506 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



medicinally as an astringent and the Arizona species may have the 

 same property. These plants grow in rich soil, mostly in coniferous 

 forests. 



Key to the species 



1. Plant annual or biennial, without a thick caudex, the taproot slender; petals 

 not, or scarcely, surpassing the sepals, pale pink; plant pilose, usually 

 glandular-pubescent in the inflorescence; leaf blades 5-parted, the divisions 



cleft into linear or narrowly oblong lobes 1. G. carolinianum. 



1 . Plant perennial, with a thick caudex, the taproot stout, woody ; petals surpassing 



the sepals, usually considerably (2) . 



2. Tips of the sepals 2 to 3 mm. long; lobes and teeth of the leaf blades acute 



or acuminate; stems usually slender, with subappressed, mostly retrorse 



hairs; leaf blades sparsely strigose or glabrate; pedicels with or without 



glandular pubescence; petals more than 10 mm. long, spreading (3). 



3. Petals white, usually with conspicuous dark veins; stems commonly 



sparsely pubescent 2. G. richardsonii. 



3. Petals purplfsh pink; stems rather copiously pubescent. 



3. G. EREMOPHILUM. 



2. Tips of the sepals not more, usually less, than 2 mm. long; lobes and teeth of 

 the leaf blades obtuse or acutish (4). 



4. Petals white or whitish, not more than 10 mm. long; stems and petioles 



hirsute with spreading or retrorse hairs; pedicels glandular-pubescent; 



sepals sparsely hirsute 4. G. wislizeni. 



4. Petals normally purplish pink to rose purple, commonly more than 10 mm. 

 long (5). 

 5. Stems densely and conspicuously villous-viscid with long, spreading 



hairs; petals spreading, sometimes white 5. G. parryi. 



5. Stems not conspicuously long-villous, the nonglandular hairs mostly 

 short and retrorse or subappressed, the glandular hairs, if any, short 

 and spreading; petals reflexed, pink to deep rose purple. 



6. G. ATROPURPUREUM. 



1. Geranium carolinianum L., Sp. PI. 682. 1753. 



Mazatzal and Pinal Mountains (Gila County), about 3,500 feet, 

 April. Canada to northern Mexico, widely distributed in the United 



States. 



This is the only Arizona species that is not forest inhabiting. 



2. Geranium richardsonii Fisch. and Trautv., Index Sem. Hort. Petrop. 



4: 37. 1837. 

 Apache County to Coconino County, south to Cochise and Pima 

 Counties, 7,500 to 11,500 feet, common, April to October. South 

 Dakota to New Mexico, Arizona, and southern California. 



3. Geranium eremophilum Woot. and Standi., Contrib. U. S. Natl. 



Herbarium 16: 142. 1913. 



White Mountains (Apache or Navajo County), to Cochise and Pima 

 Counties, 7,000 (?) to 9,200 feet, July to October. Southwestern New 

 Mexico and eastern Arizona. 



Closely related to G. richardsonii. 



4. Geranium wislizeni S. Wats., Amer. Acad. Arts and Sci. Proc. 21: 



421. 1886. 

 Ramsey Canyon, Huachuca Mountains (Cochise County), Syca- 

 more Canyon near Ruby (Santa Cruz County), 3,600 to 6,000 feet, 

 August to September. Southern Arizona and northern Mexico. 



