate, incisely serrate, or the upper subentire petals 4; silicles orbicular, emarginate; cotyledons 0||. - In dry fields and roadsides, U. S. St. rigid, round, smooth, 1/ high. Lvs. 1 - 2' by 1 - 3", acute, tapering at base into a petiole, upper ones sessile, lower pinnatifldly cut. Fls. and silicles very numerous, in a panicle of racemes. Fls. very small, mostly diandrous; silicles 1 1/3" diam., with a notch at the end. Taste pungent, like that of the garden peppergrass. Jn. - Oct.

2 L. ruderale L. Cauline lvs., incised, those of the branches linear, entire; fls-apelalous, and with but two stamens; silicles broadly oval, emarginate, wingless.- Dry fields, Mich., Ind., Mo. St. 10 - 15' high, diffusedly branched. Rac. many. Fls. remarkable for wanting the petals, which are always present in our other species.