Ryduerg : Rocky Mountain flora 65 



It resembles somewhat E. Palmeri, but the flowers are nearly 

 twice as large. 



Idaho: Moist places, valley of Mud Lake, Kootenai County, 

 July 25, 1892, Sandberg, MacDougal & Heller 737 (type, in herb. 

 N. Y. Bot. Card.). 



Montana: Bozeman, July 22, 1895, Rydberg 2729. 



Gayophytum Helleri Rydb. sp. nov. 



Annual; stem branched with nearly erect, strict branches, 

 1-3 dm. high, more or less pubescent with spreading hairs; leaves 

 linear, 0.5-2 cm. long, softly hirsutulous; pedicels very short, 

 even in fruit scarcely more than 1 mm. long; sepals and petals 

 scarcely I mm. long; capsules linear, erect, 8-10 mm. long, almost 

 sessile, hirsutulous, not torulose; seeds about I mm. long, strigu- 

 lose. 



This resembles G. racemosum in habit and the pod, G. caesiun in 

 pubescence and G. lasiospermum in the seeds. 



Idaho: Forest, Nez Perces County, July 16, 1896, Heller 3433 

 (type, in herb. N. Y. Bot. Gard.). 



Anogra leptophylla (Nutt.) Rydb. 

 Oenothera pallida leptophylla (Nutt.) T. & G. Fl. N. Am. 1 : 495. 



1840. 

 Oenothera leptophylla Nutt.; T. & G. Fl. loc. cit., as a synonym. 



Oenothera longissima Rydb. sp. nov. 



A tall biennial; stem strict, 5-10 dm. high, densely canescent 

 with short crinkled hairs as well as sparingly hirsute; leaves linear 

 or narrowly linear-lanceolate, I— 1. 5 dm. long, densely canescent, 

 entire, acute at both ends, the lower short-petioled; spike rather 

 lax; bracts linear-lanceolate, 2-5 cm. long; hypanthium tube 10- 

 12 cm. long, densely canescent, only slightly widening upwards; 

 sepals linear-lanceolate, about 4 cm. long; free tips about 4 mm. 

 long; petals golden yellow, 4 cm. long; stamens and pistil of about 

 the same length; capsule about 4 cm. long, densely canescent, 

 slightly tapering upwards. 



This is related to 0. macrosceles A. Gray and 0. Jamesii T. & G., 



but differs from the former in being canescent -instead of glabrous 



and in the smaller and narrower bracts, and from the latter in the 



longer, narrower and entire-margined leaves, and in being more 



canescent and less hirsute. It grows on sandy river banks at an 



altitude of about 1,600 m. 



