G4 
Monspelieji 
(C ariindinacea^ var. pcndula^ Gray.) A 
Cinna latifoh , ^ ^ 
large form, with the rather small spikelets crowded at the ends of the 
branches, and having a rudiment a fourth of a line long. 
Deyeuxia (vquivalvis, Benth. {Agrostis, Trin.) 
Deyeuxia Canadensis {Calamagrostis^ Beauv.) 
Deyeuxia Langsdorfii, Kth. {Calamagrostis, Trin.) 
Deyeuxia neglecta^ Kth. {Calamagrostis, Gaertn.; C. stricta, Trin.) 
D^'EUXTA TwEEDYi, n, sp, Culms stout, 2 — 4 ft. high, smooth; 
leaves flat, | an inch wide or less, 2 — 4 in. long, with acute, rigid 
tips, minutel} 
lacerated 
below 
1^ - 1^ 
lanceolate, acute 
and 
lin. long. 
scabrous above, smooth beneath ; ligule elongated, 
panicle narrow, dense, 3 — 4 in. long, often interrupted 
spikelets crowded on the short (i in. or less), more or less 
spreading, very compound branches ; outer glumes 2| — 3 
or sub-acuminate, membraneous 
finely scabrous on the back, the upper 3- 
nerved below ; flowering-glume a little shorter 
than the outer ones, of similar texture, and, like 
them, minutely scabrous (becoming firmer and sub- 
rugose 
in fruit), 5-nerved, two-cleft at the tip, 
with the lateral nerves sometimes projecting into 
four unequal teeth ; awn stout, attached a little be- 
low the middle of the glume, about 3 lines long, 
twisted below, bent near the middle, and projecting 
beyond the glumes ; palea broad and equalling its 
glume ; hairs few, those at the side, which are long- 
hairs, 
i 
its 
about one-half the length of the floret 
\ 
anthers large, 
(Fig 
I. Outer glumes 
Fig. 2, Floret, with rudi- 
ment. Fig. 3. A stamen. All enlarged.) 
Cascade Mountains, Washington Territory, Col- 
lected by Mr. Frank Tweedy of the Corps of Topo- 
graphical Engineers in the service of the Transcon- 
tinental Survey. Mr. Tweedy has been a careful 
and zealous collector of the plants of the various sections of our 
country which he has visited, and it is with pleasure that I dedicate 
this species to him. 
Deschampsia elongata, Munro. {Aira, Hook.) 
Deschampsia calycijia, Presl. {Aira danthonioides, Trin.) 
Deschampsia ccespitosa, Beauv. {Aira, Lin.) 
Deschampsia I at if alia {Air a, Hook.) 
Trisetiim cemuum^ Trin. 
Triseium cancscens^ Buckley. A slender, few-flowered form. 
Trisetum subspicaium^ var. niolle^ Gray. 
Triseium Wolfii, Vasey. {T. stibspicatum, var. ^nuticuin^ Bolander.) 
Trisetum Brandegei, n. sp. Culms rather stout, erect or genic- 
ulate at the base, i 
than 
2 ft. high, smooth, leafy ; sheaths loose, longer 
their internodes, smooth below, scabrous near the throat ; 
leaves flat, about 6 inches long (the upper one 3—4 inches long and 
from 3—4 lines wide), scabrous on both sides with a few scattered hairs; 
