r? 



WOOTON AND STANDLEY FLOE A OF NEW MEXICO. 297 



3. Micraiith.es rhomboidea (Greene) Small, N. Amer. Fl. 22: 136. 1905. 



Saxifraga rhomboidea Greene, Pittonia 3: 343. 1898. 



Type locality: Colorado Rocky Mountains. 



Range: Montana to New Mexico. 



New Mexico: Wheeler Peak; Santa Fe and Las Vegas mountains. Moist ground, 

 Transition to Arctic-Alpine Zone. 



4. LEPTASEA Haw. 



More or less matted herbaceous perennials, with well developed leafy caudices and 

 leafy flower stalks a few centimeters high; leaves simple, alternate, thickish, often 

 clustered at the base; flowers few or rather numerous; sepals 5; petals 5, usually 

 clawed, white or yellow; stamens 10; ovary mostly superior; carpels united to above 

 the middle; follicles erect with spreading tips. 



KEY TO THE SPECIES. 



Petals white, dotted with yellow and purple 1. L. austromontana. 



Petals yellow. 



Leaf blades spine-tipped 2. L. flagellaris. 



Leaf blades not spine-tipped 3. L. chrysantha. 



1. Leptasea austromontana (Wiegand) Small, N. Amer. Fl. 22: 153. 1905. 

 Saxifraga austromontana Wiegand, Bull. Torrey Club 27: 389. 1900. 

 Saxifraga cognata E. Nelson, Bot. Gaz. 30: 118. 1900. 



Type locality: Not definitely stated. 



Range: Alberta and British Columbia to Washington, Montana, and New Mexico. 

 New Mexico: Santa Fe and Las Vegas mountains; Hillsboro Peak; White Moun- 

 tains. Damp cliffs, in the Transition and Hudsonian zones. 



2. Leptasea flageUaris (Willd.) Small, N. Amer. Fl. 22: 154. 1905. 

 Saxifraga flagellaris Willd.; Stemb. Rev. Saxifr. 25. 1810. 



Type locality: Caucasus. 



Range : Arctic regions, south in the Rocky Mountains to Arizona and New Mexico. 



New Mexico: Baldy; Wheeler Peak; Pecos Baldy. Arctic- Alpine Zone. 



3. Leptasea chrysantha (A. Gray) Small, N. Amer. Fl. 22: 152. 1905. 

 Saxifraga chrysantha A. Gray, Proc. Amer. Acad. 12: 83. 1877. 



Type locality: "High alpine region of the Colorado Rocky Mountains, especially 

 abundant on Torrey 's and Gray's peaks." 



Range: Colorado and northern New Mexico. 



New Mexico: ^\^leeler Peak; Truchas Peak; Pecos Baldy; Bartlett Ranch; 

 Mountains, in the Arctic-Alpine Zone. 



5. LITHOPHRAGMA Nutt. 



Slender perennial with low simple stems and bulblet-bearing rootstocks; leaves 

 mostly basal, temately divided, the divisions again subdivided; hypanthium cam- 

 panulate; petals white, clawed, digitately cleft, longer than the sepals; stamens 10, 

 included; gynoecium 1-celled, 3-valved. 



1. Lithophragma australis Rydb. N. Amer. Fl. 22: 86. 1905. 



Type locality: Rocky hillsides. Cedar Creek, Arizona. 



Range: Wyoming to Arizona and New Mexico. 



New Mexico: Hills near Tierra Amarilla {Eggleston 6442, 6579). Open slopes, in 

 the Transition Zone. 



