FLOWERING PLANTS AND FERNS OF ARIZONA 379 



4. Leaf blades deeply dentate or lobed, not bristly-ciliate, the hairs, if any, 

 soft and slender, or glandular 1 5 . 



5. Plant densely cespitose, not bulbiferous at ")ase, copiously glandular- 

 pubescent: flowering stems several or numerous: basal leaf blades 

 flabelliform-cuneate, deeply, narrowly, and acutely 3-lobed at apex: 

 petioles very short or none: Section Mutscaria. 5. S. caespitosa. 



5. Plant not cespitose, bulbiferous at base, glabrous or sparsely pubescent : 

 flowering stems few or solitary, 1- to 3-flowered; basal leaf blades sub- 

 orbicular or reniform, palmately several-lobed or coarsely crenate; 

 petioles elongate 6. S. debili.-. 



1. Saxifraga arguta D. Don, Linn. Soc. London Trans. 13: 356. 1822. 



Micranthes arguta Small, North Amer. Fl. 22: 147. 1905. 



Baldy Peak, Apache County [Goodding 626. Feeble* and Smith 

 12514) , 11.000 feet, July and August. Montana to British Columbia, 

 New Mexico, eastern Arizona, and California. 



2. Saxifraga eriophora S. Wats., Amer. Acad. Arts and Sci. Proc. 17: 



372. 1882. 

 Micranthes eriophora Small, North Amer. Fl. 22: 142. 1905. 



Pinaleno Mountains (Graham County), Santa Rita and Santa 

 Catalina Mountains (Pima County), 6,000 to 8,500 feet, April and 

 May, type from the Santa Catalina Mountains [Lemmon in 1881). 

 Southern New Mexico and southern Arizona. 



Less pubescent specimens collected in the Mazatzal Mountains. 

 Gila County (Collom 46), seem to be intermediate between this and 

 the next species. 



3. Saxifraga rhomboidea Greene, Pittonia 3: 343. 1898. 



Mk-ranthes rhomboidea Small, North Amer. Fl. 22: 136. 1905. 



Apache County to Coconino and Gila Counties, 7,000 (?) to 11,000 

 feet, May to July. Montana to Now Mexico and Arizona. 



A small form, with scapes not more than 10 cm. long- and inflorescence 

 reduced to 1 to 3 cymules, is var. franeiscana (Small) Kearney and 

 Peebles {Micranthes franeiscana Small). It occurs on the San Fran- 

 cisco Peaks, 11,500 to 12,000 feet. 



4. Saxifraga flagellaris Willd. in Sternb., Rev. Saxifr. 25. 1810. 



LeptaseaflageUaris Small, North Amer. Fl. 22: 154. 1905. 



San Francisco Peaks (Coconino County), 9,800 to 12,000 feet, July 

 to September. Circumpolar, south in the Rocky Mountains to New- 

 Mexico and northern Arizona. 



5. Saxifraga caespitosa L., Sp. PI. 404. 1753. 



Muscaria caespitosa Haw., Saxifr. Enum. 37. 1821. 



San Francisco Peaks, 11,500 to 12.000 feet, July and August. Cir- 

 cumpolar, southward in the mountains of North America to Colorado, 

 northern Arizona, and Oregon. 



The form occurring in Arizona is var. lemmonii Engl, and Irmscher. 

 of which the type was collected on Mount Agassiz {Lemmon in 1884) . 



6. Saxifraga debilis Engelm., Acad. Nat. Sci. Phila. Proc. 1863: 62. 



1863. 

 San Francisco Peaks, 10,000 to 12,000 feet, July and August. 

 Montana to Colorado and northern Arizona. 



