WF wie 
Graminaceae 63 
GG. Spikelets 1—3-flowered, 5—-7 mm. long; glumes 3—5 mm. long. 
U: F, microstachys Nutt. (Small Fescue) 
FF. Lemma not hairy. 
H. Only the chief panicle-branches spreading; most of the spikelets 1|—3- 
flowered. W. E. 
F. pacifica Pip. 
HH. All the spikelets spreading; most of the spikelets 3—6-flowered. E. 
(F. microstachys pauciflora.) 
F. reflexa Buck. 
CC. Panicle narrow and long, its branches erect or appressed. 
I. Lower glume | /3—1!/4 as long as the upper. 
J. Lemma not ciliate. W. 
F, myurus L. (Rat-tail Fescue) 
JJ. Lemma ciliate. W. E. 
F. megalura Nutt. 
IT. Lower glume 2/3—3% as long as the upper. W. 
F. bromoides L. 
AA. Perennial; stamens 3. 
K. Awyn as long as the lemma or longer. 
L. Leaf-sheath somewhat scabrous or hispid. 
‘M.  Lemma-awn from a cleft apex, 8 mm. or less long; glumes lanceolate; flow- 
ers not stipitate. U. 
F, elmeri 8. & M. 
MM. _ Lemma attenuate into an awn; awn often over 8 mm. long; glumes subu- 
late. 
N. Flowers not stipitate at base; leaf-blade scabrous beneath; panicle-rays 
| mostly in groups of 2; upper glume 3-veined; lemma 3-veined. W.E. (F. 
jonesit. ) F. subulata Trin. 
NN. Flowers long-stipitate at base; leaf-blade smooth beneath; panicle- 
rays nearly always solitary; glumes both |-veined; lemma 5-veined. W. 
(F. denticulata.) F, subuliflora Scribn. 
LL. Leaf-sheath quite smooth and glabrous. 
O. New shoots coming from inside the leaf-sheath; stems 2-jointed; spikelets 
not glaucous. W.C.E. (F. ovina polyphylla.) 
F. occidentalis Hook. 
OO. New shoots arising from outside the leaf-sheath; stems 3—4-jointed; spike- 
lets often glaucous. F. rubrg 2nd varieties. (See R.) 
KK. Awyn shorter than the lemma or none. 
P. Leaves narrow, involute; plants usually tufted. 
Q. Leaf-blades not dropping from their sheaths; palet obtuse. 
R. Leaf-blades quite smooth; young shoots arising outside the leaf-sheath; 
spikelets often glaucous. 
S. Spikelets glabrous or merely scabrous. 
T. Inflorescence not dense; stem-leaves flat or folded. 
U. Leaves and usually the spikelets also green. 
V. Spikelets 7—8 mm. long. 
W. Basal leaves involute, lemma linear-lanceolate. W. E. 
(F. amethystina and F. rubra trichophylla for our region.) 
F. rubra L. (Red Fescue) 
WW. Basal leaves flat; lemma lanceolate. E. 
F. rubra multiflora A. & G. 
VV. Spikelets 1O—12 mm. long. W. E. 
F, rubra megastachys Gaud. 
