WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 667 



24. PYRROCOMA Niitt. 



Perennial laerb with usually simple stems, alternate leaves, and large showy heads 

 of yellow flowers with bright yellow rays; bracts foliaceous, oblong, mostly obtuse, 

 numerous, appressed; achenes linear, 3-angled, striate, glabrous; pappus of slender 

 ta^vny bristles. 



1. Pyrrocoma crocea (A. Gray) Greene, Erythea 2: 69. 1894. 



Aplopappus croceus A. Gray, Proc. Acad. Phila. 1863: G5. 1864. 



Pyrrocoma ampledens Greene, Leaflets 2: 10. 1909. 



Type locality: Middle Park, Colorado. 



Range: Wyoming to Arizona and New Mexico. 



New Mexico: Chama; El Rito; Baldy ; Santa Fe and Las Vegas mountains; Mogollon 

 Mountains. Meadows in the mountains, in the Transition and Canadian zones. 



A common and very handsome plant in the open meadows of the liigher mountains. 

 When growing it suggests the more common Dugaldca hoopesii and is likely to be taken 

 for that by careless observers. The type of P. ampledens was collected on the Middle 

 Fork of the Gila by Metcalfe (no. 540). 



26. OREOCHRYSTJM Rydb. 



Nearly glabrous perennial herb, in aspect like the Solid agos, with numerous basal 

 leaves, a low leafy stem, and numerous rather large corymbose heads of yellow flowers; 

 involucre campanulate, the broad, foliaceous or chartaceous, oblong, obtuse bracts 

 in 2 or 3 unequal series; rays numerous, small, narrow, pale yellow; achenes short, 

 glabrous or nearly so. 



1. Oreochrysum parryi (A. Gray) Rydb. Bull. Torrey Club 33: 153. 1906. 



Aplopappus parryi A. Gray, Amer. Journ. Sci. II. 33: 239. 1862. 



Solidago parryi Greene, Erythea 2: 57. 1894. 



Type locality: Upper Clear Creek, Colorado. 



Range: Wyoming to Arizona and New Mexico. 



New Mexico: Tunitcha Mountains; Sandia Mountains; Jemez Mountains; Santa Fe 

 and Las Vegas mountains; Hillsboro Peak; Mogollon Mountains; Wliite and Sacra- 

 mento mountains. Deep woods, in the Canadian and Hudsonian zones. 



The plant of the WTiite and Sacramento mountains has narrower bracts and smaller 

 heads than the typical form found farther north and west. 



26. TONESTTJS A. Nels. 



Low herbaceous perennial from a thick woody root; stems simple, monocephalous; 

 leaves linear-spatulate ; bracts oblong, obtuse, the outer foliaceous; rays conspicuous, 

 numerous; achenes pubescent, the pappus white, capillary. 



1. Tonestus pygmaeus (Torr. & Gray) A. Nels. Bot. Gaz. 37: 262. 1904. 



Stenotus pygmaeus Torr. & Gray, Fl. N. Amer. 2: 237. 1841. 



Aplopappus pygmaeus A. Gray, Amer. Journ. Sci. II. 33: 239. 1862. 



Maaronema pygmaeum Greene, Erythea 2: 73. 1894. 



Type locality: "Rocky Mountains, probably in about lat. 41°." 



Range: Wyoming to northern New Mexico. 



New Mexico: Pecos Baldy; Baldy; Truchas Peak. High mountains, in the 

 Arctic- Alpine Zone. 



27. EUTHAMIA Nutt. 



Tall, paniculately branched perennial with glabrous stems and alternate linear 

 leaves; heads small, glomerately cymose, each with numerous flowers; rays small and 

 inconspicuous, more numerous than the disk flowers; achenes villous, short, turbinate; 

 receptacle fimbriolate. 



