224 ONAG-RACE^E. (Enothera. 



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

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



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

 canescently puberulent 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. 434. CE. deltoidea, 

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



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

 Fort Mohave (Cooper) ; also in Corral Hollow and Tulare Plain, Brewer. 



* * % Acaulescent or nearly so: flowers large, axillary, erect in bud, opening by day: 

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



5. CE. caespitosa, Nutt. 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 pinnatifld : 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 1 J 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. CE. inontana & 

 CE. 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, Nebraska and New Mexico. 



6. CE. triloba, Nutt. Nearly glabrous : root annual or biennial : leaves nar- 

 rowly oblanceolate, 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 J inches long, somewhat 3 — 5-neived : 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 Saskatchaw-an, Colorado and Texas. 



§ 2. Calyx-tube filiform above the ovary, somewhat persistent : stamens opposite to the 

 petals shorter ; anthers oval or oblong : stigma capitate : capsule sessile, ovate- 

 oblong to linear, somewhat membranaceous: seeds ascending, in 2 rows in each 

 cell: flowers yellow, erect in bud and the tipis 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- 

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

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

 rarely developed, narrow, attenuate upward, 6 to 10 lines long, obtusely 4-sided : 

 seeds oblong, terete, a line long, obscurely lined. — Fl. i. 506. CE. tanacetifolia, 

 Torr. & Gray, Pacif. B. Bep. 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 Paver. 



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 "VV. Wyoming and Colorado ; may he found in the northern part of the State. 



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

 oblong-lanceolate, acute or acuminate, entire or slightly repand-denticulate, 6 inches 



