184 PROCEEDINGS OF THE AMERICAN ACADEMY 



yellow flowers on short pedicels, an oblong carapanulate calyx, and 

 deflexed siliques. The locality assigned by Nuttall is " Forests of the 

 Rocky Mountains." An imperfect specimen gathered " on the Col- 

 orado " by Dr. Newberry may be of this species. Otherwise it is 

 wholly unknown to me. I suppose it can be neither the foregoing nor 

 the following species. 



6. S. TORTuosus, Kellogg, in Proceed. Calif. Acad. 2, p. 152, t. 46, 

 wood-cut. S. cordatus, Torr. Bot. Whippl. Exped. Pacif. R. R. Surv., 

 p. (65) 9, not of Nutt. Flowers purple, on slender (spreading or 

 ascending) pedicels, in a lax raceme, the lowermost often leafy-bracted, 

 half an inch long ; the (ovate) buds and the sepals usually long-acumi- 

 nate. Siliques, according to Dr. Kellogg's figure and description, nar- 

 rowly linear and falcately recurved-spreading. Seeds, according to 

 Dr. Kellogg's description, wing-margined. Leaves entire or denticu- 

 late, the cauline cordate-clasping and mostly appearing as if perfoliate. 

 Stem paniculately branched. — Dr. Kellogg's uncharacteristic name for 

 this species refers only to the areolation of the septum of the silique. — 

 California, on the Yuba River, Dr. Bigelow ; and " the Copper region 

 of the Sierra Nevada, Mr. C. D. Gibbs," Dr. Kellogg. The habitat is 

 remote from that assigned for his S. cordatus by Nuttall, who, more- 

 over, could never have omitted to notice the taper-pointed flower-buds 

 and sepals, so conspicuous in Dr. Bigelow's specimens and Dr. Kel- 

 logg's figure. But I must remark that two specimens in Dr. Torrey's 

 herbarium, collected in California by Mr. Gibbes (I presume the per- 

 son who supplied Dr. Kellogg) have flowers with nearly obtuse buds 

 and sepals, but in size and all other respects like the S. tortuosus. The 

 " wing-margined seeds," noted by Dr. Kellogg, who alone has seen the 

 fruit, should aid in distinguishing this species from the next. 



7. S. Breweri, n. sp. (Gray in Proceed. Calif. Acad, ined.) 

 Flowers purple, on veiy short ascending pedicels, the lowest often leafy- 

 bracted ; the buds a quarter of an inch long, obtuse or barely acute ; the 

 sepals with scarious but recurved blunt tips. Siliques narrowly linear, 

 ascending or erect, straight or slightly incurved (Ig- - 2^ inches long, less 

 than a line wide), compressed, but torulose, the nerve of the valves ob- 

 scure. Seeds wholly marginless. Glaucous, annual, branched from 

 near the base. Cauline leaves, except the lowest, strongly cordate- 

 clasping with a closed sinus, entire or denticulate, the uppermost sagit- 

 tate. California; collected in the State Geological Survey by Prof. 

 William H. Brewer, at three stations, under the following forms: — 



