344 GENUS ATRIPLEX. 



Nelson 8653 (Gr, NY, US) and 8675 (UC) ; type locality, along border of an alkaline draw 

 just west of Laramie, Johnston 2331 (UC). 



47c. Atriplex canescens garretti (Rydberg). — Shrub about 3 dm. high; leaves 

 broadly elliptic, widest across the middle, acute or slightly rounded at apex, 1 to 3.5 cm. 

 long, 0.8 to 1.8 cm. wide; fruiting bracts 6 to 12 mm. long, sessile or subsessile; wings 2 to 

 3 mm. wide, usually but not always exceeded by the free terminal portion of the bracts. 

 {A. garretti Rydberg, Bull. Torr. Club 39:312, 1912.) Eastern Utah and western Colo- 

 rado. Tjrpe locality, vicinity of Moab, Utah. Collections: Type collection, 1,200 to 

 1,500 m. altitude, Rydberg and Garrett 8465 (NY); above Palisade, Colorado, Crandall 

 112 (Gr). 



Aid. Atriplex canescens linearis (Watson). — Shrub 4 to 20 or 25 dm. high; leaves 

 nearly linear, tending to widest above the middle, acute or obtuse at apex, 1 to 3 or rarely 

 5 cm. long, 0.1 to 0.25 cm. wide; fruiting bracts 4 to 8 mm. long, on short stalks less than 

 2 mm. long, or sessile; wings 1 to 4 mm. wide, usually exceeded by the lanceolate free 

 terminal portion of the bracts but this feature variable. {A. linearis Watson, Proc. Am. 

 Acad. 24:72, 1889.) Arizona to Sonora, Lower California, and the Colorado Desert of 

 Alta California. Type locality, alkaline soil about Guaymas, Sonora. Collections: 

 Phoenix, Arizona, Griffiths 5895, 6179, 6181 (US); Tempe, Arizona, Kearney 118, 133 

 (US); Maricopa, Arizona, September 3, 1901, Thornber (NY, US); 6 km. northwest of 

 Tucson, Arizona, Thornber 110 (DS, UC); Guaymas, Sonora, Palmer 120, 121, 235 (Gr, 

 NY, US, all cited with the original description, only 235 in mature fruit at the Gray 

 Herbarium); Las Animas Bay, Lower California, Johnston 3490 (SF, UC); La Paz, 

 Lower California, Johnston 3041 (SF, UC) ; Agua de San Esteban, north of San Ignacio, 

 Lower California, Nelson and Goldman 7207 (US); Durmid, Salton Sea, California, 

 Parish 8073 (DS, Gr). See further under minor variations 1 and 17. 



47e. Atriplex canescens macropoda (Rose and Standley). — Shrub, the size not 

 known; leaves nearly linear, tending to widest above the middle, obtuse at apex, 1 to 2 

 cm. long, 0.1 to 0.15 cm. wide; fruiting bracts (including wings) 6 to 10 mm. long, on slen- 

 der stalks 4 to 10 mm. long; wings 2 to 4 mm. wide, much exceeded by the oblong to tri- 

 angular free portion of the bracts. (A. macropoda Rose and Standley, N. Am. Fl. 21: 

 72, 1916.) Known only from the type collection, Pinchilinque Island, Gulf of California, 

 Rose 16618 {'!<iY,VS). 



MINOR VARIATIONS AND SYNONYMS. 



1. Atriplex angustior Cockerell, Proc. Davenport Acad. 9: 7, 1902. — Based upon Obione occidentalis 

 angustifolia, which see in this list. In New Mexico the angustior form produces flowers and fruits a month 

 or six weeks earher than typica, according to Wooton and Standley (Contr. U. S. Nat. Herb. 19: 204, 1915). 



2. A. APTERA Nelson, Bot. Gaz. 34: 356, 1902. — A. canescens aptera. 



3. A.? BERLANDiERi Moquin, Chenop. Enum. 65, 1840. — From the description this appears to be 'A. 

 canescens typica with undeveloped fruiting bracts. It is reduced to this species by most writers on the genus. 

 The type came from Mexico. 



4. A. CANESCENS var. angustifolia Watson, Proc. Am. Acad. 9: 121, 187i.— Based upon Obione occidentalis 

 angustifolia, which see. 



5. A. CANESCENS var. laciniata Parish in Jepson, Fl. Calif. 442, 1914. — A form of A. canescens typica in 

 which the wings of the fruiting bracts are 6 to 8 mm. broad, thin, and saliently laciniate. Variation in the 

 wings from entire through deeply toothed to cut into narrow lobes has been noted by Torrey (Bot. Mex. Bound. 

 184, 1859, under Obione occidentalis). A form with similarly laciniate, but narrow and thick wings, has been 

 described as A. odontoptera Rydberg (No. 11 of this list). Such variations are too numerous to render feasible 

 their taxonomic recognition when the species as a whole is taken into account. Type locality, Caleb, Colorado 

 Desert, California. Collections: type collection, Parish 8256 (Gr); Dos Palmas, in the same district, January 

 21, 1921, Childs (UC); near Newberry, Mojave Desert, 1907, Morefort (Pomona). 



6. A. CANESCENS var. macilenta Jepson, Fl. Calif. 442, 1914.— As to fruiting bracts, this is the opposite 

 extreme from variety laciniata, the wings being much reduced, 1.5 to 3 mm. broad, and only dentate. Accord- 

 ing to Jepson, macilenta is not uncommon in the southern part of the Colorado Desert and has an aspect very 

 different from typical canescens. Type locality, Holtville, California. Not seen. 



