606 ONAGRACEAE 



Kofs. — GAYoriiYTiM DirrtsuM T. & G. Fl. 1 :513 (1840), type loc. "Rocky Mts. and plains 

 of Oregon", NuttaU; Trel. Rep. Mo. Bot. Card. 5:110, pi. 19 (1894) ; .Tcpson, Fl. W. Mid. Cal, 

 ed. -, -S4 (1901), Man. (iSS, fij;. G70 (1925). Ocnatlirra //(njoplnjtnm ract- trtlca.sutna f. diffusa 

 LtWl. Monop. Onoth. 169 (1904). G. diffusum var. villosum Munz, Am. Jour. Bot. 19:773 (1932), 

 type loc. Farewell Bend, Crook Co., Ore., Lciberg 435. 



2. G. ramosissimum T. & G. Similar in habit to no. 1, ^/2 to S^^ feet high; 

 herbajre trlabroiLs or puberulent; flowor-biuls mostly apiculate; flowers tardily or 

 weakly hcliotropic; calyx-lobes reflexed-spreading, all distinct; petals sub-orbicu- 

 lar, white, obscurely g:reenisli-yellow at base, in age turning brick-red, y2 to 1 line 

 long ; ovary with short spreading hairs ; pedicels about I/4 to as long as cap.sules. 



Dry soil, mountain flats or slopes, 2500 to 9000 feet: Southern California 

 mountains; Sierra Nevada from Tulare Co. to eastern Siskiyou Co.; North Coast 

 Ranges from Lake Co. to western Si.skiyou Co. North to Washington, east to 

 South Dakota and New INIexico; Chile, Argentina. May- July. 



Locs. — S. Cal.: Cuyamaca Lake, San Diego Co., K. Brandegcc ; Palomar Mt., Esther Hew- 

 lett Gl ; Tahquitz Valley, San Jacinto Mts., Jepson 2298; Mill Creek Caiion, San Bernardino Mts., 

 D. L. Crawford 941; Arrowhead Lake, San Bernardino Mts., Braunton 1038; Vincent Gulch, San 

 Gabriel Mts., Peirson 2483; Mt. Wilson, Peirson 130. Sierra Nevada: North Fork Middle Tula 

 River, Jepson 4695; Big Cottonwood Mdw., w. Inyo Co., Jepson 930; Junction Camp, Kern 

 Canon, Jepson 1060; Marble Fork Kaweah River, Jepson 691; Lundy, Mono Co., Minthorn 28; 

 Huntington Lake, Fresno Co., Jepson 12,965 ; Mono Ranger Mdw., Mono Creek, Fresno Co., Jep- 

 son 13,227; Yosemite Valley, Jepson 8360; Hetch-Hetchy, Jepson 3441; Leevining Creek, Mono 

 Co., Ottlcy 1093; Deadman Creek, Middle Fork Stanislaus River, Jepson 6553; Silver Valley, 

 Alpine Co., Jepson 10,100 ; Tahoe, Jepson 8077 ; Summit sta., Nevada Co., Jepson 14,440 ; Martin 

 Sprs., Eagle Lake, Brown 4' Wieslander 2; Pine Creek, Lassen Co., Baker Sr Nutting; McCloud, 

 Siskiyou Co., Jepson 5744. North Coast Ranges: Snow Mt., Lake Co., Purpus 1224; Soldier 

 Ridge, Yollo Bolly Mts., Jepson 14,438; Grouse Mt., Humboldt Co., Tracy 4850; Devils Back- 

 bone, sw. Siskiyou Co., Jepson 2102 ; Sisson, Siskiyou Co., Jepson 14,435. 



Var. obtusum Jepson. Plants 5 to 12 inches high; herbage glabrous; ultimate branchlets 

 filiform, sparsely leafy; flower-buds minute, globose, obtuse; petals white, turning red, % line 

 long, scarcely exceeding the calyx-lobes. — Valleys, 4750 to 5800 feet: eastern slopes of the Sierra 

 Nevada, Inyo Co. to Modoc Co. June-Aug. 



Locs. — Long Valley, Inyo Co., K. Brandegee ; Truckee, T. Brandegee ; Dixey Valley, Lassen 

 Co., Baker 4' Nutting ; Willow Creek Valley, Modoc Co., E. M. Austin; Ft. Bidwell, Modoc Co., 

 Manning 236. 



Refs. — Gayophytum ramosissimum T. & G. Fl. 1:513 (1840), tvpe from "Rocky Mts.", 

 Nuttall; Trel. Rep. Mo. Bot. Gard. 5:111, pi. 20 (1894) ; Jepson, Fl. W. Mid. Cal. ed. 2, 284 

 (1911), Man. 688, fig. 671 (1925) Oenothera ramosi^sima Nutt. ; T. & G. I.e. as synonym. 

 Oenothera gayophytum race treleasiana f. ramosissima Levi. Monog. Onoth. 169 (1904), in part. 

 G. nuttallii T. & G. Fl. 1:514 (1840), type from "Rocky Mts.", Nuttall. Oenothera micrantha 

 Nutt.; T. & G. Fl. 1:514 (1840) as synonym. 0. gayophytum race phillippiana f. roiusta Levi. 

 I.e. 169 (1904). G. nuttallii var. ahramsii Munz, Am. Jour. Bot. 19:772 (1925), type loc. Cold- 

 water Canon, San Antonio Mts., Los Angeles Co., Ahrams 2694. G. ramosissimum var. pygmeum 

 Jepson, Man. 689 (1925), type loc. Bullfrog Lake, Fresno Co., Jepson 850a; dwarf plants, 1 inch 

 high. Var. obtusum Jepson, Man. 688 (1925), type loc. Beckwith Pass, Lassen Co., Jepson 

 7755 (not 2755). 



3. G. lasiospermum Greene. Similar to G. diflfusum; petals rose-color, chang- 

 ing to purplish, 1/2 to % line long. 



Dry open slopes and ridges, or open pine forests, 500 to 7300 feet : mountains 

 of coastal Southern California; Tehachapi Mts., thence north through the Sierra 

 Nevada to Modoc Co. ; White Mts. ; Humboldt Co. to Siskiyou Co. North to Wash- 

 ington, east to Montana and Wyoming. June-Sept. 



Locs. — Coastal S. Cal.: Cuyamaca Mts., Palmer 99; Palomar Mt., Chandler 5360; Straw- 

 berry Valley, San Jacinto Mts., Hall 2279; Seymour Creek, Mt. Pinos, Hall 6689. Tehachapi 

 Mts.: Ft. Tejon, Coville 1180; Bisses sta., Dudley 373. Sierra Nevada: Kelty Mdw., Madera Co., 

 Kennedy; Fresno Big Trees, Jepson 15,981; Emerald Bay, Lake Tahoe, Wiggins 5076; Bucks 

 Valley, Plumas Co., Jepson 10,645; Mt. Bidwell, Warner Mts., Jepson 7863. White Mts.: Silver 

 Canon near Big Prospector Mdw., Jepson 7355. North Coast Ranges: Willow Creek, Trinity 

 River valley, Tracy 3491; Trinity Summit, Tracy 5248; Siskiyou Co., Butler 163. 



Var. hoffmannii Munz. Pubescence of short spreading hairs. — Occasional with the species. 



Locs. — Cuyamaca, T. Brandegee ; Strawberry Valley, San Jacinto Mts., Condit; Bluff Lake, 



