162 XUL CRUCIFERZ. i Draza, 
high, very branching. Silicles 2—3” broad, very numerous. A well known 
garden salad. July. +§ 
4. DRABA. 
Gr. dpaGn, acrid, biting ; from the taste of the plant. 
Calyx equal at base; petals equal; filaments without teeth; silicle 
oval-oblong, entire, the valves flat or convex; cells 2, many-seeded ; 
seeds not margined. 
1. D. verna. (Eriophila vulgaris. DC.) Whitlow Grass. 
Scape naked; lvs. oblong, acute, subserrate, hairy; pet. bifid; stig. sessile ; 
silicle oval, flat, shorter than the pedicel—qd) A little early-flowering plant in 
grassy fields, Can. to Va. Leaves all radical, lanceolate, 4—1}’ long, } as - 
wide, with a few teeth towards the end. Scape a few inches high, with a 
raceme of 5—15 small, white flowers. Calyx spreading. Petals cleft half 
way down. Silicles about a line wide and 3—4” long, with deciduous valves. 
Apr. May. 
- . 2. D. arapisans. Michx. (Arabis. Ph.) 
St. leafy, somewhat branched and pubescent; Jws. lanceolate, acutely den- 
tate ; silicle oblong-lanceolate, smooth, longer than the pedicel; sty. very short.— 
Lake shores, among rocks, Vt., N. Y., Mich. Stems several from the same 
root, 6—8’ high. Radical leaves 1’ or more in length, attenuate at base, with 
a few slender, spreading teeth; cauline leaves somewhat clasping. Flowers 
white, in a short raceme. Silicle elongated (13’ long), acuminate, contorted, 
and might be called a silique. May. 
3. D. Carouiniina. Walt. (D. hispidula. Michz.) : 
St. leafy at base, hispid, naked and smooth at the top; dvs. ovate-rdundish, 
entire, hispid ; silicles linear, smooth, longer than the pedicels, corymbose.—@) 
Sandy fields, Conn., Dr. Robbins, R. I., Mr. G. Hunt, 8.to Ga. Stem 1—3’ high, 
very hairy. Leaves clustered on the lower part of the stem, very hairy. 
Petals white, twice as long as the sepals. Silicle 3/ long, lance-linear, many- 
seeded. Stigma subsessile. Apr. Jn. 
4. D. ramosissima. Desv. (Alyssum dentatum. Nutt.) 
Minutely pubescent; sts. numerous; /vs. linear-lanceolate, with remote and 
slender teeth, upper ones entire; rac. corymbosely paniculate ; silicle lanceo- 
late, about the length of the pedicel, and tipped with the style 3 as long.—2}| On 
rocks, Harper’s Ferry, Va., west to Ky. Stems slender, 4—10/ long, with 
tufted leaves at top. Leaves about 1’ long, with 1 or 2 teeth on each side. 
Flowers white. Silicles 3—5” in length, ascending. Apr. May. 
5. D. nemorduis. Ehrh. 
St. pubescent, branched; Jvs. oval, hirsute, cauline lanceolate, toothed ; 
pet. emarginate ; silicles oblong-elliptical, the length of the pedicels; sds. nearly 
30.—2| Mich. Mo. Plant slender, 8—10’ high. Stem with few branches. 
Leaves mostly radical. Racemes much elongated in fruit, with very long 
pedicels. Flowers minute, yellowish white. May. 
6. D. cunerrouia. Nutt. 
Hirsute-pubescent ; s¢. branching and leafy below ; dvs. sparingly toothed, 
radical spatulate-oblong, cauline few, oblong, ovate, somewhat attenuate at 
base ; vac. rather elongated in fruit; silicles oblong-lanceolate, minutely hispid, 
twice as long as the pedicels; pet. emarginate. T. g- G.—2, Grassy places 
about St. Louis, &c., Nuitaill. Plant 3—8’ high. Flowers much larger than 
in the preceding. Petals white, nearly thrice longer than the sepals. Silicles 
about 3’ long and 30-seeded. March, Apr. 
7. D. pracnycarpa. Nutt. 
Minutely pubescent; radical lvs. roundish-ovate, petiolate ; cawline oblong 
or linear, slightly dentate or entire; 7ac. many flowered, straight, elongated in 
fruit; pet. obovate, entire; silicle oval, glabrous, about as long as the pedicels, 
10—12-seeded.— 2. Grassy places near St. Louis, Stem much branched and 
leafy. Silicles 2—3” long, March, Apr. 
