EVENING PRIMROSE FAMILY 



601 



Mohave Desert: Daggett, K. Brandegee; Kane Springs wash, Jepson 15,528; Needles, Jones 

 3828. Inyo Co.: Bradbury Well, Mum ^ EitchcocTc 11,000. 



Kefs. — Oenothera refracta Wats. Proc. Am. Acad. 17:373 (1882), type loc. "near the 

 Colorado" (Eiver), Bigelow ; Jepson, Man. 686 (1925). Sphaerostigma refractum Small, Bull. 

 Torr. Club 23:192 (1896). 



22. 0. leptocarpa Greene. Stem stout, simple or with few virgate ascending 

 branches, II/2 to 3 feet high, the branches ending in few-flowered spikes; herbage 

 glabrous; leaf -blades lanceolate in outline, unequally dentate or pinnatifid, 1 to 3 

 inches long, mostly short-petioled, the cauline leaves very sparse and the upper 



much reduced, those of the basal rosette dis- 

 appearing early; calyx- tube almost none; 

 sepals reflexed; stamens 8, those alternate the 

 petals with oblong anthers, those opposite 

 with smaller globose anthers ; petals rhombic- 

 ovate, light yellow, turning pink, 3 to 5 lines 

 long; capsules linear, quadrangular, imper- 

 fectly 4-celled, strongly refracted, 2 to 3% 

 inches long. 



Dry sandy hill slopes, flats or washes, 500 

 to 3000 feet: San Luis Obispo Co. and the 

 southern Sierra Nevada in Kern Co. south to 

 San Diego Co. and the Colorado Desert. East 

 to Arizona, south to Lower California. Mar.- 

 June. 



Locs. — San Luis Obispo Co.: San Luis Obispo, 

 Condit. Coastal S. Cal. : Santa Barbara, Mum 9323 ; 

 Arroyo Seco, San Gabriel Mts., Peirson 349 ; San Ber- 

 nardino Valley, Jepson 5545 ; Riverside, Jepson 1215 ; 

 Vie j as Valley, K. Brandegee ; Dahesa, near San Diego, 

 Mary Spencer 60. Sierra Nevada in Kern Co. : lower 

 Kern River Canon (Am. Jour. Bot. 16:256). Mohave 

 Desert: Providence Mts. (Am. Jour. Bot. 16:256). 

 Colorado Desert: Shavers Well, Hall 6242; Palm 

 Sprs. of San Jacinto, Schellenger; San Felipe Nar- 

 rows, C. V. Meyer 27; Mountain Sprs. (grade e. of), 

 e. San Diego Co., Newlon 384. 



Refs. — Oenothera leptocarpa Greene, Pitt. 1: 

 302 (1889). Euloius calif ornicus Nutt.; T. & G. Fl. 



1:515 (1840), type loc. San Diego, Nuttall; Jepson, Man. 687 (1925). 0. californica Greene, Pitt. 



1:290 (1889); not O. californica Wats. (1876). 0. eulobus Levi. Monog. Onoth. 231 (1904). 



0. crassifolia var. leptocarpa Levi. I.e. 209 (1904). 



23. 0. pterosperma Wats. Stems slender, erect and simple or branched from 

 the base, 2 to 5 inches high ; herbage more or less short-hispidulose ; leaves mostly 

 cauline, the blades oblong-lanceolate to ovate-lanceolate, entire, short-petioled or 

 sessile, 2I/2 to 10 lines long; flowers axillary; pedicels capillary, 2^ to 4 lines long; 

 calyx-tube about 1 line long; petals pinkish-white, obcordate, % to 1^/4 lines long, 

 equaling the sepals; capsules cylindric-clavate, slightly curved, 5 to 8 lines long; 

 seeds flattened, oblong, % line long, with revolute minutely tuberculate wing-like 

 margin. 



Foothills, 4200 feet: Inyo Co. North to Oregon, east to Nevada and Utah. 

 May-June. 



Loc. — West of Bishop (Am. Jour. Bot. 15:226). 



Refs. — Oenothera pterosperma Wats. Bot. King 112, pi. 14, figs. 4-7 (1871), type loc. 

 Trinity Mts., nw. Nev., Watson 424. Chylismia pterosperma Small, Bull. Torr. Club 23:193 

 (1896). Sphaerostigma pterospermum Nels. Bot. Gaz. 40:63 (1905). 



24. 0. kernensis Munz. Kern Sun-cup. (Fig. 263.) Stem simple and erect, 

 or with few ascending branches above the base, rather equably and somewhat 



Fig. 262. Oenothera refracta Wats. 

 a, upper part of plant, X % ;fe, long. sect, 

 of fl., X 1% ; c, deflexed capsule, X 1. 



