280 CRUCIFERAE 
entire or dentate. Lower leaves on long leaf-stalks, pear-shaped in general 
outline, but deeply cut by sinuses into more or less feather-form Apex 
broadly rounded. Flowers rather large, pods cylindric with 4 angles, 
nearly parallel with the stem. Common in waste places. 
2. B. juncea, (L.) Cosson, Inpian Musrarp. Plant smooth or 
slightly hairy, 1 to 4 ft. high. Upper leaves without leaf-stalks, borders 
mostly entire. Lower leaves on long foot-stalks, broad and cut by sinuses, 
but less deeply, as a rule, than those in No. 1. Flowers similar to No. 1. 
Seed pods slender, the beak being nearly or quite 1/3 as long as the re- 
mainder of the pod. Pods more or less spreading. Naturalized. Common 
in waste places and fields. June-Nov. 
3. B. arvensis, (L.) BSP. Wirp Mustarp. Similar to last but 
leaves egg-shaped and much less deeply cut by sinuses. Pods rather 
thick, somewhat constricted between the seeds. Naturalized. Common, 
May-Nov. 
4. B. campestris, L. Turnip. The ruta-baga or turnip of the gar- 
dens is occasionally found wild and sometimes persists in grounds in 
which it has been cultivated. 
13. SINAPIS, L. 
Plant erect, branching, hairy. Lower leaves on long stalks, in general 
outline pear-shaped, but deeply cut by sinuses, the terminal lobe broad, 
rounded, toothed, the lateral lobes toothed, Upper leaves without leaf 
stems but cut and toothed. Pods long, constricted between the seeds, 
densely hairy. : 
S. alba, L. Wuire Mustarp. Plant 1 to 2 ft. high, covered with 
hairs which turn backward. WNaturalized. In waste places. 
14. ERYSIMUM, L. 
Erect herb with narrow lance-shaped leaves, with entire or slightly 
dentate margins. Pods 4-angled, seeds in one row in each valve of the 
pod. 
E. cheiranthoides, L. (Fig. 7, pl. 54.) Wormsrep. TREACLE-MUS- 
TARD. Plant 3 to 2 ft. high, branching. Leaves lance-formed, narrow, 
tapering at. base, somewhat blunt at apex. Naturalized. In moist places. 
June-Aug. 
Flowers yellow, white or purple 
Seeds in a single row in each valve of the pod. 
15. SISYMBRIUM, L. 
Tall erect herbs, sparingly branched, with feather-formed leaves. 
Flowers yellow except in S. humile, in which they are white or pink. 
Pod rather long (in No. 2, very long) and slender, 
1. S. officinale, (L.) Scop. (Fig. 3, pl. 54.) Hepat MusrTarp. 
Rather tall and stiff, branching below, not much branched above. The 
long pods hug the stem, lying in almost their whole length against it. 
Leaves rather long, in general form more or less triangular or arrow- 
head-shaped, the lobes toward the inner end extending widely. Flowers 
small. 
