356 A. S, Hitchcock. 
XCV. A. S. Hitchcock, Agrostis genus novis speciehus 
Americae septentrionalis auctum. 
(Ex: U. S. Departement of Agriculture, Bureau of Plant Industry. — 
Bull. no. 68. 1905, 68 pp.) 
1. Agrostis ($ Podagrostis) thurberiana A. S. Hitche., l. c., p. 23. 
Culms tufted, slender, 20—40 em high, somewhat decumbent at base. 
Basal leaves rather numerous, the blades lax, light green, slightly 
scabrous, about 10 cm long and 2 mm wide; culm leaves 2 or 3, the 
uppermost about the middle of the culm, the blade only about 5 cm 
long; ligule semicireular, 6 mm long. Panicle narrow and lax, more or 
less drooping, 5—8 cm long; branches few, slightly scabrous, 2—4 in 
each whorl, flower-bearing from about the middle. Spikelets green or 
pale, rarely purple, 2 mm long; empty glumes equal, acute but scarcely 
pointed; flowering glume nearly as long as the empty glumes, obtuse, 
faintly 5-nerved; palet about 1,3 mm long; rudiment usually about 
l/, mm long, minutely hairy; callus very minutely hairy. 
The above description is based upon the type specimen. In other 
specimens the width of the leaves may be 2—4 mm and the panicle may 
be as much as 15 em long; the palet varies from !/, to J, the length 
of the flowering glume. 
A. thurberiana differs from À. aequivalvis Trin. in the wider, more 
numerous, and more lax leaves, smaller spikelets, shorter palet and 
pedicel, and the usually narrower and less spreading panicle. 
The species was first mentioned as a nomen nudum in a list of 
grasses by Doctor Bolander: „Agrostis Hillebrandii (Thurb.), Sierras (Doctor 
Hillebrand). Little known as yet.“ —- Bolander, Trans. Calif. State Agric. 
Soc. for 1864 and 1865 (1866). The name also appears in the Index 
Kewensis as a synonym of A. aequivalvis Trin. As the name was first 
mentioned as a nomen nudum and later as a synonym it seems advisable 
to publish the species under a different name. 
The type specimen of A. thurberiana was collected by W. N. Suks- 
dorf (No. 1021) in wet places on mountains, Skamania County, Wash. 
August 28, 1890. (PL I, fig. 1.) 
Distribution: British Columbia and Montana to California and Utah. 
British Columbia: Chilliwack Valley, Macoun 26042, 26043; 
Asulkan Glacier, Selkirk Mountains, Macoun 3. Washington: Mount 
Adams, Suksdorf 24, 194; Nason Creek, Sandberg and Leiberg 676. 
Oregon: Mount Hood, Hall 618; Eagle Creek, Cusiek 1069. Montana: 
Gallatin River, Tweedy 1019. Wyoming: Teton Forest Reserve, Tweedy 
30. Utah: Alta, Wasatch Mountains, Jones 1275; Salt Lake City, Jones 
1008. California: Pine Creek, Davy; Lake Chiquita, Congdon 16: 
