42 MINNESOTA STUDIES IN PLANT SCIENCE 



b. Leaves of an ovate type 



1. Leaves small, sharply dentate 



(a) Leaves shallowly dentate to subentire; petals oblong 5". parznfolia 



(b) Leaves coarsely and evenly serrate-dentate ; petals elliptic 



S. gracillima 



2. Leaves larger, repand to sinuate dentate ; petioles elongate 



(a) Leaves glabrous, thin ; petals ovate-lanceolate 5". fallax 



(b) Leaves pubescent; petals orbiculate to oval S. calif ormca 



II. Receptacle deeper ; follicles not strongly spreading 



A. Gland broad, fleshy, verrucose or convoluted, conspicuous 



a. Flowers commonly greenish ; cymules glomerate 



1. Petals mostly shorter than the sepals, sometimes longer; inflorescence 

 contracted S. nidifica 



2. Petals mostly exceeding the sepals, or wanting; inflorescence commonly 

 spicate S. montanensis 



b. Flowers white, generally conspicuous 



1. Inflorescence more or less contracted; cymules glomerate 



(a) Inflorescence stout, thyrsoid ; stout plants 5". integrifolia 



(b) Inflorescence delicate, subcapitate; delicate plants S. aprica 



2. Inflorescence broad, corymbose; petals orbicular 



(a) Leaves broadly ovate ; flowers large 5. fragosa 



(b) Leaves narrowly ovate ; flowers small 5". napensis 



B. Gland narrow, smooth; follicles short, purple, very smooth S. laevicarpa 



Saxifraga aprica Greene, Bull. Torr. Bot. Club 23 :25. 1896. 

 Saxifraga umbelhdata Greene, Erythea 1 :222. 1893. 

 Micranthes aprica (Greene) Small, N. Am. Fl. 22:2:135. 1905. 



Specimens examined : 



California : wet shady places above Donner Lake, Nevada County, July 4, 1892, 

 C. F. Sonne, No. 90 (MBG 84536) (doubtful) ; Mt. Eddy, Siskiyou County, August 

 18, 1903, Copeland, No. 3845, as Saxifraga nidifica, det. Dr. Greene; distributed by 

 C. F. Baker (MBG 84117) ; Siskiyou County, Mt. Eddyv ini open gravelly places in the 

 forest, alt. 6,800 ft., A., A. Heller, No. 12081. 



Saxifraga californica Greene, Pitt. 1 :286. 1889. 

 Saxifraga virginiensis Benth., PI. Hartw. 311. 1848. 

 Micranthes californica (Greene) Small, N. Am. Fl. 22:2:140, 1905. 

 Saxifraga virginiensis Michx. var, californica (Greene) Jepson, Fl. Mid. 

 Western Calif. 268. 1901. 



Distribution. — Central California, north and south of a line between Lake Tahoe 

 and San Francisco Bay. 



Specimens examined: 



California : Mt. Tamalpais, March 30 ,1889, E. L. Greene (UMH) ; Sonoma County, 

 March 13, 1892, Michener and Bioletti (UMH) ; near Gear Creek, Butte County, alt 

 175 ft, April 1-15, 1897, H. E. Brown, No. ISO (UMH) ; Loma Prieta, Santa Qara 

 County, eastern slope, April 1-7, 1894, /, Btirt Davy, No. 476 (UMH) ; San Juan, 

 San Benito, June, 1903, A. D. E. Ehner, No. 4911 (UMH, MBG 84118) ; Clinton, 

 Amador County, Sequoia giganfea region, March 29, 1892, Geo. Hansen, No, 92 (UMH 

 and MBG 84282) ; Mokelumne Hill, Calaveras County, alt 2,000 ft, April 1, 1896, 



