1923] Ottley: A Revision of the Calif ornian Species of Lotus 219 



veined with rose, wings but faintly veined, the acute keel tipped with 

 yellow and projecting beyond the wings; legumes linear, 2 to 3.5 cm. 

 long, glabrous, 3 to 7-seeded ; seeds oblong. 



Pacific Coast states east into central United States. Distribution 

 Map 5. May-October. A very variable polymorphic species of wide 

 distribution. L. americanus has been divided into several different 

 species, notably by Heller, on the basis of variation in pubescence, 

 number and size of flowers, length of peduncles, and habit. After a 

 careful study of the various forms in the field and of duplicates of 

 Heller 's types we conclude that the group is essentially a unit. With 

 the exception of Heller's Acmispon glabratus with its relatively short 

 and broad calyx teeth, no qualitative distinction, except that of habit, 

 has been found on which to separate the group into the different 

 divisions. 



Localities. — Hornbrook, Siskiyou County, Copeland 3495 ; Yreka, 

 Heller, 8001; near Dietz Station, 3800 ft. alt., Heller, 11701, 

 '' Acmispon gracilis"; Sisson, Jepson, July-August, 1894; Scott 

 River Valley, Gilbert in 1899 ; near Black Butte, Siskiyou County, 

 Heller 12430, "Acmispon silvicola" (leaves mostly reduced to one 

 leaflet); Hupa Indian Reservation, Chandler 1394; Redwood Creek 

 at crossing of Willow Creek road, Humboldt County, Tracy 4386; 

 valley of Van Duzen River, opposite Buck Mountain, Tracy 3964, 

 3973 ; Hyampon, Price, July 5, 1890 ; Rush Creek Anclerlines, 

 Trinity County, Yates 429; South Fork of Eel River, Mendocino 

 County, Tracy 5067, "villous form" and 5068, "The common form 

 here" (pubescence inconspicuous) ; near Ukiah, Purely; near Walker's 

 Ranch, Mendocino County, Davy and Blasdale 1021 ; near Comptche, 

 Walker 315 ; banks of Russian River, north of Cloverdale, Mendocino 

 County, Heller 5834 ; Santa Rosa, Sonoma County, Heller 6051 ; near 

 Burke's Sanitarium, Sonoma County, Heller 5754; Sulphur Banks, 

 Lake County, Bowman; Uncle Sam Mountain, Lake County, Jepson; 

 Vacaville, Jepson, September, 1891 ; Alamo Creek, Solano County, 

 Jepson, September, 1891 ; Moraga Ridge, Ottley 778 ; Alameda, Park, 

 September 1, 1866 ; Alameda, Kellogg, September 1, 1866 ; Fruitvale 

 near Diamond Caiion, Walker 686 ; Stockton, Sanford 70 ; foothills west 

 of Los Gatos, Santa Clara County, Heller 7526 ; foothills near Stan- 

 ford University, C. Baker 872, 1511 ; Jolon Ranch, Monterey County, 

 Brewer 559 ; Paso Robles, Barber, April 23, 1899 ; sand hills near the 

 sea, San Luis Obispo Countj^ Summers; The Sisquoc, Santa Barbara 

 Countv, M. S. Baker, Julv, 1895 ; Topango, Los Angeles County, Barber 

 August 3, 1898; Elysian Hills, Braunton 396; Pasadena, Ottley 598; 

 Aliso Caiion, Los Angeles County, Barber 199 ; Los Angeles, Geo. B. 

 Grant, May 18, 1902 ; Cienega, Braunton 626 ; Cuyamaca, T. S. 

 Brandegee, July 6, 1894 ; Witch Creek, San Diego County, Alderson, 

 May, 1894; Ramona, K. Brandegee, October, 1903; Boulevard, Laguna 

 Mountains, Imperial County, McGregor 89 ; San Jacinto Mountain, 

 Anthony, July 15, 1895; Strawberry Valley, San Jacinto Mountains, 

 Hall 2387; Bear Valley, San Bernardino Mountains, Chandler, July 

 29, 1897; Waterman Canon, San Bernardino County, Parish 2286; 

 vicinity of Riverside, Hall 154; Claremont, Chandler, June 21, 1897; 

 Owen's Valley and at Fort Tejon, Horn in 1862-64 ; Cajon Caiion. N. C. 

 Wilson, June 25, 1893 ; Middle Tule River, Purpus 5623 ; Toll House, 



