Mustard Family 175 



racemes. Stamens 6. Style none or very short. Sili- 

 cles oval, obcompressed, the valves strongly 1-nerved. 

 Seeds numerous in each cell. Cotyledons incumbent or 

 accumbent. 



1. H. procumbens (L.) Desv. Branching from the base, 

 slender, ascending or procumbent, 5-20 cm. long; lower leaves 

 short-petioled, pinnatifid, lobed, dentate or sometimes entire, 

 1-2.5 cm. long ; uppear leaves sessile or nearly so, entire or lobed ; 

 pedicels slender, ascending or spreading, 6-12 mm. long in fruit; 

 pods elliptic or oval, obtuse, rarely emarginate, 3-4 mm. long. 

 (Capsella divaricata Walp.; C. elliptica Meyer.) 



In moist saline places throughout our range. March-April. 



17. BUBSA Weber. SHEPARD'S PURSE. 



Erect annual herbs, pubescent with forked hairs. 

 Basal leaves tufted. Flowers racemose, small, white. 

 Silicles cuneate-obcordate, obcompressed, the valves 

 keeled. Style short. Seeds numerous in each cell, 

 marginless. Cotyledons accumbent. 



1. B. Bursa-pastoris (L.) Britton. Erect, branching, 15-40 cm. 

 high, pubescent below, mostly glabrous above; basal leaves 

 lobed or pinnatifid, forming a rosette, 5-12 cm. long; cauline 

 leaves few, lanceolate, auricled, dentate or entire; flowers 2 mm. 

 broad ; pedicels slender, spreading or ascending, 10-14 mm. long 

 in fruit; pods triangular, more or less deeply emarginate at the 

 apex, rarely truncate, 4-6 mm. long. (Capsella Bursa-pastoris 

 Medic.) 



Common weed in gardens and waste places. Flowering at all times of the 

 year. 



18. DRABA L. 



Low tufted mostly stellate-pubescent herbs, with sea- 

 pose or leafy stems, simple leaves and racemose flowers. 

 Silicles elliptic, oblong or rarely linear, compressed. 

 Stigma entire or nearly so. Valves dehiscent nerveless. 

 Cotyledons accumbent. 



