296 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
5. Heuchera versicolor Greene, Leaflets 1: 112. 1905. 
Type Locality: Damp shady bluffs in the Black Range, New Mexico. Type col- 
lected by Metcalfe (no. 1203). 
RanaeE: Mountains of southwestern New Mexico. 
New Mexico: Hillsboro Peak; Copper Mines; Mogollon Road. Transition Zone. 
6. Heuchera pulchella Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 130. 1913. 
TYPE LocaLity: Crevices of rocks on the summit of the Sandia Mountains, New 
Mexico. Type collected by Wooton, August 4, 1910. 
Rance: Mountains of central New Mexico. 
New Mexico: Sandia Mountains; headwaters of the Pecos. 
7. Heuchera nana (A. Gray) Rydb. N. Amer, Fl. 22: 111. 1905. 
Heuchera rubescens nana A. Gray, Pl. Wright, 2: 64. 1853. 
Type Locatity: Santa Rita, New Mexico. Type collected by Wright. 
Ranae: New Mexico and Arizona to northern Mexico. 
New Mexico: Frisco Canyon near Luna; Santa Rita. Mountains. 
2. SAXIFRAGA L. 
A small herbaceous perennial less than 20 cm. high, the stems arising from a root- 
stock; leaves alternate, 5 to 7-lobed; inflorescence of a single terminal white flower 
and a cluster of bulblets; follicles mostly undeveloped. 
1. Saxifraga cernua L. Sp. Pl. 403. 1753. 
Type Locaity: ‘Habitat in Alpibus Lapponicis frequens.”’ 
Ranae: Arctic regions south to Labrador, and in the Rocky Mountains to northern 
New Mexico; also in the Old World. 
New Mexico: Top of Truchas Peak (Bailey 649), Arctic-Alpine Zone. 
3. MICRANTHES Haw. 
Perennial acaulescent herbs with very short caudices and solitary or numerous 
scapes; leaves basal, long-petiolate or decurrent into a short and broad petiole; flowers 
small, white, on crowded or paniculately branched cymes; hypanthium flat, shorter 
than the calyx; follicles more or less divergent. 
KEY TO THE SPECIES. 
Leaf blades orbicular-reniform, on petioles several times as long; 
scapes 15 to 50 cm. high, widely branched above.......... 1. M. arguta. 
Leaf blades lanceolate to ovate or oblong, on short petioles; scapes 
25 cm, high or less, the inflorescence congested. 
Bracts, calyx, scape, and lower surface of the leaves dark pur- 
plish red; inflorescence open...............-..2.---- 2. M. eriophora. 
Whole plant green; inflorescence compact.............2..-- 3. MM. rhomboidea. 
1. Micranthes arguta (D. Don) Small, N. Amer. Fl. 22: 147. 1905. 
Saxifraga arguta D. Don, Trans. Linn. Soc. Bot. 18: 356. 1822. 
Type Locauity: ‘Habitat ad oras occidentales Americae septentrionalis.”’ 
Rance: British Columbia and Montana to California and New Mexico. 
New Mexico: Santa Fe and Las Vegas mountains; Mogollon Mountains. Wet 
slopes and along streams, Transition to Hudsonian Zone. 
2. Micranthes eriophora (S. Wats.) Small, N. Amer. Fl. 22: 142. 1905. 
Saxifraga eriophora 8. Wats. Proc. Amer. Acad. 17: 372. 1882. 
TYPE LOCALITY: Santa Catalina Mountains, Arizona. 
Rana@e: Mountains of southern Arizona and New Mexico. 
New Mexico: Organ Peak (Wooton). Transition Zone. 
