186 PROCEEDINGS OF THE AMERICAN ACADEMY 



glabrovis, tapering at the summit into a distinct style. Seeds wingless. 

 In Nuttall's original specimens all but the lower pedicels and also the 

 calyx are glabrous : in those of Coulter and of Xantus they are hispid, 

 especially the pedicels. They have, in the fruit, a strongly 2-lobed 

 stigma. In Nuttall's the stigma is only emarginate. — Southern part 

 of California. 



11. S. HiSPiDUS, n. sp. (Gray in Proceed. Calif. Acad, ined.) 

 Very dwarf (2 or 3 inches high, from an annual root), hispid through- 

 out, even to the siliques. Leaves cuneate or obovate-oblong, coarsely 

 toothed or incised, the cauline sessile, but hardly at all clasping. Ra- 

 ceme short and loosely flowered : pedicels spreading or at length 

 recurved, but the linear compressed siHques (1^ inch long and a line 

 wide) are erect. Stigma emarginate, almost sessile. Immature seeds 

 winged. The flowers resemble those of the preceding species. The 

 anthers are rather short for this genus, only linear-oblong, and blunt ; 

 but the longer filaments are connate. The whole body of the petal is 

 a long, linear lamina, the base of which is contracted into a narrow 

 claw. — California ; on the dry summit of Monte Diablo, coll. Wil- 

 liam H. Brewer, California State Geological Survey. 



-1— -1— -1— -)— Sparingly hirsute with simple hairs or nearly glabrous : 

 cauline leaves not clasping nor auriculate at the base, the lower 

 sinuate or pinnatifid and contracted at the base into a margined 

 petiole. Flowers yellowish or greenish-white. 



12. S. FLAVESCENS, Hook. Ic. t. 44. Flowers ascending: calyx 

 cylindraceous. Siliques erect, glabrous or sparingly hairy, teretish, 

 pointed Avith a distinct style. Seeds probably wingless. — California. 

 A very large or luxuriant form of this was gathered at the coal-mine 

 near Monte Diablo by Dr. Brewer, 2 or 3 feet high, the lower leaves 

 runcinate, the " greenish-white " flowers half an inch long ; siliques 

 half-grown. 



* * Flowers sessile or nearly so. Stem fistulous-inflated. 



13. S. CRASsiCAULis, Torr. in Stansbury, Rep. Salt Lake Exped. 

 p. 384, 1. 1. Leaves mostly radical, runcinate-pinnatifid. Calyx woolly. 

 Petals dark purple. Silique unknown. — Utah. 



Doubtful Species. 



S. REPANDUS, Nutt. in Torr. & Gray. Fl. 1, p. 77, of the EucKsia 

 section, from Santa Barbara, California, is known only from Nuttall's 

 brief character. 



