160 BRASSICACEAE. 



racemes. Stamens 6, tetradynamous or rarely only 4. 

 Capsule compressed, orbicular, 1-celled, 1-ovuled, inde- 

 hiscent, winged; the wings entire crenate or perforated. 



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, sagittate- 

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

 3-6 mm. long, strongly recurved; capsule usually pubescent; 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 orbicular, 

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

 reticulate, glabrous or sometimes somewhat pubescent; 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. 



22. 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 throughout, 

 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 compressed, 6-8 mm. 

 long, 2 mm. 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 glandular- 

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

 segments lanceolate or linear-lanceolate, incisely serrate; petals 

 lanceolate-spatulate, surpassing the petals; pedicels 4-6 mm. long, 

 spreading, exceeded by the spreading or curved-ascending, nearly 

 or quite glabrous capsule; seeds in 1 row in each cell. 



Frequent in the pine belt of the San Bernardino Mountains, and 

 to be expected within our range. 



