I iiue 3 ( '• 1910 



bi less rugose or irregularly pitted." The light ones are some- 

 what more plentiful, but both colors are well represented. 



Sphaerostigwa nevadense (Kellogg) 



Oenothera Nevadensis Kellogg, Proc. Cal. Acad. '2: 227. 



/.' 70. 1S62. 

 Sphaerostigma tortuosa A. Nelson, Proc. Biol. Soc. Wash. 



17: 95. 1904. 



Oenothera gauraefiora var. vermiculata Jones, Cont. West. 

 Bot. 12: 16. 1908. 



1 With cover illustration,) 



'( lenothera Nevadensis. — (Kellogg.) Fig. 70. 



Stem robust, sub-decumbent, six to eight inches high, glab- 

 rous below, minutely strigulose pubescent above, strongly de- 

 current angled. 



Lower leaves oblong-lanceolate, irregularly and also coarsely 

 erose-repand-dentate, petioles short, sub-winged and expanding 

 at the base, sparingly strigulose throughout, veiny, upper bract- 

 oid leaves lance-linear, corneously acute, on very slender peti- 

 oles, about the same length as the lamina, or three or four times 

 the length of the ovary; slightly scabrulose and minutely strig- 

 ulose throughout. 



Flowers small, white, in a dense, obtuse terminal leafy 

 spike, neither circinate nor drooping. Calyx tube linear-funnel- 

 form, somewhat ridged, scarcely shorter than the ovary, seg- 

 ments carinate, (or from a closely reflexed base erect beyond the 

 middle) as long as the tube; petals ovate or obovate on a short 

 claw; stamens somewhat unequal, mostly slightly exsert; an- 

 thers oblong, fixed by the middle, versatile; stigma sub-capitate 

 scarcely a little longer. 



Capsules sessile, subulate tapering from a broad base, qiiad- 

 rangularly or strongly four-ridged, valves one-nerved, scabrulose 

 and strigose puberulent, arcuately tortuose; seeds oblong ascend- 

 ing. 



This plant belongs to the subdivision Sphaerostigma^ and 

 is closely allied to Oenothera gauraefiora; but that has linear- 

 lanceolate veinless leaves, and vellow flowers; the bracts, also, 



