WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 733 



14. Tetraneuris angustifolia Rydb. Bull. Torrey Club 32: 128. 1905. 



Type locality: White Mountame, New Mexico. Type collected by Wooton 

 (no. 374). 



Range: Colorado to New Mexico and Texas. 



New Mexico: White Mountains. Hills and mountains, in the Upper Sonoran and 

 Transition zones. 



117. ACHILLEA L. Yarrow. Sneezeweed. 



Perennial herbs with erect leafy stems, finely dissected, alternate, strong-scented 

 leaves, and small heads in corymbs at the ends of the branches; involucres campanu- 

 late, of appressed imbricated bracts, the outer ones shorter; achenes oblong or 

 ob ovoid, slightly compressed; pappus none. 



key to the species. 



Leaves glabrate, green; heads rather few, loosely corymbose, 6 to 7 



mm. high, long-pedunculate 1. A. laxiflora. 



Leaves densely arachnoid; heads numerous, in a dense corymb, 

 about 4 mm. liigh, short-pedunculate. 

 Bracts with pale brownish margins; plants 25 to 80 cm. high.. 2. A. lanulosa. 

 Bracts with dark brown, nearly black margins; plants less than 



20 cm. high 3. A. subalpina. 



1. Achillea laxiflora Pollard & Cockerell, Proc. Biol. Soc. Washington 15: 179. 1902. 

 Type locality: Sandia Mountains, New Mexico. Type collected by Miss Charlotte 



C. Ellis in 1900. 



Range : Mountains of northern New Mexico. 



New Mexico: Sandia Mountains; Carrizo Mountains {Standley 7379). Transition 

 Zone. 



The type of the species is a mere fragment, consisting of the terminal portion of a 

 branch with two small leaves. The plant from the Carrizos seems to be the same, 

 although the inflorescence is composed of more numerous heads in a denser corymb. 

 The latter plant grew in oak thickets among pine trees. It is from 80 to 100 cm. high, 

 with numerous large, broad, bright green leaves, the upper ones but little reduced. 

 The leaf segments are widely spaced on the rachis, not crowded as in .dL. lanulosa, and 

 they are much larger than in that species. 



2. Achillea lanulosa Nutt. Joum. Acad. Phila. 7: 36. 1834. 

 Type locality: Rocky Mountains. 



Range: British Columbia and South Dakota to Kansas and Texas and southward. 

 New Mexico: Common in all the higher mountains. Meadows, in the Upper 

 Sonoran and Transition zones. 



3. Achillea subalpina Greene, Leaflets 1: 145. 1905. 



Achillea lanulosa alpicola Rydb. Mem. N. Y. Bot. Gard. 1: 426. 1900. 

 Achillea alpicola Rydb. Bull. Torrey Club 33: 157. 1906. 

 Type locality: Subalpine slopes of Mount Ouray, southern Colorado. 

 Range: Montana to northern New Mexico. 



New Mexico: Truchas Peak; Jemez Mountains; Pecos Baldy. High mountain 

 meadows, in the Arctic-Alpine Zone. 



118. ANTHEMIS L. 



Glabrous or pubescent, branched, ill-scented annual with dissected leaves; heads 

 pedunculate, the receptacle convex, bearing filiform bracts; rays white; achenea 

 10-ribbed, rugose; pappus none. 



