70 
Crucifer*. 
45. Erysimum. Erysimum. XV, 39. 
1. Peduncles 2—3 times as long as the cal. FIs small.— 
Fields on the Swiss plateau, here and there; T. V. B. 
J. Z. S. cheiranthoides L. 167. 
— Peduncles at most as long as the cal. FIs of moderate 
size, or large ........ 2 
2. Peduncles as long as the cal. Hairs on the Is all of the 
same form, 3-fid. Type of E. hieracifolium L. . 3 
— Peduncles V 2 — 1 /s the length of the cal. Hairs on the 
Is almost all simple (or attached by the centre, the 
two ends spreading along the surface). Type of E. Cheir- 
anthus ......... 4 
3. Ls almost entire. E. longisiliquosum Schleide. Siliquas 
6—8 cm long). —Stony places, road sides; lower Enga- 
dine, Wall. 6.virgatum Roth. 168. 
— Ls sinuate-dentate. FIs rather darker and smaller.— 
— Stony places; formerly at the base of the vertical 
rocks of the Creux du Van. 6 strictum FI. Wett. 169. 
4. Branches of the rt-stock elongated, creeping. Siliquas 
compressed 4-cornered. Ls green, linear-lanceolate, 
slightly toothed.—Rubbish-slips in the Jura (Dole, Chasse- 
ral, Creux du Van). 6 . . ochroleucum Dec. 170. 
— Branches of the rt-stock short, crowded. Siliquas almost 
reg. 4-cornered ....... *5 
5. L.-axils with small barren branches, covered with small 
ls.—Waste ground; Gr. T. 6 . . rhaeticum Dec. 171. 
— L.-axils without barren branches.—b. pumilum Gaud. 
(Cheiranthus Koch). Stem only 5—10 cm; fr.-raceme short. 
Styles shorter.—As the last; G. T. W. b High Alp. 
(Engadine, Zermatt). 6 . . . helveticum Dec. 172. 
46. Brassica. Brassica. XV, 39, 40. 
1. Ls all petioled. Fr.-peduncles (and siliquas) erect. Sili¬ 
quas 15—25 mm long. Seed blackish. Sinapis nigra L. 
Black mustard.—Rubbish heaps, road sides; rare (natura¬ 
lised). 6. — Erucastrum incanum has a thickened ped¬ 
uncle, and a beak with 1—2 seeds at the base 
nigra Koch. 173. 
— Upper ls. sessile. Fr.-peduncles spreading. Siliquas 60 
to 100 mm long. Seeds brown .... 2 
2. Upper ls narrowed or rounded at the base. Seps erect 
applied-closed. Racemes already elongated at the com¬ 
mencement of flowering.— Cultivated in many varieties; 
Cabbage, Kohl-rabi, Cauliflower. 4, 5 t oleracea L. 174. 
— Upper ls clasping, the base deeply cordate. Seps spread¬ 
ing, half open or at last horizontal. Type of B. campestris 
3 
