224 ONAGRACE^. (Enothera. 



Central and Southern California : at Larken's station, east of San Diego {Palmer) ; Fort Mo- 

 have (Cooper) ; also by irallacc, and others. Flowers fragrant. 



4. (E. trichocalyx, Nutt. A very similar species in appearance, glabrous or 

 canescently puberulcnt or somewhat villous : root annual : stem mostly erect, often 

 stout, a span high : calyx very villous, the tips of the lobes not free in the bud : 

 petals large, usually with a deep sinus : capsule thickened toward the base : seeds 

 ovate-oblong, somewhat compressed. — Torr. & Gray, Fl. i. 494. (E. deltoidea, 

 Torr. in Fremont Eep. 315 j Watson, Bot. King Eep. 107. 



Chiefly eastward of the Sierra Nevada from Northern California to Arizona and New Mexico ; 

 Fort Mohtve {Cooper) ; also in Corral Hollow and Tulare Plain, Brewer. 



% % :» Acaulescent or nearly so: floivers large, axillary, erect in hud, opening by day: 

 capsule ovate or ovate-oblong, mostly sessile: seeds large, in 2 roios in each cell. 



5. (E. Ccespitosa, ISTutt. Glabrous or usually more or less villous with spread- 

 ing hairs : root apparently biennial : leaves oblong to narrowly oblanceolate, on 

 long petioles, usually irregularly sinuate-toothed or repand-denticulate, often some- 

 what pinnatilid : calyx-tube 2 to 7 inches long, the tips of the lobes not free in the 

 bud : petals white or rose-color, broadly obcordate, f to If inches long : capsules 

 ovate-oblong, attenuate above, usually sessile, 1 to 14 inches long, strongly ribbed 

 on the sides and with a thick more or less tuberculate crest on each side of the 

 sutures : seeds 1| lines long, oval-oblong, with a narrow groove along the ventral 

 side, minutely tuberculate on the back. — Sims, Bot. Mag. t. 1593. ffi". montana & 

 (E. marginata, Nutt. in Torr. & Gray, Fl. i. 500 ; Hook. f. Bot. Mag. t. 5828. 



Near Carson City {Anderson, Stretch) ; Oregon {Nevius) ; and frequent eastward to the Upper 

 Missouri, Nel)raska and New Mexico. 



('). CB. triloba, Nutt. Nearly glabrous : root annual or biennial : leaves nar- 

 rowly oljlanceolate, often large, usually irregularly pinnatifid with narrow lobes : 

 calyx-tube 2 to 4 inches long, the tips of the lobes free in the bud : petals yellow, 

 broadly obovate, | to 1|- inches long, somewhat 3-5-nerved: capsule sessile, ob- 

 long to obovate with more or less broadly winged angles, 9 to 15 lines long, usually 

 somewhat beaked above, the sides ribbed and at length net-veined : seeds a line 

 long, angled and minutely tuberculate. — Hook. Bot. Mag. t. 2566. 



Sierra Valley [Mrs. Ames, Lemmon) ; Truckee Valley {Watson) ; Oregon {Nevius); and east- 

 ward to the Saskatchawan, Colorado and Texas. 



§ 2. Calyx-ttdie filiform above the ovary, somewhat persistent: stamens opjjosite to the 

 2)etals shorter ; anthers oval or oblong : stigma capitate : capside sessile, ovate- 

 oblong to linear, someu'hat 7nembranaceous : seeds ascending, in 2 roivs in each 

 cell : floivers yelloic, erect in bud and the tij^s of the lobes not free: acaulescent. 

 — Taraxia. 



7. CE. Nuttallii, Torr. & Gray. Canescently pubescent : root biennial or peren- 

 nial : leaves narrowly oblanceolate, 2 to 6 inches long, petioled, deeply sinuate-pin- 

 natitid ; the numerous very unequal segments usually rounded or obtuse : calyx- 

 tulie 1 to 2i inches long : petals about half an inch (5 to 9 lines) long : capsules 

 rai't'ly developed, narrow, attenuate upward, 6 to 10 lines long, obtusely 4-sided : 

 seeds oblong, terete, a line long, obscurely lined.- — Fl. i. 506. (E. tanacetifoUa, 

 Torr. k Gray, Pacif. E. Eep. ii. 121, t. 4; Watson, Bot. King Exp. 110. 



At the eastern base of the Sierra Nevada, from Carson City {Anderson, Stretch, &c.) to the 

 Columbia Pdver. 



CE. BREVIFLORA, Torr. & Gray. A similar species, but nearly glabrous, flowers smaller and 

 shorter, and segments of the leaves acute or acutish : seeds more numerous, half a line long. — 

 Oregon {Nevius) to W. Wyoming and Colorado ; may be found in the northern part of the State. 



8. CE. heterantha, Xutt. Nearly glabrous : root biennial or perennial : leaves 

 oljlong-lauceolate, acute or acuminate, entire or slightly repand-denticulate, 6 inches 



