322 LEGUMINOSAE 



Smith; Coyote, Santa Clara Co., Jepson 6203; Los Gatos, Heller 7526; Jolon, Monterey Co., 

 Brewer 559; Paso Roblcs, Barber. Great Valley: Anderson, Shasta Co., BlankinsJiip ; Cliico, H. 

 A. Button : Stockton, Sanford; Alamo Creek, Vaca Valley, Jepson 13,775. Sierra Nevada: 

 Auburn, ShoeUey; Five-mile Creek, South Pork Stanislaus River, A. L. Grant 732; Grccly Hill, 

 Mariposa Co., Jepson 13,779; Hetch-IIetchy, Jepson 3409; Toll House, Fresno Co.; Kaweah, 

 Hopping 2S1; Middle Tule Kiver, Burpus 5023. Mohave Desert: Daggett (Camp Cady), Cooper. 

 S. Cal.: Ojai Valley, Olive Thaeher 20; Ciencga, Los Angeles, Braunton 620; Claremont, Chand- 

 ler; Cajon Canon, N. C. Wilson; San Bernardino Valley, Barish ; Hemet Valley, Mum 5968; 

 Mesa Grande, San Diego Co., E. Ferguson 101; Witch Creek, San Diego Co., Alderson. 



Var. glaber Ewan comb. n. Decumbent, less robust than the species, pilose to nearly glabrous ; 

 peduncles longer or shorter than the leaves; flowers 2 to 2^2 lines long. — Higher altitudes (4500 

 to 6500 feet), except along the coast; a reduced form. 



Locs. — Coast Ranges: Crescent City, Bavy 5945b; Eureka, Tracy 3536; Fort Bragg, Ottley 

 1552; Mt. Konocti, Lake Co., Jepson 13,780. Sierra Nevada: Martin Sprs., Eagle Lake., Brown 

 4- Wieslander 89 ; Bear Valley, Nevada Co., Jepson 13,781 ; Tallac, Eldorado Co., Ottley 1200 ; 

 Kennedy Mdw., Tuolumne Co., A. L. Grant 893; Mono Mdws., Mono Creek, South Fork San 

 Joaquin River, E. Ferguson 414; Lower Hot Sprs., South Fork San Joaquin River, Jepson 13,226; 

 Jackass Mdw., South Fork San Joaquin River, Mainwaring 511; Markwood Mdw., Fresno Co., 

 Jepson 16,037; Simpson Mdw., Middle Fork Kings River, Henrietta Eliot; Kings Canon, Ottley 

 1485. 



Refs. — Lotus americanus Bisch. Del. Sem. Hort. Heidelb. (1839) ; Jepson, Fl. W. Mid. Cal. 

 302 (1901), ed. 2, 231 (1911), Man. 553 (1925). Trigonella americana Nutt. Gen. 2:120 (1818), 

 a new name for Lotus sericeus Pursh. HosacTcia americana Piper, Contrib. U. S. Nat. Herb. 

 11:366 (1906). L. sericeus Pursh, Fl. 489 (1814), type loc. "banks of the Missouri"; not Lotus 

 sericeus Moench (1802). ^cniispon senceum Raf. Atl. Jour. 1:145 (1832), HosacTcia purshiana 

 Benth. ; Lindl. Bot. Reg. sub t. 1257 (1829), a new name for Lotus sericeus Pursh. L. purshianus 

 Clements & Clements, Rocky Mtn. Fls. 183 (1914). HosacTcia unifoUata Hook. Fl. Bor. Am. 1:135 

 (1830), type loc. shores of the Columbia River, Scolder. Lotus? unifoliatus Benth. Trans. Linn. 

 Soc. 17:368 (1837). HosacTcia elata Nutt.; T. & G. Fl. 1:327 (1838), type loc. "gravelly bars of 

 the Wahlamet and Oregon", Nuttall. HosacTcia floribunda Nutt. I.e., type loc. "plains of Rocky 

 Mt. range toward the Oregon," Nuttall (flowers numerous, almost sessile, ex char.). H. mollis 

 Nutt. I.e., type loc. "Wahlamet near the Falls", Nuttall (hirsute with spreading hairs ; peduncles 

 exceeding leaves, ex char.). Acmispon mollis Hel. Muhl. 9:02 (1913). A. gracilis Hel. I.e. 61, 

 type loc. near Burke's Sanatorium, Sonoma Co., Heller 5745 (plant glabrous or nearly so; pe- 

 duncles exceeding leaves). A. sparsiflorus Hel. I.e. 63, type loc. Russian River near Cloverdale, 

 Heller 5834 (plant erect, few-flowered; peduncles shorter than leaves flowers 3^^ lines long). A. 

 aestivalis Hel. I.e., type loc. Santa Rosa, Sonoma Co., Heller 6051 (plant decumbent, many- 

 flowered; peduncles shorter than leaves; flowers SVo lines long; late flowering). Var. glaber 

 Ewan. HosacTcia elata var. glabra Nutt.; T. & G. Fl. 1:327 (1838), type loc. "gravelly bars of 

 the Wahlamet and Oregon", Nuttall. Acmispon glabratus Hel. Muhl. 9:65 (1913), type loc. 

 Donner Lake, Heller 7019 (plant glabrous; flowers few; leaves 6 to 7i/^ lines wide). HosacTcia 

 pilosa Nutt. I.e., type loc. "gravelly bars of the Wahlamet and Oregon", Nuttall (densely clothed 

 with, soft hairs, ex char.). Acmispon pilosus Hel. I.e. 64. L. americanus var. minutiflorus Ottley, 

 Univ. Cal. Publ. Bot. 10:220 (1923) ; Jepson. Man. 553 (1925). 



17. L. denticulatus Greene. North Lotus. River-bar Lotus. Stem erect, 

 branching at the base or above the middle, 1 to 2 feet high; branches few and coai*se; 

 herbage pale green, mainly glabrous or scantily villous, especially on the leaves or 

 younger parts; leaves 5 to 13 lines long; leaflets 4, elliptic-obovate, 4 to 10 lines 

 long; flowers solitary in the axils, 2 to 3 lines long, on pedicels l^ to % line long; 

 calyces villous, calyx-teeth subulate, longer than the tube, sometimes denticulate, 

 as sometimes also the margins of the leaflets; corolla whitish, or pink- or lilac- 

 tinged; keel beaked, yellowish; pods tan-color, flattish, 4 to 10 lines long, IV2 to 

 2 lines wide. 



Open hill slopes or gravelly stream beds, 2500 to 4000 feet : northern Sierra 

 Nevada from Butte Co. to Modoc Co. ; North Coast Ranges from Lake Co. to Sis- 

 kiyou Co. North to British Columbia. May-June. 



Locs. — Northern Sierra Nevada: Chico, Heller 11,342; Fort Bidwell, Manning 463; Egg 

 Lake, w. Modoc Co., BaTcer 4" Nutting. North Coast Ranges: Witter Sprs., n. Lake Co., Eliza- 

 beth Taylor; Mail Ridge, s. Humboldt Co., Jepson 1882; Hydesville, Humboldt Co., Tracy 1240; 

 Kneeland Prairie, Humboldt Co., Tracy 3845 ; Yreka, Butler 389, 912. 



Refs.— Lotus denticulatus Greene, Pitt. 2:139 (1890); Jepson, Man, 552 (1925). Ho- 

 sacTcia denticulata Drew, Bull. Torr. Club 16:151 (1889), type loc. along Mad River near Jami- 

 gan's, Humboldt Co., Chesnut 4" Drew. Anisolotus denticulatus Hel. Muhl. 7:139 (1912). 



