286 Order 13.— CRUCIFEILE. 



2 A. marftimum Lam. Sweet Alyssum. St. suffruticous and procumbent 

 at base; lvs. liuear-lanceolate, acute, somewhat hoary; pods oval, smooth. — 

 If. A sweet-scented garden plant, with fino leaves and small white flowers. 

 St. a foot in length. Fls. from Jn. to Oct. — All the species of Alyssum are of 

 easy culture in common loamy soils, f. 



18. LUNARIA, L. Honesty. (Lat. luna, the inoon ; from the broad, 

 round silieles.) Sepals somewhat bisaccate at base; petals nearly en- 

 tire ; stamens without teeih ; silicle pedicellate, elliptical or lanceolate, 

 with flat valves ; funiculus adhering to the dissepiment (0 = ). 



1 L. rediviva L. Perennial Satin Flower. St. erect, branching; lvs. 

 ovate, cordate, petiolate, mucronately serrate; silieles lanceolate, narrowed at 

 each end. — 2£ From Germany. Stem 2 — 3f high. F1& light purple. Jn.f 



2 L. biennis DC. Honesty. St. erect ; lvs. with obtuse teeth ; silieles oval, 

 obtuse at both ends. — © These are large, hairy plants, native of Germany. Sts. 

 3 — 4f high. Lvs. cordate. Fls. lilac-colored. The broad, round, silvery 

 silieles are the most remarkable feature of the plants. May, Jn.f 



19. DRABA, L. Whitlow Grass. (Gr. dpdfirj, acrid, biting ; from 

 the taste of the plant.) Calyx equal at base; petals equal ; filaments 

 without teeth ; silicle oval or oblong, entire, the valves flat or slightly 

 convex, veined; seeds not margined, 2-rowed in each cell (0=). — Fls. 

 white, rarely yellow. Plants small. 



6 Ekophila (DC). Petals 2-parto<l No. 1 



§ Dbaba proper. Petals entire or only einarginate. (a) 



a Style long or short, but distinct. Plants perennial Nos. 2, 3 



a Style none Plants annual or biennial, (b) 



b Pedicel as lung as or longer than the silicle Nos. 4, 5 



b Pedicel shorter than the'silicle Nos. 6, T 



1 D. (Erophila) verna L. "Whitlow Grass. Scape naked; lvs. oblong, 

 acute, subserrate, hairy ; petals bifid ; stig. sessile ; silicle oval, flat, shorter than 

 the pedicel. — CD A little, early-flowering plant in grassy fields, rather rare, Can. 

 to Va. Lvs. all radical, lanceolate, \ — \\' long, £ as wide, with a few teeth 

 towards the end. Scape a few inches high, with a rac. of 5 — 15 small, white 

 flowers. Cal. spreading. Petals cleft half way down. Silieles about a line wide 

 3" long, with deciduous valves. Apr., May. 



2 D. arabisana Mx. St. leafy, erectly branched, pubescent; lvs. lanceolate, 

 minutely dentate; silicle oblong-lanceolate, smooth, longer than the pedicel; sty. 

 short but distinct. — Lake shores, Willoughby, Vt., N. Y., Mich. Sts. several 

 from the same root, 6 — 8' high. Radical lvs. about 1' long, forming rosulate 

 tufts at the top of the short radical shoots ; cauline somewhat clasping. Fls. 

 white, in a short raceme. Silieles elongated (4 — 6 '), twisted when ripe so as to 

 appear double. May. 



3 D. ramosissima Desv. Minutely pubescent ; sts. numerous ; lvs. linear- 

 lanceolate, with remote and slender teeth, upper ones entire ; rac. corymbously 

 paniculate ; silicle lanceolate, about the length of the pedicel, the style half as long. 

 — On rocks, Harper's Ferry, Va., "W. to Ky. Sts. slender, 4 — 10' long, the bar- 

 ren ones •with tufted leaves at top. Lvs. about 1' long, with one or two teeth on 

 each side. Fls. white. Silieles 3" in length, ascending. Apr., May. 



4 D. nemoralis Ehrh. St. pubescent, branched; lvs. oval, cauline, lanceolate, 

 toothed; pet. emarginate; silieles oblong-elliptical, half the length of the pedicels ; 

 seeds nearly 30. — Mich., Mo. Plant slender, 8 — 10' high. St. with a few 

 branches. Lvs. mostly radical. Rac. much elongated in fruit, with very long 

 pedicels. Fls. minute, yellowish- w r hite. May. 



5 D. brachycarpa Nutt. Minutely pubescent ; radical lvs. roundish-ovate, 

 petiolate, cauline oblong or linear, slightly dentate or entire ; rac. many-flowered, 

 straight, elongated in fruit ; petals obovate, entire ; silicle oval, glabrous, about as 

 long as the pedicels, 10 — 12-^eeded. — 11 Grassy pkcea near St Louis, S. to La. 



