368 BOKAGINACEAE 



19. A. austinae Greene. Stems 1 or few from the base, erect or ascending, 4 

 to 10 inclies high ; herbage almost glabrous ; leaf -blades linear, i/^ to 3 inches long ; 

 flowers becoming remote in loose racemes, the racemes li'o to 7^2 inches long; 

 calyces tawny-hirsute; corolla 1% to 2 lines wide; nutlets with quadratish body 

 and abruptly acute apex, the apex strongly obcompressed and rather longer than 

 the body; surface of nutlets short-rugulose and tuberculate ; dorsal keel thin and 

 high, this and the lateral angles armed throughout or partially with 4 or 5 stout 

 spines or processes ; ventral keel or its bordering rugae partially spiny or destitute 

 of spines ; spines barbed above the middle or throughout. 



Red gravelly clay of depressions on plains and in low hills, 100 to 1500 feet : 

 Sierra Nevada foothills and east side of the Great Valley plain from Shasta Co. to 

 Stanislaus Co. Mar.-May. 



Loca. — Redding (5 mi. e.). Hoover 2267; Butte Co., foothills, H. F. Copeland 1113; Marys- 

 ville Buttes (Contrib. TJ. S. Nat. Herb. 22:89) ; Stony Creek, Amador Co. (Contrib. U. S. Nat. 

 Herb 22:89) ; Goose Creek (hills about headwaters), ne. San Joaquin Co., Jepson 18,082; Farm- 

 ington, San Joaquin Co., Hoover 345; Eugene, Stanislaus Co., Jepson 18,025; Knights Ferry (3 

 mi. s.), Stanislaus Co., Jepson 18,093 (prickles of nutlets absent except from upper part of dorsal 

 keel) ; near La Grange, Stanislaus Co., Hoover 968 (nutlets as in the preceding). 



Near La Grange, Stanislaus Co., occurs a form (var. nuda Hoover) with the nutlets destitute 

 of prickles. This remarkable and instructive form could not so well have been evaluated properly 

 save for the fortune of instituting comparisons with a collection from the same locality (Hoover 

 968) representing the species, but which is in some respects intermediate between the species and 

 the variety. 



Eefs. — Allocakya austinae Greene, Pitt. 1:18 (18S7), type Ice. Butte Co., R. M. Austin; 

 Jepson, Man. 853 (1925). Echinoglochin austinae BTand; Fedde, Repert. Sp. Nov. 21 :253 (1925). 

 Plagiohothrys austinae Jtn., Contrib. Arn. Arb. 3:36 (1932). A. cristata Piper, Contrib. U. S. 

 Nat. Herb. 22:89 (1920), type loc. Mokelumne Hill, Calaveras Co., Blaisdell. Eehinogloehin 

 cristata Brand, I.e. A. austinae var. cristata Jepson, Man. 853 (1925). Var. ndda Hoover, Lfits. 

 W. Bot. 1:228 (1936), type loc. La Grange-Snelling road. Hoover 967. 



20. A. greenei Greene. Stems few from the base, erect to diffuse, 5 to 15 

 inches high; herbage strigulose or somewhat spreading-hispid; leaf -blades linear 

 or oblaneeolate, obtuse, % to 2 inches long; racemes loose, bractless or bracteate at 

 base, 1 to 4^/2 inches long; nutlets broadly ovate, 1 line long, armed with slender 

 barbed prickles arising from a densely whitish-papillate ground; keel of dorsal side 

 (sometimes obscure) set with prickles, the keel of ventral side thin, high, smooth, 

 ending below the middle in a bordered pit or hollow ; prickles i/4 to ^/^ line long, 

 barbed nearlj^ to base, quite distinct at base. 



Grassy clay hills, gravelly flats or adobe plains, 50 to 2600 feet : Sierra Nevada 

 foothills from Stanislaus Co. to Shasta Co. ; Sacramento Valley; middle and inner 

 North Coast Ranges from Sonoma Co. to western Siskiyou Co. North to southern 

 Oregon. Mar.-June. 



Loes. — Sierra Nevada foothills: La Grange, Stanislaus Co., Hoover 3418; Willow Springs 

 sta., Amador Co., Jepson 15,242 ; Folsom, e. Sacramento Co., Jepson 15,744 ; near Table Mt., n. 

 of Oroville, Heller 11,266. Sacramento Valley: Vanden, cent. Solano Co., Jepson 19,905 ; Peaceful 

 Glen, nw. Solano Co., Jepson 9611 ; Bio Linda, n. Sacramento Co., Jepson 16,588 ; Biggs, Butte 

 Co., H. F. Copeland; Red Bluff, Jepson 21,174 (exclusively occupying many acres in dry fields). 

 North Coast Ranges: Bennet Valley, Sonoma Co., M. S. Baker 2131a ; Yreka, Butler 668. 



Var. hystricula (Piper) Jepson. Dorsal side of nutlets thickly prickly, the prickles very 

 short (% to % line long), crowded in rows or sometimes in interrupted rows and forming com- 

 plete or imperfect areolae ; ventral side of nutlets not prickly, rugulose-tuberculate.— Plains and 

 hills of Solano Co.: Elmira, K. Brandegee ; Montezuma Hills, Jepson 21,176. 



Refs. — Allocarya greenei Greene, Man. Reg. S. F. Bay 259 (1894) ; Jepson, Fl. W. Mid. 

 Cal. 443 (1901), ed. 2, 346 (1911), Man. 853 (1925). Echinospermum greenei Gray, Proc. Am. 

 Acad. 12:163 (1877), type loc. Yreka, Siskiyou Co., Greene. Allocarya eehinogloehin Greene, Pitt. 

 1:15 (1887). Plagiohothrys greenei Jtn., Contrib. Gray Herb. 68:76 (1923). Eehinogloehin 

 greenei Brand; Fedde, Repert. Sp. Nov. 21: 253 (1925). Var. hystricula Jepson, Man. 853 

 (1925). A. hystricula Piper, Contrib. U. S. Nat. Herb. 22 :87 (1920), type loc. Montezuma Hills, 

 Solano Co., Jepson 21,176 (isotyp. in Herbario Jepsoniano). Eehinogloehin hystricula Brand, 

 I.e. Plagiohothrys hystrieulus Jtn., Contrib. Arn. Arb. 3:32 (1932). 



