176 BOTANICAL GAZETTE. [July, 
Ist) glume is distinctly 3-nerved below, and the texture of the 
outer glumes is usually firmer than that of the flowering ones 
which are truncate at the apex and irregularly toothed, a char- 
acter not observed in D. flexuosa. The awn in D. cespitosa, 
usually about the length of the flowering glume, is sometimes 
quite as long as in D. flexuosa. I have never seen the latter 
species from the region west of the Mississippi. 
23. (619.) TRiseruM suBsPICATUM Beauv. ; Coulter’s Man- 
ual, p. 415.—Common in meadows from 7000-9000 ft. alt., low 
elevations preferring shaded or more moist situations. 
24. (618.) TRiserum suBspicaTuM Beauv. var. MOLLE Gray. 
—Common with the preceding. 
25. (249,250,617.) Triserum Wort Vasey in Bot. Wheel- 
er’s Exped, p. 294; Scribner, Torr.Bull. X, p.64. Trisetum subspica- 
tum P. B. var. muticum Bolander, ex Thurb. in S. Wats. Bot. 
that time he questioned whether it might not prove identical with 
that species, but more recent and better material has fully es- 
tablished its specific rank. It differs in having rather stouter 
and more rigid stems, a more densely flowered and erect panicle, 
more nearly equal outer glumes and in the comparatively longer 
lee. In later publications this species has been referred to the 
genus Graphephorum, but the only character—the very short or 
nearly obsolete awn—by which it has been seperated from Trise- 
tum, is one of no generic value in itself. The fact that the flow- 
ering glumes are entire or merely obtusely two-lobed at the apex 
has no special significance as we not infrequently find the flower- 
ing glumes in T’. subspicatum terminating similarly. The plant 
in question has in all respects—stem, leaves and inflorescence— 
Trisetum Brandegei Scribn. (Torr. Bull. X, p. 64) is only a very 
robust form of T. Wolfii with 3-4 flowered spikelets. 
26. (612.) AvENa sTRIATA Michx. ; Gray, Man. 640; Coul- 
ter, Man. 415. Wooded moist meadow 
creek, alt. 6800 ft., Soda Butte creek, alt. 7200 ft. Rather rare. 
' There is another Avena which may also occur within the 
park, as it is not infrequent in the mountain districts of central 
