1 , 8 Cruciferae 



divided, the segments lanceolate or linear-lanceolate, incisely 

 serrate; petals lanceolate-spatulate, surpassing the petals; pedi- 

 cels 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 ex- 

 pected within our range. 



22. ARABIS L. 



Annual or perennial, glabrous or pubescenl herbs with 

 entire, lobed or pinnatifid leaves and white or purple 

 flowers. Siliques Linear, elongated, compressed, with 

 smooth or keeled mostly L-nerved valves, not elastic, 

 dehiscent at maturity. Stigma nearly entire or 2-lobed. 

 Seeds in 1 or 2 rows in each cell, flattened, winged or 

 wingless. Cotyledons accumbent. 



* Seeds in 1 row in each cell. 



1. A. Virginica (L.) Trelease. Annual or rarely biennial, 

 glahrate; steins ascending or decumbent, 1.5-3 dm. high ; leaves 

 oblong, narrow, deeply pinnatifid, 2.5-7 cm. long, the lower 

 petioled, the upper nearly sessile; pedicels spreading or ascend- 

 ing, 4 mm. long in fruit; flowers very small, white; pods linear, 

 ascending, KJ-24 mm. long, about 2 mm. broad; seeds in 1 row 

 in each cell, nearly as broad as the pod, orbicular, wing-margined. 

 (A. Ludoviciana C. A. Meyer.) 



Inglewood in low ground. Our plants have the leaves often merely 

 dentate. March. 



2. A. repanda Wats. Biennial; stem stout, branching, 3 dm. 

 high or more, pubescent throughout with mostly stellate hairs, 

 usually longer and simple at base ; leaves narrowly obovate to 

 oblanceolate, 3-10 cm. long, sparingly toothed or nearly entire, 

 those of the stem narrowed to a winged petiole, acute or obtuse ; 

 flowers white, small ; petals narrow, 4 mm. long, slightly exceed- 

 ing the calyx; pods recurved-spreadin_', faintly l-nerved at the 

 base, seeds elliptic, broadly winged. 



Occasional in tin- upper portions of the pine belt in the San Gabrltl and 

 San Bernardino Mount alns 



