238 Order 13.— CRUCIFERiE. 



23. SUBULARIA, L. Awlwort. (Named in reference to tho 

 linear-subulate leaves.) Silicle oval, valves turgid, cells many-seeded ; 

 stigma sessile ; cotyledons linear, curved and incumbently folded on 

 themselves. — CD Aquatic acaulesccnt herbs. 



S. aquatica L. — A small plant, growing on tho muddy shores of ponds in Me. and 

 N. H. Lvs. all radical, entire, subulate, an inch in length. Scape 2 — 3' high, ra- 

 ceinous, with a few minute white Us. on slender pedicels, only 2" in length. JL 



24. 1BERIS, 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 ; silkies 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. If 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 f 



2 I. amara L. Bitter Candytuft. Herbaceous; lvs. lanceolate, acute, some* 

 what toothed ; fls. corymbed, becoming racemed ; silicles obcordate, narrowly 

 emarginate. — (J) Native of England. St. If high. Fls. white. Jn., Jl. f 



3 I. pinnata L Herbaceous, smooth; lvs. pinnatifid; rac. corymbous, but 

 little elongated after flowering. — .T) From S. Europe. Plant If high. Fls. 

 white. Jn. — Aug. f 



4 I. sax itilis L. Shrubby ; lvs. linear, entire, somewhat fleshy, rather acute, 

 smooth or ciliate ; fls. in corymbs. — CD From S. Europe. Nearly If high. Fls. 

 white. Apr. — Jn. f (Obs. — Twenty-four species of the Iberis have been des- 

 cribed, others of which aro less known, but equally ornamental with those 

 above-mentioned.) 



25. CAPSELLA, Vent. (Derived from capsa, a chest or box ; allud- 

 ing to the fruit.) Calyx equal at base ; silicles triangular-cuneiform, 

 obcordate, compressed laterally ; valves carinate, not winged on tho 

 back ; septum sublinear ; style short ; seeds oo, oblong, small, 0||. — 

 Fls. white. A common weed. 



C. Bursa-pastoris Msench. 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, £ as wide, 

 cut lobed, ou margined petioles, segm. about 13. These leaves are sometimes 

 wanting (when tho 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 tho end, and tipped with the style. Apr. — Sept. § Eur. 



26. LEPIDIUM, R. Br. Pepper Grass. (Gr. aI-ic,, a scale; from 

 the resemblance of the silicle.) Sepals ovate ; petals ovate, entire ; 

 ftilicles oval-orbicular, emarginate ; septum very narrow, contrary to the 

 greater diameter; valves carinate, dehiscent ; cells 1-seeded. Cotyledons 

 0\ (in No. 1, = ). Fls. white, small, often incomplete. 



* Stamens 2 only. Petals 4, or wanting Nos. 1, 2 



* Stamc-ns 6. Silicles winged Nos. 3, 4 



1 L. Virginicum L. "Wild PEPPERGRAsa Tongue-grass. Lvs. linear-lanceo- 

 late, incisely serrate, or the upper subentiro petals i ; silicles orbicular, emarginate ; 

 cotyledons 0[.— -<D In dry fields and roadsides, U. S. St. rigid, round, smooth, 1/ 



