*238 ORDER 13. CRUCIFER^S. 



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. (D Aquatic acaulescent herbs. 



S. aquatica L. A small plant, growing on the muddy shores of ponds in Me. 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; Ivs. 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. 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; Ivs. lanceolate, acute, some- 

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

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



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

 little elongated after flowering. CD From S. Europe. Plant If high. Fls. 

 white. Jn. Aug. f 



4 I. saxatilia L. Shrubby ; Ivs. 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 are 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 cariuate, not winged on the 

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

 Fls. white. A common weed. 



C. Buraa-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 Ivs. rosulate, 2 5 8' long, \ 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, 

 emargmate at the end, and tipped with the style. Apr. Sept. Eur. 



26. LEPIDIUM, R. Br. PEPPER GRASS. (Gr. ASTT^, a scale ; from 

 the resemblance of the silicic.) 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. 



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



* Stamens 6. Silicles winged , Nos. 3, 4 



1 I*. Virginicum L. WILD PEPPERGRASS. TONGUE-GRASS. Lvs. linear-lanceo- 

 late, incisely serrate, or the upper subentire petals 4 ; silicles orbicular, emarginate ; 

 cotyledons 0|. (Din dry fields and roadsides, U. S. St. rigid, round, smooth, If 



