322 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



Key to the species 



1. Inflorescence often paniculate (somewhat branched below), the peduncles and 

 branches commonly spreading or ascending at a wide angle; herbage villous 

 and somewhat viscid, or glabrous; hood sepal rarely less than 2 cm. high. 



1. A. COLUMBIANUM. 



1. Inflorescence racemiform, the peduncles 1-flowered, erect or ascending at a 

 narrow angle; blades of the upper leaves copiously short-pilose, at least on 

 the upper surface, deeply, narrowly, and acutely dissected; hood sepal not 

 more than 1.5 cm. high 2. A. infectum. 



1. Aconitum columbianum Nutt. ex. Torr and Gray, Fl. North Amer. 



1: 34. 1838. 



Aconitum arizonicum Greene, Repert. Spec. Novarum Regni 

 Veg. 7: 5. 1909. 



Apache, Coconino, and Pima Counties (doubtless elsewhere), 

 5,000 to 9,000 feet, rich moist soil along mountain brooks, June to 

 September, type of A. arizonicum from the Santa Rita Mountains 

 (Pringle in 1881). British Columbia to Montana, south to New Mex- 

 ico, Arizona, and California. 



A collection in Oak Creek Canyon, Coconino County, (Babcock 

 and Goddard 615), with herbage glabrous except for a few hairs on the 

 upper surface of the leaf veins, is referred to var. glaberrimum (Rydb.) 

 Kearney and Peebles (A. glaberrimum Rydb.), the type of which 

 (Palmer in 1877) may have been collected in Arizona. 



2. Aconitum infectum Greene, Repert. Spec. Novarum Regni Veg. 7: 



5. 1909. 



Known only from the San Francisco Peaks (Coconino County), 

 9,500 to 11,000 feet, July and August, type collected by MacDougal 

 (No. 396). _ 



Very similar to A. bakeri Greene, differing principally in its smaller 

 flowers. Similar forms occur elsewhere in the range of A. columbianum 

 of which A. infectum seems scarcely more than a good variety. 



7. ANEMONE 



Plants herbaceous, perennial, with erect, scapelike stems; leaves 

 basal and in an involucrelike pair or whorl subtending the inflorescence, 

 the blades pedately parted or divided ; flowers solitary on long peduncles, 

 regular, showy; perianth segments 5 to 10, all alike, petaloid; stamens 

 and pistils numerous; achenes compressed, in a dense ovoid or cylindric 

 head. 



These attractive plants are sometimes known as windflower. Some 

 of the Old World species, notably A. japonica Sieb. and Zucc, are 

 popular garden flowers. 



Key to the species 



1. Sepals 8 to 10, linear or narrowly elliptic, pink or purplish; stems from a short 

 tuberlike, sometimes forked, root, up to 40 cm. long; herbage sparsely 

 soft-pubescent or nearly glabrous; leaves ternate or biternate, the ultimate 

 divisions usually cleft or coarsely toothed; fruiting head cylindric or 

 ovoid-cvlindric 1. A. tuberosa. 



