EVENING PRIMROSE FAMILY 571 



Humboldt Co. ; Great Valley; Sierra Nevada from Tulare Co. to Modoc Co. North 

 to British Columbia, east to Colorado and Arizona. June-Sept. 



Locs. — S. Cal.: San Jacinto Mts., Eall 2627 ; San Antonio Canon, San Antonio Mts., Peirson 

 126; Bear Valley, San Bernardino Mts., Mum 10,735. Coast Ranges: San Luis Obispo, Condit; 

 Mt. San Carlos, Brewer 789; Los Buellis Hills, Mt. Hamilton Range, B. J. Smith; Stanford, C. F. 

 Baker 46; Berkeley, E. A. Walker 435; Kenwood, Sonoma Co., If. S. Baker 5565; Ukiah, Men- 

 docino Co., Purely; Bull Creek, Humboldt Co., Jepson 16,538; Dinsmore ranch. Van Duzen River 

 valley, Humboldt Co., Tracy 3959. Great Valley: Tulare, Davy 3023; Latlirop, E. A. Walker 

 921; Brannan Isl., Sacramento Co., Jepson 10,223; Princeton, Colusa Co., Chandler. Sierra Ne- 

 vada: Giant Forest, Tulare Co., K. Brandegee; Mono Mdw., near Mono Hot Sprs., Fresno Co., 

 A. L. Grant 1507; betw. Vernal and Nevada Falls, Yosemite, Ahrams 4597; lone, Amador Co., 

 Braunton 1216; Truckee, Sonne 3; Dry Creek, Butte Co., Eeller 11,689; Doyle, Honey Lake 

 Valley, Lassen Co., Davy; Ft. Bidwell, Modoc Co., Jepson 7912; Egg Lake, Modoc Co., M. S. 

 Baker; Goosenest foothills, Siskiyou Co., Butler 1629. 



Var. jucundum Trel. Herbage often very glaucous; flowers large, the petals 5 to 8 lines 

 long. — Open flats or grassy slopes, 10 to 4400 feet : Coast Ranges from Santa Clara Co. to Hum- 

 boldt Co. ; east to Plumas and Sierra Cos. North to Washington. Aug.-Sept. 



Locs. — Gilroy, Condit; Suisun, Eeller 7551 ; Grouse Mt., Humboldt Co., Tracy 4854; Trinity 

 River valley near the South Fork, Humboldt Co., Tracy 7273; Etna, Siskiyou Co., Butler 156; 

 Big Mdws., Plumas Co., Cleveland; Sierra Co. (Rep. Mo. Bot. Gard. 2:86). 



Refs. — Epilobium paniculatum Nutt.; T. & G. Fl. 1:490 (1890), type loc. "plains of the 

 Oregon and Rocky Mountains," Nuttall; Jepson, Man. 671, fig. 657 (1925). E. paniculatum f. 

 adenocaulon Hausskn. Monog. Epilob. 247 (1884), type from Cal., Bolander. Var. jucundum 

 Trel. Rep. Mo. Bot. Gard. 2:85, pi. 9 (1891) ; Jepson, Man. 671 (1925). E. jucundum Gray, 

 Proc. Am. Acad. 12:57 (1877), type loc. Scott Valley, Siskiyou Co., Greene. E. paniculatum f. 

 tubulosum Hausskn. Monog. Epilob. 247 (1884), type loc. Vallejo, Greene. 



5. BOISDUVALIA Spach 



Erect annuals with alternate sessile leaves. Flowers small or minute, in leafy 

 spikes or axillary along the branches. Calyx-tube short, obconic, its lobes 4, erect. 

 Petals 4, obovate, sessile, 2-lobed, purple to white. Stamens 8, those opposite the 

 petals shorter; anthers basifixed. Capsule 4-celled, 4-valved, sessile. — Species 

 about 8, western North and South America. (Jean Alphonse Boisduval, French 

 naturalist and physician, author of Flore Francaise.) 



Bibliog. — Watson, S., Revision of the extra-tropical species of the genus Oenothera, sect. 

 Boisduvalia (Proc. Am. Acad. 8:600-601, — 1873). Trelease, W., Revision of the N. Am. species 

 of * * * Boisduvalia (Rep. Mo. Bot. Gard. 5:116-122, pis. 23-26,-1894). Leveille, H., Mono- 

 graphic du genre Onothera: groupe Boisduvalia, 296-339 (1908). 



Capsule terete, membranous. 



Capsule septifragal, the septa wholly persistent on the placental axis, which is thus 4-winged.. 



1. B. den si flora. 

 Capsule loculicidal, the septa adherent to the valves in dehiscence. 

 Floral leaves ovate or oblong. 



Petals 2 lines long 2. B. glabella. 



Petals 4 to 6 lines long 3. B. macrantha. 



Floral leaves linear 4. B. stricta. 



Capsule 4-sided, coriaceous; dehiscence unknown 5. B. cleistogama. 



1. B. densiflora Wats. Stem erect, 1 to 5 feet high, branched above; leaf- 

 blades lanceolate, 1 to 2Y2 (or ^^2) inches long, the floral ovate, acute, about 3 to 

 6 lines long; inflorescence spicate, commonly elongated; petals about 2 lines long, 

 about twice as long as the sepals, and exceeding the subtending leaves; capsule 2 

 lines long, dehiscent; seeds ovate or triangular-ovate. 



Low ground or pool beds where water formerly stood in spring or winter, 10 to 

 6000 feet : Southern California mountains; Sierra Nevada from Kern Co. to Modoc 

 Co.; Great Valley; Coast Ranges from San Luis Obispo Co. to Siskiyou Co. North 

 to British Columbia, east to Wj^oming, south to Lower California. June-Sept. 



Locs. — S. Cal.: Palomar Mt., Esther Eewlett ; Little Bear Valley, San Bernardino Mts., 

 Chandler; Frazier Mt., Ventura Co., Eall 6617. Sierra Nevada foothills: Piute Peak, Kern Co., 

 Purpus 5294; Three Rivers, Tulare Co., K. Brandegee; Pine Ridge, Fresno Co., K. Brandegee; 

 Greeley Hill, Coulterville, Jepson 14,397; Jones sta., Tuolumne Co., A. L. Grant 875; Kentucky 

 House, South Fork Calaveras River, Jepson 10,036; Auburn, Shockley ; Bear Valley, Nevada Co., 



