WOOTON AND STANDLEY^ — ^FLORA OF NEW MEXICO. 503 



1. Dasystephana romanaovii (Ledeb.) Rydb. Bull. Torrey Club 33: 148. 1906, 

 Gentiana romanzovii Ledeb.; Bunge, Nouv. Mem. Soc. Nat. Moscou 1: 215. pi. 11. 



f. 1. 1829. 

 Gentiana frigida of authors, not Haenke, 1788. 

 Type locality: Gulf of St. Lawrence, Siberia. 



Range: Alaska to Montana, Utah, and New Mexico; also in Siberia. 

 New Me.xico: Santa Fe and Las Vegas Mountains. High mountain meadows, 

 in the Arctic-Alpine Zone. 



2. Dasystephana parryi (Engelm.) Rydb. Bull. Torrey Club 33: 149. 1906. 

 Gentiana 2)amji Engelm. Trans. Acad. St. Louis 2: 218. pi. 10. 1863. 



Type locality: "Near the base of Alpine slopes on the Snowy Range, Colorado." 

 Range: Wyoixung to Utah and New Mexico. 



New Mexico: Baldy; Taos Mountains; Costilla Pass; Santa Fe and Las Vegaa 

 mountains. Mountain meadows, in the Hudsonian and Arctic-Alpine zones. 



3. Dasystephana rusbyi (Greene) Woot. & Standi. Contr. U. S. Nat. Herb. 16: 



159. 1913. 

 Gentiana rusbyi Greene; A. Gray, Syn. Fl. 2': 406. 1878. 



Type locality: Mogollon Mountains, New Mexico. Type collected by Rusby in 

 1881. 

 Range : Known only from type locality. 



4. Dasystephana bigelovii (A. Gray) Rydb. Bull. Torrey Club 33: 149. 1906. 

 Gentiana bigelovii A. Gray, Proc. Amer. Acad. 19: 87. 1883. 



Type locality: Sandia Mountains, New Mexico. Type collected by Bigelow in 

 1853. 



Range: Colorado and New Mexico. 



New Mexico: Sandia Mountains; Upper Pecos; Beulah; Lincoln National Forest; 

 Castle Rock. Mountains, in the Transition Zone. 



5. Dasystephana interrupta (Greene) Rydb. Bull. Torrey Club 33: 149. 1906. 

 Gentiana interrupta Greene, Pittonia 4: 182. 1900. 



Type locality: Meadows along streams at Pagosa Springs, southern Colorado. 



Range: Colorado to Nevada and New Mexico. 



New Mexico: Dulce; Upper Pecos; Chicorico Canyon; Sandia Mountains; Carrizo 

 Mountains; West Fork of the Gila; \Miite Mountains. Meadows in the mountains, 

 in the Transition Zone. 



10. PLEUROGYNA Eschsch. 



Slender glabrous annual with linear leaves and whitish flowers in a narrow panicle; 

 corolla rotate or campanulate, pentamerous; pedicels slender, erect; sepals linear, 

 green; stamens inserted on the corolla tube near its base; style none, the stigmas decur- 

 rent along the sutures of the ovary. 



1. Pleurogyna fontana A. Nels. Proc. Biol. Soc. Washington 17: 177. 1904. 

 Type locality: Crow Creek, Colorado. 

 Range: Wyoming to northern New Mexico. 

 New Mexico: Costilla Valley (TFoofon). Bogs. 



Order 44. ASCLEPIADALES. 



KEY TO THE FAMILIES. 



Styles united; stamens distinct or gynandrous; 



pollen loosely granular 114. APOCYNACEAE (p. 504). 



Styles distinct; stamens monadelphou.s; pollen 



united into waxy masses, or the grains in 



groups of 4 115. ASCLEPIADACEAE (p 506). 



