Mustard Family 177 



1. T. curvipes Hook. More or less hirsute, 2 dm. high or 

 more, branching above ; basal leaves rosulate, oblong, pinnatifid 

 with short blunt lobes or dentate ; upper leaves lanceolate, sag- 

 ittate-auriculate, clasping at base, 1-2 cm. long; pedicels very 

 slender, 3-6 mm. long, strongly recurved; capsule usually pubes- 

 cent; wings entire or crenate. 



Frequent on grassy slopes. March-April. 



2. T. laciniatus Nutt. Smooth or nearly so, and somewhat 

 glaucous, 2-4 dm. high ; leaves rather thin, the basal ones not form- 

 ing a rosette, linear, entire to deeply pinnatifid into narrow linear 

 segments, upper leaves entire, 20-25 mm. long, 2-4 mm. wide, 

 narrowed at base, racemes 10-20 cm. long; pods elliptic to orbic- 

 ular, 3-3.5 mm. in diameter, including the entire or slightly 

 crenate wing, reticulate, glabrous or sometimes somewhat pubes- 

 cent; pedicels slender, spreading and becoming more or less 

 deflexed. 



Occasional on shaded slopes in the canyons of the Santa Monica, San 

 Gabriel and Santa Ana Mountains, mostly below 3000 feet altitude. 



21. SOPHIA Adans. 



Annual or perennial herbs, canescent or pubescent 

 with short forked hairs, with slender branching stems, 

 2-pinnatifid or finely dissected leaves and small yellow 

 flowers in terminal racemes, these becoming elongated 

 in fruit. Calyx early deciduous. Style very short. 

 Siliques linear or linear-oblong, slender-pedicelled, the 

 valves 1-nerved. Seeds minute, oblong, wingless, in 1 or 

 2 rows in each cell. Cotyledons incumbent. 



1. S. pinnata (Walt.) Howell. Densely canescent through- 

 out, pale; stem erect, branched, 2-7 dm. high, slender, 'the 

 branches ascending; leaves 5-10 cm. long, oblong, 2-pinnatifid 

 into very numerous small, toothed or entire, obtuse segments ; 

 pedicels very slender, widely spreading, 10-15 mm. long; pods 

 horizontal or ascending, oblong or linear-oblong, somewhat com- 

 pressed, 6-8 mm. long, 2 rnm. wide, canescent or glabrous; seeds 

 in 2 rows in each cell. (Sisymbrium canescens Nutt.) 



Common in sandy soil in the foothills and valleys. April-June. 



2. S. incisa (Engelm.) Greene. Glabrous or somewhat glandu- 

 lar-hairy, 3-6 dm. high, freely branching; leaves pinnately 



