A. BARCLAYANA. 315 



Key to the Subspecies of Atriplex bardayana. 



Bracts compressed (sometimes appearing thickened by the tubercles when these are present), 

 mostly as wide as long or wider except in magdalenae. 

 Leaves entire. 



Bracts dentate from summit to middle or lower. 



Length and width of bracts about equal (a) palmeri (p. 315). 



Length of bracts much exceeded by their width (6) dilatata (p. 315). 



Bracts 3-toothed at summit, sides entire (c) magdalenae (p. 315). 



Leaves saliently dentate (d) lurida (p. 315). 



Bracts much thickened, convex on the sides, mostly longer than wide. 



Bracts laciniate around summit and well down the sides, the margin foliaceous above, (e) sonorae (p. 316). 

 Bracts entire except at summit, where there are only a few small teeth, the margin not 



fohaceous (J) typica (p. 316). 



35a. Atriplex barclayana palmeri (Watson). — Leaves entire; fruiting bracts com- 

 pressed, sometimes appearing thickish when tubercled, cuneate-orbicular or cuneate- 

 obovate, about 3 mm. long, as wide or slightly wider; margins wing-like, coarsely lacini- 

 ate-dentate nearly to the base of the bract; faces smooth or tuberculate. {A. palmeri 

 Watson, Proc. Am. Acad. 1 1 : 146, 1876.) Islands off the west coast of Lower California; 

 also on islands in the Gulf of California. Type locality, Guadalupe Island. Collections: 

 San Luis Island, Johnston 3320 (SF, minor variation 3, A. insularis Rose); Santa Inez 

 Island, Johnston 3653 (SF, same variation); Raza Island, Palmer 155 (Gr, SF, US); 

 same locality, Palmer 158 and 159 (US, the former the tjrpe of A. insularis Rose, minor 

 variation 3); Raza Island, growing among rocks, facing the lagoon, Johnston 3210 (SF, 

 with ascending herbaceous branches, 5 dm. high, minor variation 3, A. insularis Rose, 

 but some bracts smooth) ; same spot, Johnston 3211 (SF, shrubby, 1 meter high, staminate 

 plant, a few mostly smooth bracts in the leaf-axils) ; Raza Island, on silty flat at southwest 

 end, Johnston 3214 (SF, nearly prostrate, stems woody, same variation in bracts as No. 

 3210); same but on south side, Johnston 3213 (SF, with loosely ascending stems 3 to 5 

 dm. high, same variation in bracts as No. 3210); San Benito Island, March 27, 1897, 

 Brandegee (UC) ; Magdalena Island, Orcutt 6 (US) ; type collection, 1875, Palmer 83 (Or) ; 

 Guadalupe Island, Palmer 862 (Gr, US) and 863 (Gr), also April 3, 1889 (UC); Guada- 

 lupe Island, April 24, 1885, Greene (UC, US) ; Guadalupe Island, March 20, 1897, Bran- 

 degee (UC, plants mainly staminate, but with a few bracts in the leaf-axils) ; Seal Island, 

 Rose 16818 (NY, US, minor variation 3, A. insularis Rose). 



356. Atriplex barclayana dilatata (Greene). — Leaves entire or slightly sinuate 

 or inclined to be dentate; fruiting bracts compressed, or somewhat thickened when 

 strongly tuberculate, wider than long, 3 to 6 mm. long, 5 to 8 mm. wide; margins wing- 

 like, thin, irregularly laciniate-dentate nearly to the base of the bracts; faces either 

 smooth or low-tuberculate or conspicuously crested (in minor variation 4, A. rosei 

 Standley). {A. dilatata Greene, Pittonia 1:264, 1889.) Guadalupe and San Benito 

 Islands, off the west coast of Lower California. Type locality, San Benito Island. 

 Collections: Guadalupe Island, Rose 16022 (US, type of A. rosei Standley, minor varia- 

 tion 4); San Benito Island, Pabiier 907 (US); San Benito Island, Anthony 269 (Gr, 

 DS, NY, UC, US); San Benito Island, Rose 16074 (NY, US). 



35c. A. BARCLAYANA MAGDALENAE (Brandegee). — Leaves entire; fruiting bracts mod- 

 erately compressed, cuneate-obovate, about 4 to 4.5 mm. long, 3.5 to 4 mm. wide; margins 

 developed only around the summit, there deltoid and tridentate; faces smooth. (A. 

 magdalenae Brandegee, Proc. Calif. Acad. II, 2:200, 1889.) Magdalena Island, off the 

 west coast of Lower California. Type locality, Magdalena Island. Collection: Type 

 collection, February 20, 1889, Brandegee (UC). 



35d. Atriplex barclayana lurida (Brandegee). — Leaves (rather thin) acutely 

 dentate with broad salient teeth or some only crenate, the upper mostly entire ; fruiting 

 bracts compressed, cuneate-orbicular, 2 to 3 mm. long, 2 to 4 mm. wide; margins wing- 



