MUSTARD FAMILY. 



215 



reduced anthers; pods curved, more or less spreading on short 

 pedicels, glabrous or hispid, 2 to 3 in. long, 1 line wide; seeds 

 elliptical, narrowly winged. — (S. Bioletti, Mildreds, albidus, and 

 pulchellus of Greene.) 



Common in the mountains at middle altitudes, or at the highest 

 altitudes in the hills. 



7. S. secundus Greene. Either simple or with slender branches 

 10 to 18 in. high, the foliage similar to that of S. glandulosus; 

 racemes rather dense, secund; flowers 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 filaments connate to 

 near their scarcely divergent tips, their anthers small but bearing 

 pollen; pods slender, 2 in. long, falcate-recurved; seeds wingless. 



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

 June. S. pulchellus Greene is intermediate between this and S. 

 glandulosus. 



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; petals purplish with white tips, 3 or 



4 lines long; sepals hispid with brownish hairs; pods erect or ascend- 

 ing, H to 2 in. long, 1 line wide, the pedicels short, about 1 line long; 

 style short and stigma broad; seeds elliptical, winged. 



Summit of Mt. Diablo, Brewer, May 14, 1862, southward to 

 Fresno Co. 



3. SISYMBRIUM L. 



Erect annuals with pinnatifid or finely dissected leaves, the base 

 not clasping or auriculate. Flowers small, yellow. Sepals oblong 

 or linear, equaling or exceeding the claws of the petals. Silique 

 linear, 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 the Mustard 

 Family.) 



Leaves pinnatifid; seeds in one row . . . 1, 8, officinale. 



Leaves finely dissected; seeds in 2 rows 2. S. pinnatum. 



1. S. officinale (L.) Scop. Hedge Mustard. A little roustfi- 

 hispid with scattered hairs; stem rigid, erect, 3 to 4 ft. high, with 

 divaricate branches above; leaves lyrately 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. Apr. -May. 



2. S. pinnatum (Walt.). Tansy Mustard. Cinerous-tomentu- 

 lose with short branching hairs, sometimes glabra te and green, 

 | to 2 ft. high; leaves pinnately or bipinnately dissected, thinnish 



