OF ARTS AND SCIENCES. 255 



Lesquerella Palmeri. Pubescence dense, stellate-lepidote ; 

 caudex simple, apparently biennial, the simple stems a foot high or 

 more: basal leaves narrowly oblanceolate, repand, the cauline nar- 

 rower and mostly entire : petals spatulate, 3 lines long : pods pubes- 

 cent, ovate-globose to broadly ellipsoidal, erect on long spreading or 

 ascending pedicels ; style as long as the pod ; cells 2-4-ovuled. — 

 Arizoua {Palmer, 1872; cult, at Washington); Topo canon, Lower 

 California (O. B. Orcutt, 1884). 



Lesquerella Douglasii. Resembling L. Ludoviciana, but the 

 pods smaller, obovate and very obtuse, erect upon the spreading pedi- 

 cels, and the cells only 2-ovuled : lower leaves sometimes ovate upon 

 a narrow petiole. — Vesicaria Ludoviciana, Hook. Fl. Bor.-Am. 

 1. 48, as to habitat; Torr. Bot. Wilkes, 232. On the Columbia River 

 east of the Cascade Mountains (Wilkes, Lyall, Suksdorf); Wallowa 

 Mountains, eastern Oregon (Cusich). First collected by Douglas, 

 but locality not given. 



Lesquerella (?) Wardii. A procumbent and very compactly 

 lepidote biennial (?), with short stems ; radical leaves round-ovate on 

 slender petioles, the cauline short, linear- to obovate-spatulate : pods 

 elliptical, somewhat obcompressed, acute or acutish, the valves very 

 convex, lh to 2J lines long, erect on short spreading pedicels; septum 

 oblong; cells 2-4-ovuled; style a line long or more: seeds somewhat 

 turgid and irregular, the long radicle more or less curved to one side. 

 — Arizona, on the Aquarius Plateau, at 11,000 feet altitude (L. F. 

 Ward, 1875). An abnormal species. 



Lesquerella (?) cinerea. Like the last in habit : sepals narrow, 

 3 lines long ; petals 4 lines long, with a very broad undulate claw 

 somewhat contracted below the rounded blade : ovary elliptical, acute, 

 obcompressed; cells 12-ovuled (mature fruit unknown). — Arizona, 

 locality not given (Palmer, 1869). Like the last abnormal in its ob- 

 compressed pod, and perhaps to be transferred, when better known, 

 to Physaria. 



Draba * subsessilis. Perennial, dwarf, densely cespitose, the 



* The North American species of Draba, exclusive of the Mexican, are the 

 following : — 



§ 1. Erophila, Lindbl. Petals bifid. — A stellate-pubescent scapose winter- 

 annual, with coarsely toothed or entire leaves, white flowers and many-seeded 

 round-oval to oblong pods. Erophila, DC. 



1. D. verna, Linn. — E. vulgaris, Americana, etc., DC. Naturalized from the 

 Atlantic to Minnesota and Missouri, and at Vancouver, W. T. Identical with 

 European forms. 



