238 Okdek 13.— CRUCIFERiE. 



2 A. maritimum Lam. Sweet Altssum. St. suffruticous and procumbent 

 at base ; Ivs. linear-lanceolate, acute, somewhat hoary ; pods oval, smooth. — 

 i( A sweet-scented garden plant, with fine 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 moon ; from the broad, 

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

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

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



1 B. rediviva L. Pekexnial Satin Flowek. St. erect, branching; Ivb. 

 ovate, cordate, petiolato, mucronately , serrate ; silicles lanceolate, narrowed at 

 each end. — y From Germany. Stem 2 — 3f high. Fls. light pnrple. Jn.f 



2 L. biennis DC. Hobestt. St. erect ; Ivs. with obtuse teeth ; silicles ovai, 

 obtuse at both ends. — d) Tliese are large, hairy plants, native of Germany. Sts. 

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

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



19. DRABA, L. Vf hitlow Grass. (Gr. Spdfirj, acrid, bitinsr ; from 

 the taste of the plant.) Calyx equal atba.se; 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 j^ellow. Plants small. 



5 EEOPHIT.A (DC.) PetnK " -iiL.d No. 1 



I DUAHA propyl-, retaldejii. ur tmty ein.irguiiite. (a) 



a Btylo long or sburt, but distinct. Plants perennial Nos. 2, 3 



a Style none Plants annual or biennial, (b) 



b Pedicel as long as or longer th.an the siliclo Nos. 4, B 



b Pedicel shorter than the siliclo Nos. 6, 7 



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

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

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

 to Va. Lvs. all radical, lanceolate, ^ — IJ' long, J as wide, with a few teeth 

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

 flowers. Cal. spreading. Petals cleft half way down. SiUcles 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, "VVilloughby, Tt., N. Y., Mich. Sts. several 

 from the s&me root, 6 — -8' high. Radical lvs. about 1' long, forming rosulate 

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

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

 appear double. May. 



3 D. ramosissima Desv. Minutely pubescent ; sts. numerous ; Ivs. 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, Ta., 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. Silicles 3" in length, ascending. Apr., May. 



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

 toothed ; pet. emarginate ; silicles 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. Rao. much elongated in fruit, with very long 

 pedicels. Fls. minute, yellowish-white. May. 



6 D. braohycdrpa Nutt. Minutely pubescent; radical lvs. roundish-ovate, 

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

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

 long as the pedicels, 10 — 12-seeded. — li Grassy places near St Louis, S. to La. 



