16 CRUCIFEE^. 



* 'Calyx not irregular. 



1. S. barbiger, Greene. Slender, 11^ ft. high, pubscent or gla- 

 brous; cauline leaves linear, entire, scarcely auriculate: fl. subsessile, 

 3 lines long: sepals greenish, the rather acuminate tips becoming 

 whitish-petaloid and recurved, the whole calyx commonly bristly-hairy, 

 but often glabrous: petals white: filaments dark purple, the three 

 pairs very unequal, the uppermost connate almost to the summit, their 

 anthers much reduced and seemingly sterile : pods 12 in. long, nar- 

 rowly linear, recurved. In Napa Co., near St. Helena. 



2. S. suffrutescens, Greene. Perennial, suffrutescent, the stout leafy 

 trunk 6 8 in high; flowering branches 1 2 ft. long: herbage glabrous, 

 glaucous: stem-leaves cuneate-obovate, coarsely serrate-toothed; floral 

 leaves round-cordate or more elongated: sepals purplish-green, their 

 tips not reflexed: one pair of filaments connate; all the anthers equal 

 and fertile. Hood's Peak, Sonoma Co., Bioletti. 



Calyx irregular, three sepals more or less connivent behind the upper 

 petals, the fourth separated from these and somewhat defiexed; 

 1 pair of filaments connate. 



3. S. niger, Greene. Branching loosely from near the base and above, 

 1 3 ft. high, glabrous, glaucous: leaves linear, 2 3 in. long, the lowest 

 with narrow pinnate gland-tipped lobes or teeth, the upper entire, auric- 

 ulate-clasping : racemes loose, fiexuous: pedicels ascending, 1 in. long: 

 calyx 3 lines long, of a very dark metallic shining purple; sepals ovate-cymbi- 

 form, the 3 upper slightly separated from the lowest, and connivent at 

 apex: blade of petals, very slender, white: upper pair of filaments 

 connate almost throughout, their anthers small and sterile: pod 2 in. 

 long, erect or ascending, nearly straight: seed narrowly winged. Hills 

 at Tiburon. 



4. S. albidns, Greene. Stouter than the last, equally glabrous and 

 glaucous, even the cauline leaves with callous-tipped prominent teeth, 

 the base sagittate-clasping: racemes not fiexuous: pedicels short: 

 sepals .3 4 lines long, white, with purple base:, petals % in- long, the 

 lamina ample, crisped, white, with purple veins: upper pair of filaments 

 united to the tip, their anthers small but polliniferous- On hillsides not 

 far from San Jose. 



5. S. Mildredae, Greene. Slender, 11^ ft - ni g n > more or less pilose- 

 hispid: lower leaves coarsely and sinuately toothed; cauliue linear- 

 lanceolate, entire, clasping: racemes somewhat flexuous, not secund: 

 fl. small, very dark metallic-purple: petals with small, slenderly atten- 

 uate white-margined purple blade: upper pair of filaments almost wholly 

 united, their anthers mere rudiments closely approximate, the other 4 

 stamens much shorter and little unequal: pods 3 in. long, slender. 



