MUSTARD FAMILY. 183 



in. high, the foliage similar to that of S. glandulosus ; racemes rather dense, 

 second; (lowers flesh-color, 4 lines long; remote lower sepal distinctly, the 

 uppermost obscurely, unguiculate, all carinate and commonly hispid-ciliolate 



on the keel; petals with ample purple-veined crisped limb; upper pair of fila- 

 ments connate to near their scarcely divergent tips, their anthers small but 

 bearing pollen; pods slender, 2 in. long, f alcate-recurved ; seeds wingless. 



Near the coast from Marin Co. northward to Mendocino Co. June. 



8. S. hispidus Gray. Dwarfish, hispid throughout, branching, 3 to 6 in. 

 high; leaves obovate to connate-oblong, coarsely toothed, all sessile except the 

 very lowest ; sepals hispid with brownish hairs ; petals purplish with white 

 tips, 3 or 4 lines long; pods erect or ascending, \y 2 to 2 in. long, 1 line wide, 

 the pedicels short, about 1 line long; style short and stigma broad; seeds 

 elliptical, winged. 



Inner Coast Eange: summit of Mt. Diablo, Brewer, and southward to 

 Fresno Co. 



3. SISYMBRIUM L. 



Erect annuals with pinnatifid or finely dissected leaves, the base not clasp- 

 ing or auriculate. Flowers small, yellow. Sepals oblong or linear, equaling 

 or exceeding the claws of the petals. Pod linear or oblong, terete or nearly 

 so, the valves more or less distinctly 3-nerved; stigma sessile or the style very 

 short. Cotyledons incumbent. (Greek sisumbrion, the ancient name of some 

 plant of this family.) 



Leaves pinnatifid; seeds in one row 1. S. officinale. 



Leaves finely dissected; seeds in 2 rows 2. 5". canescens. 



1. S. officinale (L.) Scop. Hedge Mustard. Stem rigid, erect, 2 to 4 

 ft. high, with divaricate branches above; herbage a little rough-hispid; leaves 

 lvrately and often somewhat runcinately pinnatifid or pinnately parted with 

 dentate or coarsely toothed segments, petioled, the lowest rosulate and 4 to 10 

 in. long; flowers 1*/} to 2 lines in diameter; pods terete, 6 lines long, tapering 

 from base to summit, nearly sessile, closely appressed to the axis in a long- 

 slender raceme. 



Very common weed of waysides and waste places. Naturalized from Europe. 

 Apr. -May. 



2. S. canescens Nutt. Tansy Mustard. Nearly simple, % to 2 ft. high, 

 cinerous-tomentulose with short branching hairs, sometimes glabrate and green; 

 leaves pinnately or bipinnately dissected, thinnish and delicate; segments small, 

 elliptical or in the upper leaves linear-oblong; petals % to 1 line long, equaling 

 or exceeding the sepals; pods oblong to linear, acute at each end and beaked 

 with a very short style, 3 to 6 lines long, borne on slender spreading pedicels 

 of equal or greater length. — (S. pinnatum (Walt.) Jepson.) 



Livermore Valley, the upper San Joaquin Valley, southward to Southern 

 California and far eastward. Apr. 



4. CAKILE L. 



Maritime branching annual with fleshy leaves and rather small purplish or 

 white flowers. Pod fleshy, or when ripe, dry and corky, 1-celled, jointed in the 

 middle, the 2 joints 1-seeded, the upper joint at length deciduous, the lower 

 one persistent. Cotyledons accumbent. (Arabic name.) 



1. C. americana Nutt. Sea Rocket. Stems decumbent, often 2 ft. long; 

 leaves oblanceolate or narrowly obovate, crenate or shallowly sinuate-toothed; 



