106 MUSTARD FAMILY 



long, •}-£ in. wide. Flowers minute, the sepals whitish but 

 petals wanting. Pods nearly flat, orbicular, notched at apex, 

 % in. across, short-pediceled. (L. apetalum of authors, not of 

 Willd.) — An annual weed, abundant in low valleys. 



5. SUBULARIA. Awlwort. 

 1. S. aquatica L. A compact glabrous plant, 1 to 4 in. high, 

 growing in water or mud. Leaves erect, entire, narrow, taper- 

 ing, 1 to 3 in. long. Racemes short, few-flowered (there are 

 also minute simplified flowers beneath the surface). Pods 

 subglobose or pear-shaped, % in. long, on short spreading 

 pedicels. — Reported from Crescent Lake (Congdon) and 

 Mono Pass (Bolander). 



6. CAPSELLA. 

 1. C. bursa-pastoris Moen. Shepherd's Purse. Stems 

 erect, 3 to 15 in. high, nearly glabrous. Basal 

 leaves petioled, deeply lobed to nearly en- 

 tire; upper leaves mostly entire, sessile by a 

 lobed base. Flowers white, minute, on spread- 

 ing pedicels in loose terminal racemes. Pods 

 flat, wedge-shaped, deeply notched at the 

 broad summit. — An introduced, annual weed 

 of Yosemite Valley, etc. 



7. RAPHANUS. Radish. 

 1. R. raphanistrum L. Jointed Charlock. Stems 1 or 2 

 ft. high, with very few but stiff hairs. 

 Leaves lyre-shaped, 3 to 6 in. long, the 

 upper ones smaller and only toothed. 

 Pedicels ascending, *4 to 3 A m - long. 

 Petals yellow or whitish, veiny (flower 

 y 2 in. across). Pods strongly constrict- 

 ed between the 4 to 8 seeds, long- 

 beaked. — Introduced annual weed of 

 lower Yosemite Valley. 



8. BRASSICA. Mustard. 

 Annuals, the larger lower leaves com- 

 monly pinnatifid, with the terminal lobe 

 the largest (lyre-shaped), the upper ones smaller and only 

 toothed or entire, clasping at base only in no. 3. Petals with 

 long claw and spreading yellow blade. Pods cylindric. 



1. B. nigra Koch. Black Mustard. Stems -)4 to 3 ft. high, 



