EVENING PRIMROSE FAMILY 607 



San Bernardino Mts. (Am. Jour. Bot. 19:774); Tehachapi Mts., Lake Tahoe and Mt. Shasta 

 (Am. Jour. Bot. 19:774). This variety has no geographic significance but the difference in 

 pubescence is quite striking. 



Var. eriospermum Jepson. Petals 1^ to 2 lines long. — Montane, essentially same range as 

 the species. 



Eefs. — Gayophytum lasiospermum Greene, Pitt. 2:164 (1891), type loe. near Julian, San 

 Diego Co., G. W. Dunn; Trel. Rep. Mo. Bot. Gard. 5:109, pi. 17 (1894) ; Jepson, PI. W. Mid. Cal. 

 ed. 2, 284 (1911), Man. 689 (1925). Oenothera gayophytum race treleasiana f. lasiospermum 

 Levi. Monog. Onoth. 169 (1904). Var. hoffmannii Munz, Am. Jour. Bot. 19:774 (1932), type 

 loe. Stauffer, Mt. Pinos, Ventura Co., Hoffmann. G. helleri var. glabrum, Munz, Am. Jour. Bot. 

 19:777 (1932), type loe. Silver City, Owyhee Co., Ida., Macbride 398. Var. eriospermum Jepson, 

 Man. 689 (1925). G. eriospermum Cov. Contrib. U. S. Nat. Herb. 4:103 (1893), type loe. Big 

 Tree Canon, East Fork Kaweah Eiver, Tulare Co., Coville 1316; Trel. Eep. Mo. Bot. Gard. 5:109, 

 pi. 18 (1894) ; Jepson, PL W. Mid. Cal. ed. 2, 284 (1911). 



4. G. helleri Rydb. var. erosulatum Jepson. Steins diffusely branching from 

 the base, 6 to 8 inches high; herbage grayish, especially the leaves, with a some- 

 what dense cover of short spreading hairs, the young parts canescent; petals white, 

 turning deep red, elliptic, erosulate all around, i/4 to 1/3 line long; capsules 2^ to 

 3 lines long, contracted into a pedicel about half as long. 



Dry sandy slopes, 4000 to 9700 feet : east side of Sierra Nevada from Lassen 

 Co. to Modoc Co. July- Aug. 



Locs. — Beckwith Pass, Lassen Co. ; Mt. Bidwell, Warner Mts., Jepson 7889. 



Eefs. — Gayophytum helleri Eydb. Bull. Torr. Club 40:65 (1913), type loe. Forest, Lewis 

 Co., Ida., Heller 3433. Var. erosulatum Jepson, Man. 689 (1925), type loe. Beckwith Pass, 

 Lassen Co., Jepson 7754. 



5. G. caesium T. & G. Stem subsimple or diffusely branching, 6 to 9 inches 

 high; herbage soft-pubescent or glabrous; leaf -blades linear to narrow-oblance- 

 olate, ^/2 to % (or 11^) inches long; petals very small (I/3 to I/2 line long) ; stigma 

 globose, large; capsules pubescent, 5 to 6 lines long, the pedicel very short (I/2 to 

 1 line long). 



Dry ridges or meadows, 4000 to 9500 feet: San Bernardino Mts.; Mt. Pinos; 

 easterly summits or east side of the Sierra Nevada from Tulare Co. to Modoc Co. 

 June-Aug. 



Locs. — S. Cal. mts. : Pine Lake, Bear Valley, San Bernardino Mts., Abrams 2901 ; Bluff Lake, 

 San Bernardino Mts., Mum 10,618; Mt. Pinos, Ventura Co., Hall 6667. Sierra Nevada: Sand 

 Mdw., near Hockett Mdw., Tulare Co., Jepson 4683 ; betw. Tehipite Valley and Gnat Mdw., E. 

 Ferguson 534 ; Kaiser Mdw., near Kaiser Pass, Jepson 16,091 ; Bloody Canon, Mono Co., Chesnut 

 4" Brew ; Donohue Pass, near Mt. Lyell, Blasdale ; betw. Fallen Leaf and Cascade Lake, Eldorado 

 Co., M. S. Balcer ; Susanville, T. Brandegee; Forestdale, sw. Modoc Co., M. S. Balcer. White Mts.: 

 Black Canon, Coville 1797. 



Eefs.— Gayophytum caesium T. & G. PL 1:514 (1840), type loe. Walla Walla, Wash., 

 Nuttall; Trel. Eep. Mo. Bot. Gard. 5:113, pi. 21 (1894) ; Jepson, Man. 689 (1925). Oenothera 

 caesia Nutt. ; T. & G. I.e. as synonym. G. racemosum var. caesium, Munz, Am. Jour. Bot. 19:776 

 (1932). Oenothera gayophytum race phillippiana f. caesia Levi. Monog. Onoth. 169 (1904). 



6. G. humile Juss. Stems erect, simple or with commonly simple ascending 

 branches, 2 to 10 inches high, purplish; herbage glabrous; lower leaves sparse, the 

 blades 12 lines long, upper leaves numerous, crowded, usually rather strict, the 

 blades linear-lanceolate to oblanceolate, 6 to 10 lines long; flowers in the upper 

 axils; petals white, turning pink, about I/2 line long, not exceeding the calyx-lobes 

 or scarcely ; capsules strongly flattened contrary to the partition, markedly fur- 

 rowed on each side, glabrous, 4 to 5 lines long. 



Dry slopes, coniferous forests, 3000 to 9000 feet : Sierra Nevada from Tulare 

 Co. to Shasta Co. ; North Coast Ranges from Lake Co. to Humboldt Co. North to 

 Washington and Idaho; Chile. May- Aug. 



Locs. — Sierra Nevada: South Fork Middle Tule Eiver, Jepson 4875a; Alta Mdws., Tulare 

 Co., K. Brandegee ; Millwood (Sequoia Mills), T. Brandegee ; Huntington Lake, Fresno Co., 

 E. Ferguson 374; Calaveras Big Trees, A. L. Grant; Truckee, Nevada Co., Heller 7057; Dutch 



