AGROST1S IDAHOENS1S ri. Sp.
Culms caespitose, slender, 2-4 dim tall, erect, bearing usually two distant leaves below the middle; sheaths loosely embracing the culm, the lower ones short, the uppermost one elongated 4.5 9 cm. long; ligule membranous 3-4 mm. long, obtuse, cut-toothed at the apex, minutely pubescent on the outside ; leaves narrowly linear, erect, 4-9 cm. long, 1-2 mm. wide, acuminate at the apex,. rough, particularly on the margins; panicle oblong, 6-12 cm. long, 2.5-4.5 cm. wide, the axis smooth below, slightly scabrous above as are the branches and pedicels; branches of the panicle ascend ing 5.5 cm. long or less, usually in 5's, the secondary branches.
more or less spreading ; spikelets lanceolate and acuminate when dosed, 2 mm. long, generally about equaling the pedicels, which are decidedly thickened at the apex and usually more or less spreading ; empty scales acuminate, purplish, scabrous on the keels, the first longer than the second ; flowering scale about three-fifths as long as the first scale ; palet wanting.
Collected by A. A. and E. Gertrude Heller, at Forest, Nez Perces County, Idaho, on July 16, 1896, at an altitude of 3,500 feet, no. 3431. A very delicate and beautiful member of the genus and perfectly distinct from any species of that region with which I am acquainted.