1923] Ottley: A Bevision of the Calif ornian Species of Lotus 221 



Contrib. U.S. Nat. Herb., vol. 11, 1906, p. 366, Lotus sericeus Pursh, 

 Fl., vol. 2, 1814, p. 489, type loc. on the banks of the Missouri. Acmi- 

 spon sericeus Raf., Atl. Jour., vol. 1, 1832, p. 144. Acmispon sericeum 

 Raf., New Fl., part 1, 1836, p. 53, Hosackia sericea Trelease ex Bran- 

 ner and Coville in Am. Rep. Geol. Surv. Ark., vol. 4, 1888, p. 174. 

 Hosackia purshiana Benth in Lindl. Bot. Reg., vol. 15, 1829, under 

 t, 1257, type from northwest coast of North America, Douglas. Lotus 

 purshianus Clements and Clements, Rocky Mt. FL, 1914, p. 183, 

 Hosackia imifoliolata Hook., Fl. Bor. Am., vol. 1, 1833, p. 135, type loc, 

 shores of the Columbia River, Scolder. Lotus(f) unifoliolatus Benth., 

 Trans, Linn, Soc, vol, 17, 1837, p, 368, Hosackia elata Nutt, in T. and 

 G., Fl. N. A., vol. 1, 1838, p. 327. Hosackia floribunda Nutt., loc. cit., 

 type loc, plains of the Rocky Mountain Range, towards the Oregon. 

 Hosackia mollis Nutt., loc. cit., type loc. gravel bars and sandy 

 shores of the Wahlamet near the Falls. Acmispon mollis Heller, 

 Muhl, vol. 9, 1913, p. 62. Acmispon gracilis Heller, Muhl, vol. 9, 

 1913, p. 61, type loc. near Burke's Sanitarium, Sonoma County, 

 Heller 5745. Acmispon spnrsiforns Heller, loc. cit., p. 63, type loc, 

 Russian River, Mendocino County, Heller 5834. Acmispon aestivalis 

 Heller, loc. cit., type loc, Santa Rosa, Sonoma County, Heller 6051. 

 Var. MINUTIFLORUS Ottley. Hosackia elata var. glabra Nutt.. loc. cit., 

 type loc, gravelly bars of the \Yalilamet and Oregon. Acmispon 

 glahratus Heller, loc. cit. type loc, lower end of Donner Lake, Heller 

 7019. Hosackia jnlosa Nutt., loc cit. Acmispon pilosits Heller, loc. 

 cit., p. 64. 



16. L, denticulatus Greene (pi. 74, figs. 8-14). Erect annuals, 

 2 to 5 dm, high, with few long coarse branches ; stems glabrous or 

 sparingly covered with short appressed hairs ; leaves and calyces 

 pilose, the hairs longer and softer than in L. suhpinnatus Lag. ; leaves 

 1.5 to 3 cm. long ; leaflets 3 or 4, narrowly obovate, margins usually 

 denticulate ; rachis flat, bearing two leaflets at its apex and one or two 

 on one side ; flowers solitary, almost sessile, 6 to 8 mm. long, whitish- 

 cream with back of banner tinged with purple; calyx teeth subequal 

 or the two dorsal ones narrowly triangular and the others nearly 

 linear, as long as or longer than the tube, margins often denticulate; 

 banner short-clawed, blade nearly orbicular ; keel attenuately beaked, 

 with upper margin covered by the wings; wings of this and of L. 

 suhpinnatus Lag. and of L. humistratus Greene furnished with a 

 deeper, more nearly triangular lobe or process than any other Cali- 

 f ornian species of Lotus; ovary straight on one margin, rounded on 

 the other, covered with silky hairs ; style hooked at base ; legumes 1 to 

 2 cm. long, 3 to 4 mm. wide, covered with short soft appressed hairs, 

 sutures thickened and often denticulate, 2 to 4-seeded ; seeds 4 by 

 2 mm. to 2 by 1 mm., asymmetric, notched at the hilum, with an 

 elevation on one or both sides. 



Northern part of California north to British Columbia. Dis- 

 tribution Map 6. May-August. According to Greene, this species 

 "embraces all of Hosackia subpinnata of Mr, Macoun's Catalogue," 



Localities. — Oregon: Ash Creek, Rogue River Valle^^ Austin, July, 

 1893. California: near Egg Lake, Modoc County, Baker and Nutting, 

 June 8, 1894 ; near Pitt River, Modoc County, M. S. Baker, July 28, 



