366 BOTANICAL GAZETTE [November 



with white in Argemone is noticeably absent in Enomegra. Argeynone mter- 

 media and Enomegra hipinnatifida are often associated in the field but are 

 never confused. The veriest tyro distinguishes them almost as far as he can 

 see them, as I have repeatedly proven. Even children before breaking them 

 down say ''yellow" (sap), '* white>" "yellow," "white." etc. Possibly the 

 genus is monotypic but I rather suspect not. In either case some of the 

 characters given above are specific rather than generic. Collectors too often 

 make inadequate notes, and even in plants of this family the color of the sap 

 is not mentioned. I have not collected personally the second of the species 

 that follow. 



\ 



if 



Enomegra bipinnatifida, n . comb. — Argemone hipinnatifida 

 Greene, Pitt. 3 ; 346. 



Enomegra hispida, Aven Nelson, Key Rocky Mt. FL 27. 

 Argemone hispida Gray, PI, Fendl. 5. 



Draba Tiber, n. sp. — Stems several to many from a short branched 

 caudex, moderately stout, 1-2'^'" high (including the long fruit- 

 ing racemes), lightly pubescent with mostly simple hairs: basal 

 leaves densely rosulate on the crowns, oblanceolate, 1-2 ^^'^ long, 

 tapering into a short petiole or subsessile, moderately stellate- 

 pubescent as are also the stem leaves ; stem leaves few, oblong, 

 sessile but neither auriculate nor clasping : inflorescence crowded 

 in fruit as well as in flower; flowers yellow, small: sepals sub- 

 glabrous: petals spatulate, 4—6^"^ long: fruiting from near the 

 base up, the dense raceme leafless and ebracteate above the 

 middle: pedicels stoutish, ascending, about 5"^™ long: pods 

 lanceolate, 10-12'"'" long, puberulent with mostly simple hairs, 

 24-36-seeded, usually strongly twisted; style evident (i 

 stoutish, glabrous. 



In habit this species simulates D, streptocarpa Gray, but in some of the 

 floral and fruit characters it is most nearly allied to D, siirculifera Aven Nel- 

 son. From the latter it dififers in the smaller leaves, long crowded fruiting 

 raceme, narrower petals, more numerous seeds, and the denser and more uni- 

 form pubescence. D. surctdifera occupies shaded slopes, under cliffs and 

 trees in subalpine stations, while D. uber is found on open alpine slopes. 

 Type no, 7875, Telephone mines, August r, 1900. 



Lesquerella macrocarpa, n. sp. — Moderately stellate-pubescent 

 throughout; freely branched from crown of a slender taproot; 

 the branches decumbent-spreading with assurgent tips, 7-15^™ 

 long: crown leaves from orbicular to obovate, 7-20'""' long, 



mm 



