FLOWERING PLANTS AND FERNS OF ARIZONA 397 



Key to the species 



1. Hairs of the scapes (and commonly of the petioles) appressed or ascending; 

 leaves commonly somewhat glaucous, thickish: leaflets obovate-oblong to 

 nearly spatulate, long-cuneate at base, few-toothed, mainly toward the 

 apex; fruit deeply pitted, the seeds partly buried in the flesh. 



1. F. CUXEIFOLIA. 



1. Hairs of the scapes and petioles soon spreading or somewhat reflexed: leaves 

 not glaucous, thin: leaflets rhombic-ovate or obovate, short-cuneate at 

 base, toothed to well below the middle; fruit shallowly pitted, the seeds 

 superficial 2. F. califorxica. 



1. Fragaria cuneifolia Nutt. ex Howell, Fl. Northwest Amer. 1: 174. 



1S9S. 



Fragaria oralis (Lehm.) Rvdb., Torrev Bot. Club Bui. 33: 143. 

 1906. 



Apache, Navajo, and Coconino Counties, south to Cochise and Pima 

 Counties, 7.000 to 11,000 feet, common in coniferous forests, May to 

 October. Idaho to British Columbia, south to New Mexico. Arizona, 

 and Oregon. 



2. Fragaria californica Cham, and Schiecht., Linnaea 2: 20. 1827. 



Fragaria bracteata Heller, Torrev Bot. Club Bui. 25: 194- 

 1896. 



Pinaleno Mountains, Graham County (Shreve 5231), Chiricahua 

 Mountains. Cochise County (Eggleston 10805), 8,000 to 9,000 feet, 

 June to September. Montana to British Columbia, New Mexico, 

 southeastern Arizona, and California. 



11. POTENTILLA. 59 Cinqtjefoil 



Plants biennial or perennial, mostly herbaceous (one species 

 shrubby); stems leafy or scapose, often from a somewhat woody 

 branched caudex or rootstock; inflorescence cymose (the flowers 

 seldom solitary); sepals alternating with bractlets; petals commonly 

 yellow but sometimes whitish, red, or purple; stamens 5 to many, 

 inserted at base of the low receptacle or on the margin of the flat to 

 hemispheric hypanthium; pistils few to numerous, the style basal to 

 terminal; fruits of achenes. 



Some of the species are grazed by sheep. 



Key to the species 



1. Styles lateral: petals yellow or yellowish (2). 



2. Achenes silky- villous; plant shrubby, the bark shreddy ; leaves pinnately 3- to 



7-foliolate, sericeous, the leaflets linear or narrowly oblanceolate, entire: 



flowers large and showy, the petals bright yellow, 10 mm. long or longer, 



much surpassing the bractlets and sepals; stamens and pistils numerous: 



Section Dasiphora 1. P. pbuticosa. 



2. Achenes glabrous: plants herbaceous (3). 



3. Plants caulescent, viscid- villous; steins 30 cm. long or longer, leafy: basal 

 leaves pinnate, with 5 to 9 broadly ovate or obovate, coarsely toothed 

 leaflets; stamens and pistils numerous; style attached near the base of 

 the achene: Section Drymocallis \ . 

 4. Herbage conspicuously villous: leaflets thickish, densely pubescent to 

 glabrate above, the terminal one oval to rhombic-obovate: inflores- 

 cence dense, strict; sepals at anthesis 5 to 9 nun. long. 



2. P. A.RGUTA. 



"The writers an- indebted to David J). Keck for valuable suggestions concerning this genus. 



