CRUCIFER^. 47 



Var. a. genuina. Stem solitary^ rather leafy ; leaves with oh- 

 tuse lobes ; flowers large. 



Var. /S. cheiranthifiora. Gren. et God. Steins slender, with 

 few leaves ; lobes of the leaves acute ; flowers small. 



Var. 7. montana, DC. Stems short, numerous, not leafy; 

 flowers deep yellow. Annual or biennial ; June- August. 



A stray plant or plants were found at Chelsea ; probably in- 

 troduced with coals or iron from South Wales. Sea-coast. The 

 two varieties a and /3 are probably British. Var. 7 is an alpine 

 plant, of Switzerland, etc. 



Eruca. — Annual or biennial plants, with lyrate or pinnatifid 

 leaves and white flowers, veined with violet. Sepals erect, not 

 gibbous at the base, closely applied. Pod oblong, nearly cylin- 

 drical, hairy, with convex, keeled valves, and a single prominent 

 nerve. Beak compressed, ensiform, smooth, without a seed at 

 its base. 



S. sativa. Stem spreading, much branched, smooth. Leaves 

 slightly fleshy, smooth, lyrate-pinnatifid ; the upper narrow, ob- 

 long, and toothed. Claws of the petals very long. Pods erect, 

 not closely applied to the stem, hairy or glabrous (we have only 

 noticed hairy pods) . The pods are usually spinous ; the beak 

 flattened and smooth, except on the margin, Avhich has spinous 

 fringes ; beak large, smooth, compressed. 



Fields and waste places in France. Annual. June-Septem- 

 ber. Very abundant at Wandsworth Steam-boat Pier for several 

 years. 



DiPLOTAXTS, DC — Annual, biennial, or perennial plants, with 

 pinnate-pinnatifid, or toothed, or sinuated leaves. Sepals slightly 

 spreading, equal at the base. Stigma discoid ; style compressed. 

 Pod linear -compressed (4-cornered) ; valves convex, with a single 

 dorsal nerve ; beak short, conical. Seeds in one or in two rows, 

 ovate, not winged. 



D. tenuifolia, DC. Narrow-leaved Wall Mustard. — e.b. 525. 

 Sinapis tenuifolia. — l.b.s. 120. 



A. 14. C. 30. Lat. 50-57°. Alt. 0-100 yds. Tem. 52-48°. 



Root perennial, woody. Stems erect or ascending, branching 

 and leafy, glabrous or nearly so. Leaves usually pinnatifid, with 

 oblong, elongated lobes, rarely simple and sinuate; the upper 

 often entire. Pedicels much longer than the flowers. Flowers 



