230 ONAGRACEvE. ON AGRA. 



ANOGRA. 



Cr. pumilum Watson Proc. Am. Acad. Filiform stems 2-6 inches 

 high, somewhat strict, sparingly branched above: flowers less than a line 

 broad; capsule erect, very shortly pedicelled, lines long by half aline 

 broad or more; the numerous seeds oblique in the cells. Marshy place* 

 in the high mountains, from Washington to California. 



4 ONAGPA Adns. Fam. PI. ii, 85. 



Caulescent annual or biennial herbs with alternate leaves and 

 yellow nocturnal nowers,,that are erect before opening. Calyx- 

 tube more or less prolonged above the ovary, deciduous, segments 

 4, reflexed. Petals 4, equal obcordate to obovate sessile, yellow 

 changing to pink in age. Stamens 8, equal in. length. Stigma 

 deeply 4-cleft, its segments linear. Ovules and seeds horizontal, 

 inserted in two rows, rarely in several rows, prismatic -angled. 



0. Hookeri. 8 mall Bull. Torr. Club xxiii, 17'. CEnothe.ra Hookeri T. 

 ct* G. Fl. ?, 493. CE. Mennis of authors as to plants of our range. Stems 

 erect, usually stout and mostly simple, 1-5 feet high, canescently pubescent 

 and more or less hirsute or strigose : root often persisting for three or more 

 years: leaves lanceolate to ovate-lanceolate, 2-6 inches long, acute or 

 acuminate, repandly denticulate, the lowest petioled : Howers sessile, in a 

 leafy spike; calyx yillous, the tube twice the length of the ovary, rather 

 shorter than the slightly acuminate segments: petals obcordate, 6-12 lines 

 long, stigma linear; somewhat thickened : capsule if-12, lines long, more or 

 less pubescent or hirsute. Common along rivers, etc. \\ ashington to 

 California and the Rocky Mountains. 



6 AXOGRA Spach. Ann. Sci. Nat. (II; iv, 164. 



Annual or perennial caulescent herbs with alternate leaves 

 and axillary white, becoming rose-color, diurnal flowers that are 

 nodding in the bud. Calyx tube prolonged above the ovary, 

 deciduous. Stamens 8, equal. Style filiform ; stigma 4-lobed. 

 Capsule coriaceous or somewhat woody, dehiscing loculicidally, 

 4-valved. Ovules and seeds in 2 rows in each cell ascending, 

 not angled. . 



A. trichocalyx. Small 1. c (Enothera tricliocalyx Nvtt. Stems mostly 

 stout, 6-12 inches long, erect or decumbent at base, white and shining, 

 from a perennial base : leaves linear to oblong-lanceolate or rhomboidal, 

 2-4 inches long, acute or acuminate, attenuate to a long petiole, repandly 

 denticulate or sinuate-pinnatifid with irregular marginal segments or the 

 lowest entire: calyx very villous, the bud obtuse: tube slender, 6-18 lines 

 long, naked : petals about equalling the calyx : tube, very broad, entire or 

 deeply sinuous: capsule linear, tapering upward. 1-2 inches long : seeds 

 linear not punctate, subangled. Southeastern Oregon to California and 

 the Rocky Mountains. 



A. pal I ida Brltton Mem. Torr Club v. (Enothera albicaulis of authors 

 as to the plants in our range. Stems rather stout, 6-24 inches high, simple 

 or branched, white and often shreddy, from a perennial running root- 

 stock : leaves linear to oblong-lanceolate, 1-3 inches long, entire or repand- 

 denticulate, or sinuate-pinnatifid towards the base : calyx with the tips of 

 th'e segments free, the tube rather slender, 9-12 lines long, throat naked; 

 petals equalling or somewhat shorter than the tube, suborbicular, entire 

 or emarginate ; capsule linear, tapering upward, 1-2 inches long; seeds 

 lanceo-lineaf , smooth, subangled. On sandy plains, Brit. Columbia to 

 Oregon and Minnesota. 



