236 Oedbe 13.— CBtlCIPEEiE. 



2 A. maritimum Lam. Sweet Altssum. St. suffrutioous 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 Alysaum 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. Pbken-nial Satin Floweb. St. erect, branehihg; Ivs. 

 ovate, cordate, petiolate, mucrouately serrate; silicles lanceolate, narrowed at 

 each end.—'H From Germany. Stem 2 — 3f high. Fls. light purple. Jn.f 



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

 obtuse at both ends. — @ 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 remarliable feature of the plants. May, Jn.f 



19. DRA6A, L. Whitlow Gbass. (Gr. ^paPrj, acrid, biting ; from 

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

 without teeth ; silitlo 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. 



S Ekophiia (DC). Petals 2-partcd J No. 1 



§ Draba proper. Petals entire or only einargiiiiit.;. (a) 



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



a Style none Plants annual or biennial, (b) 



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



b Pedicel shorter than the silicle Noa. 6,7 



1 D. (Er6pliila) verna L. "Whiilow Grass. Scape naked; lvs. oblong, 

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

 the pedicel. — (I) A little, early-flowering plant in grassy flelds, rather rare. Can. 

 to Ta. Lvs. all radical, lanceolate, J — IJ' long, -J- 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. Silicles about a line wide 

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



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

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

 short hut distinct. — Lake shores, "Willoughb^, Yt., N. T., Mich. Sts. several 

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

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

 white, in a short raceme. Sihcles 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., TV. 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. Fla. white. Silicles 3" in length, ascending. Apr., May. 



4 D. nemor^lis Ehrh. St. pubescent, branched; lvs. oval, cauline, lanceolate, 

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



■seeds nea/rly 30.— Mich., Mo. Plant slender, 8 — 10' high. St. with "few 

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

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



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

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

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

 long as the pedicels, 10 — l2-seeded. — 2| Grassy places near St. Louis, S. to La. 



