Trisetum spicatum (L.) K.Richt.

• Ctuir.

118

New Grasses.

By Dr. Geo. Vasey.

Trisetum montanum.—Culms I }£to2j4 feet high, smooth,
rather slender; cauline leaves 6 to 10 inches long, the upper
sometimes equaling the panicle, somewhat scabrous, the lower
sheaths pubescent, ligule about I line long, blunt; panicle 4
to 6 inches long, loose and open but not spreading, rays in
clusters of three to five, unequal, to lj4 inches long, suberect,
minutely scabrous, flowering nearly to the base, the longer rays
with five to seven appressed branchlets; spikelets about 2 ¿4 lines
long, two-flowered and with a minute hairy pedicel; outer
glumes unequal, acute, scarious margined, smooth, except on the
keel, the lower narrow, about 1 line long, the upper one-half
longer, broadly lanceolate; flowering glumes about 2 lines long,
narrowly lanceolate, acuminate and terminating in two short, fine
setae, obscurely five-nerved, minutely scabrous, with short hairs
at the base and on the rhachilla, the awn from about the upper
third, diverging, rather longer than its glume; palet narrow,
little shorter than its glume, bidentate; ovary not hairy at the
apex.

This must include what I published in Wheeler’s Report, Vol.
VI., as T. alpestre, Beaur., which has short leaves, and a very
different panicle and flowers. It has been mistaken for an open
panicled form of T. subspicatum.

Trisetum for Manual of North American Grasses fJY
Montana State University Herbarium (MONT)

Coll.: G. Vasey s-n.

Annot" Jp,spica.tum (L.) Richt $. /

^ J. ft. Rume l(f	Date: 23 Apr. 1VJ9

NORTH AMERICAN GRASSES,

Distributed by the U. S. Department of Agriculture.

NEW YORK BOTANICAL GARDEN

01820432

COLLECTED

01820432