40 
CRUCIFERAE 
shaped. Petals purple or white, with a narrow crisped blade. Longer 
pairs of stamens with filaments more or less united. Pod narrowly linear. 
(Greek streptas, twisted, and anthos, flower, in reference to the petals.) 
1. S. glandulosus Hook. Jewel Flower. Simple or branching, 2.8 to 
5.7 dm. high; flowers nearly or quite 1.2 cm. long; sepals deep purple; 
petals purple, or white and purple; pods 4.8 to 7.2 cm. long, 2 mm. wide.— 
Hill and mountain sides. 
2. THELYPODIUM Endl. 
Coarse erect annuals or biennials. Basal leaves mostly petioled, those 
of the stem petioled or sessile-auriculate. Flowers white or pale yellow, 
rarely roseate, in often dense racemes. Petals with narrow claw and 
narrow or obovate limb. Pod terete, slender. (Greek thelus, female, 
and pus, foot or support, the ovary more or less stipitate.) 
1. T. lasiophyllum Greene. Stem simple or branching above, 2.8 to 
14 dm. high; herbage hispid or nearly glabrous; lower leaves pinnatifid, 
upper lanceolate, less lobed; flowers 3 to 4 mm. long; pods 4.8 to 9.6 cm. 
long, strictly deflexed or divaricate-spreading.—Open foothills, coastal 
S. Cal. and Coast Ranges. 
3. SISYMBRIUM L. 
Erect annuals with pinnatifid or finely dissected leaves (the base not 
clasping or auriculate). Flowers very small (1.5 to 2 mm. long), yellow. 
Sepals oblong or linear, equaling or exceeding the claws of the petals. 
Pod linear or oblong, terete or nearly so, more or less distinctly 3-nerved. 
(Greek sisumbrion, the ancient name for some plant of this family.) 
Pods subulate, closely appressed; seeds in 1 row.1. S. officinale. 
Pods oblong to linear, spreading; seeds in 2 rows.2. S. pinnatum. 
1. S. officinale (L.) Scop. Hedge Mustard. Roughish with short 
stiff hairs; stem erect, with widely diverging branches above, 5 to 11.5 
dm. high; leaves lyrately pinnatifid or pinnate, the segments dentate or 
coarsely toothed; pods 1.2 cm. long, tapering to summit, closely appressed 
to the axis of the raceme.—Naturalized weed, introduced from Europe. 
2. S. pinnatum (Walt.) Greene. Tansy Mustard. Stem 2.2 to 5.7 
dm. high; herbage finely ashy-tomentose; leaves pinnately or bipinnately 
dissected into thinnish and delicate small segments; petals 2 mm. long; 
pods oblong to linear, acute at each end, 6 to 12 mm. long, borne on 
spreading pedicels of equal or greater length.—Open country, coastal S. 
Cal. and e. and ne. 
4. RAPHANUS L. Radish 
Coarse much-branched herbs with lyrately pinnate or pinnatifid leaves 
or the uppermost merely toothed. Flowers large, purple, yellow, or 
white. Pod thick, beaked by the stout style, 1-celled, filled with spongy 
tissue, more or less constricted between the seeds and at last breaking 
into 1-seeded joints. (Greek raphanos, quick-appearing, on account of 
the prompt germination of the seeds.) 
1. R. sativus L. Radish. Plants 8 to 20 dm. high ; flowers about 16 
mm. broad.—Cult, from Eur., now naturalized in waste places. 
5. BRASSICA L. Mustard 
Annuals with lyrately pinnatifid or pinnate leaves (the upper disposed 
