336 GENUS ATRIPLEX. 



long, 1.5 to 5 cm. wide; flowers either dioecious or monoecious; mature bracts flattish 

 or convex, mostly 3.5 to 5 mm. in diameter or up to 7 mm. when borne in staminate 

 inflorescences, commonly thicker than in other forms, the margins usually entire or 

 only obscurely undulate. {A. breweri Watson, Proc. Am. Acad. 9:119, 1874.) Coast of 

 California from Suisun, San Francisco Bay, to Orange County. Tjrpe locality, Santa 

 Monica, Cahfornia. Collections, all from California: Railroad embankment near Teal, 

 Suisun Marshes, October 15, 1905, Dudley (DS); sandy creek bottoms south of Hollister, 

 San Benito County, October 15, 1919, Hall (UC); ocean bluffs, near Santa Barbara, 

 Eastwood 209 (NY, UC, US, monoecious in part, therefore minor variation 5, A. orbicu- 

 laris Watson); Santa Cruz Island, Francheschi (UC); river-bottoms, Santa Maria, 

 October 17, 1919, Hall (CI); Ventura, October 18, 1919, Hall (UC, most of the plants 

 monoecious, therefore minor variation 5, A. orbicularis Watson); type collection, "on 

 banks of seashore, Santa Monica," Brewer 75 (Or, UC, US); base of bluff's, seashore, 

 Santa Monica, Parish 1126 (Or, type of A. orbicularis Watson, minor variation 5); 

 Ballona, Los Angeles County, Braunton 710 (UC, US); Avalon, Santa Catalina Island, 

 only one plant seen, June, 1898, Trask (US); San Clemente Island, Trask 19 (US); 

 San Juan Capistrano, Orange County, June, 1896, McClatchie (UC). 



43c. Atriplex lentiformis torreyi (Watson). — Branches and twigs acutely angled 

 by prominent striae, becoming somewhat spiny as the leaves and bracts are lost; leaf- 

 blades mostly 1.5 to 3 cm. long, 0.5 to 2 cm. wide; flowers dioecious; mature bracts 

 flattish or somewhat convex, 2 to 4 mm. in diameter, the margins minutely crenulate. 

 (Obione torreyi Watson, Bot. King's Expl. 290, 1871.) Principally in Nevada, extend- 

 ing southwest to the Mojave Desert, California, and east into southwestern Utah. 

 Type locality, dry valleys bordering the Truckee and Carson Rivers, Nevada. Col- 

 lections, all from Nevada, except as otherwise indicated: Gerlach, northern Washoe 

 County, Hall 11792 (UC); Reese River Valley, Warren (DS); type collection, Humboldt 

 County, 1865, Torrey 463 (Gr, NY); Carson Desert, Watson 984 (Gr, NY); Truckee 

 Canon, below Vista, Hall 11230 (UC); Smoke Creek, Griffiths and Hunter 611 (NY); 

 Las Vegas, Hall 10801 (UC) ; alkaline plain near Dry Lake, Antelope Valley, California, 

 Davy 2945; Barstow, California, Jepson 5174 (DS); Lone Pine, California (according to 

 Jepson, Fl. Calif. 440, 1914); St. George, Utah, Jones 6094 (NY, UC). 



43d. Atriplex lentiformis griffithsi (Standley). — Branches and twigs acutely 

 angled by prominent striae, perhaps becoming spiny in age ; leaf-blades (as far as known) 

 1 to 2.5 cm. long, 0.3 to 1 cm. wide (elliptic-ovate to narrowly oblong); flowers dioecious; 

 mature bracts nearly flat but slightly convex, 4 to 6 mm. broad (4 to 5 mm. long, thus 

 broader than long), the margins minutely crenulate or some entire. {A. griffithsi 

 Standley, N. Am. Fl. 21:63, 1916.) Known only from the vicinity of the type locality, 

 Willcox, southeastern Arizona. Collections: Type collection, Griffiths 1895 (NY); 

 Willcox Flat, Arizona, Shreve 4239 (UC). 



MINOR VARIATIONS AND SYNONYMS. 



1. Atriplex breweri Watson, Proc. Am. Acad. 9: 119, 1874. — A. lentiformis breweri. 



2. A. GRIFFITHSI Standley, N. Am. Fl. 21: 63, 1916. — A. lentiformis griffithsi. 



3. A. LENTIFORMIS Watson, 1. c, 118, 1874. — Based upon Obione lentiformis, which see. 



4. A. LENTIFORMIS BREWERI (Watson). — A form with spatulate-orbicular entire to dentate leaves 1.5 to 3 

 cm. broad and bracts 9 to 10 mm. broad has been collected on the seacoast bluffs at Playa del Rey. Los Angeles 

 County, Cahfornia (Parish 11871, UC). With only an occasional exception, the ovaries fail to develop and 

 the whole appearance of the plant is that of a monstrosity. There is no evidence of injury due to insects. 

 Staminate plants from the same locality (Johnston 1900, UC) have similarly broad suborbicular leaves, some 

 of which are truncate at base, the remainder tapering to the petiole. The leaf-shape is approached in speci- 

 mens of subspecies typica from the Colorado River bottoms near Needles (March 3, 1910, Grinnell, UC). 

 According to Johnston, there is a considerable area at Playa del Rey where the peculiar form grows to the ex- 

 clusion of normal breweri. The latter, however, grows along near-by lagoons. 



