236 ORDER 13. CRUCIFERJE. 



2 A. marftimum Lam. SWEET ALTSSUM. St. suffruticous and procumbent 

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

 2 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 L. rediviva L. PERENNIAL SATIN FLOWER. St. erect, branching; Ivs. 

 ovate, cordate, petiolate, mucronately serrate; silicles lanceolate, narrowed ai 

 each end, 14 From Germany. Stem 2 3f high. Fla light purple. Jn.f 



2 L. biennis DC. HONESTY. St. erect ; Ivs. with obtuse teeth ; silicles oval, 

 obtuse at both ends. (D These 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. WHITLOW GRASS. (Gr. dpa/3r/, 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. 



EKOPHILA (DC.). Petals 2-parted No. 1 



DRABA proper. Petals entire or only emargiuate. (a) 



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



a Style none Plants annual or biennial, (b) 



b Pedicel as long as or longer than the silicic Nos. 4, 5 



b Pedicel shorter than the silicle Nos. 6, T 



1 D. (Er6phila) verna L. WHITLOW GRASS. Scapo naked; Ivs. oblong, 

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

 the pedicel. (D 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. Scapo a few inches high, with a rac. of 5 15 small, whito 

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

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



2 D. arabisans MX. St. leafy, erectly branched, pubescent; Ivs. 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 Ivs. about 1' long, forming rosulato 

 tufts at the top of the short radical shoots ; cauline 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, 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. Silicles 3" in length, ascending. Apr., May. 



4 D. nemoralis Ehrh. St. pubescent, branched; Ivs. 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. ,vith a few 

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

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



5 D. brachycarpa Nutt. Minutely pubescent ; radical Ivs. 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-seeded. U Grassy places near St. Louis, S. to La. 



