EVENING PRIMROSE FAMILY 



599 



stigma contortum pubens Small, Bull. Torr. Club 23:189 (1896). S. puiens Rydb. Bull. Torr. 

 Club 33:146 (1906). 



18. 0. andina Nutt. Stems several from the base, diffuse or ascending, 1 to 

 4 inches long; herbage finely puberulent or glabrate; leaf -blades linear, 4 to 7 lines 

 long, narrowed at base to a short petiole; flowers in the axils of the densely leafy 

 branches; calyx-tube I/2 to % line long; petals yellow, % to 1 line long; capsules 

 linear, a little narrowed upward, straight or nearly so, 3 to 5 lines long. 



Valleys and mountain slopes, 4000 to 6500 feet : Lassen and Modoc Cos. East 

 to Utah and Wyoming, north to Washington. June-July. 



Locs. — Shumway, Lassen Co., Austin 4r Bruce 2364; 

 Big Valley, Modoc Co., M.. S. Baker; Mt. Bidwell, Modoe 

 Co., Mantling 384. 



Eefs. — Oenothera andina Nutt.; T. & G. Fl. 1:512 

 (1840), type loc. "dry plains in the Eocky Mts., near 

 the Black-foot River", Nuttall; Jepson, Man. 685 (1925), 

 Sphaerostigma andinum Walp. Rep. 2:79 (1843). Oeno- 

 thera andina f. tripetala Levi. Monog. Onoth. 182 (1904), 

 type loc. not stated. 



19. 0. chamaenerioides Gray. (Fig. 261.) 

 Stems slender, 1 to several from the base, simple 

 or branched, erect or ascending, 6 to 11 inches 

 high; herbage glabrous or nearly so; leaf -blades 

 linear-oblong to oblong-ovate, entire or remotely 

 denticulate, I/2 to I14 inches long; flowers com- 

 monly few in very loose spikes, the spikes usu- 

 ally nodding; calyx-tube 1 line long; petals 

 white or pinkish, ^ to 1 line long; capsules fili- 

 form-linear, straight, ascending or even strict, 

 1^4 to 2 inches long. 



Sandy washes and mesas and dry mountain 

 slopes, 1400 to 7400 feet : Inyo Co. ; Mohave and 

 Colorado deserts to San Diego Co. East to 

 Texas, south to Lower California. Apr.-May. 



Locs.— Black Canon, White Mts., Duran 2672 ; Pleas- 

 ant Canon, Panamint Range, Hall 4" Chandler 6964; 

 Daggett, Mohave Desert, K. Brandegee ; Corn Sprs., 

 Chuckwalla Mts., Muyis 4- Keclc 4853; Yaqui Well (Ironwood Spr.), Colorado Desert, T. Brande- 

 gee; San Felipe, e. San Diego Co., T. Brandegee ; Vallecito, e. San Diego Co., Jepson 8560. 



Eefs.- — Oenothera chamaenerioides Gray, PI. Wright. 2:58 (1853), type loc. "stony hills 

 along the Rio Grande near El Paso", Wright; Jepson, Man. 685 (1925). Sphaerostigma chamae- 

 nerioides Small, Bull. Torr. Club 23:189 (1896). 0. deserti Jones, Contrib. West. Bot. 12:15 

 (1908), type loc. Needles, Jo7ies. Sphaerostigma deserti Hel. Muhl. 9:68 (1913). S. erythrum 

 Dav. Bull. S. Cal. Acad. 1:118, pi. 9 (1902), type loc. rocky slope of the San Francisco River, 

 Clifton, Ariz., A. Davidson. 0. erythra Mcbr. Contrib. Gray Herb. 65:41 (1922). 



20. 0. alyssoides H. & A. Stems several from the base, stout, spreading, or 

 often one, simple and erect, 4 to 21 inches high; herbage glabrous or sparingly 

 puberulent; bark exfoliating in broad strips, white and shining; leaf -blades nar- 

 row-ovate or lanceolate to narrow-obovate or oblanceolate, denticulate or entire, 

 % to 4 inches long, attenuate into a very short petiole or the basal with petioles l^ 

 to as long; flowers in spikes, the spikes densely many-flowered, nodding or coiled 

 at tip, or erect; calyx-tube tubular but a little widened upward, reddish, IV2 to 

 21/4 lines long; calyx reddish; petals white, fading pink, obovate to round-ovate, 

 very shortly clawed, 1% lines long; capsules strongly ridged on the angles and 

 thus quandrangular, or sometimes terete, little attenuate upward, recurved-con- 

 torted, 5 to 8 lines long, crowded on the axis. 



Sandy soil, 4000 to 5800 feet : east side of Sierra Nevada from Inyo Co. to 

 Modoc Co. North to Canada, east to the Rocky Mts. June-July, 



Fig. 261. Oenothera chamae- 

 nerioides Gray, a, habit, X % ; h, 

 long. sect, of fl., X 2 ; c, capsule, X 1. 



