20 CONTRIBUTIONS TO WESTERN BOTANY. 



casional green tooth ; flattened, united almost to the tip. This is 

 also a very remarkable form apparently distinct, but shades into 

 the type in western Utah through forms with more green teeth 

 and many processes on the face, and by forms from Wyoming hi 

 the Green River Basin, with cuneate-oblong and shortly petioled 

 leaves and ovate bracts with simply acute tips and variable pro- 

 cesses. The type is my specimens from Dolly Varden Smelter, 

 E. Nevada, July, 1894. Allied forms are from Amedee, Cal., near 

 Honey Lake, and from Dutch Mt., W. Utah 



A. acanthocarpa var. ciiiieata(A Nelson Bot. Gaz. 34 357), A. 

 cuneata Nels. 1. c. 



A. corrugata Watson. 



This species was first discovered by the writer. The follow- 

 ing is a description taken from the field. Densely caespitose, form- 

 ing low and broad mats 1-4 feet in diameter, from which arise in- 

 numerable bent stems 1-6 inches long, terminating in very short 

 and leafy spikes ; fertile flowers about 3 lines long, 2 lines wide, 

 bracts with deltoid tips, barely acute, and with cuneate sides, en- 

 tire, free above, lower half densely covered with toothed pro- 

 cesses, the rest of the bract flat and smooth ; floral leaves oblong, 

 6 lines long, sessile, stem leaves oblong-lanceolate, 6 lines long, 

 1^-2 lines wide, plane, entire, obtuse, barely petioled, very many, 

 leathery; whole plant hoary, very common in the Navajo Basin. 

 Distantly related to A. confertifolia, but nearer to A. Nuttallii. Per- 

 haps its nearest relative is A. Greggii. 



A. phyllostegia (Torr.) Watson, A. Draconis Jones Cont. 8 

 40. Reported from Montana by Rydberg, but manifestly an error. 



A. tmncata var. saccaria (Watson Proc. Am. Acad. 9 112 

 ( 1874.) A saccaria Watson 1. c, 



A expansa var. Mohavensis. 



Fruiting bracts nearly reniform, more rigid, edges with many 



