54 Graminaceae 
G. Spikelets nearly sessile, in dense I-sided clusters at the ends of the few panicle- 
branches. DactTyLis (p. 57) 
GG. Spikelets not in dense |-sided clusters at the ends of the panicle-branches. 
H. Spikelets as wide as long, somewhat heart-shaped. BRIZA (p. 57) 
HH. Spikelets much longer than wide, not heart-shaped. 
I. Keels of the palet with a distinct crest or wing-like appendage. 
PLEUROPOGON (p. 57) 
II. Keels of the palet not winged. 
J. Lemma somewhat keeled on the back. 
K. Lemma 2-toothed at apex, very rarely awnless; stigma arising below 
apex of ovary. Bromus (p. 65) 
KK. Lemma acute or obtuse, not 2-toothed, not awned; stigma arising at 
apex of ovary. 
L. Glumes with 1—3 veins. Poa (p. 57) 
LL. Glumes with 5 or more veins. DISTICHLIS (p. 57) 
JJ. Lemma rounded on the back, not at all keeled. 5 
M. Upper lemmas of spikelet sterile and folded about each other. 
MELIcA (p. 56) 
MM. Upper lemmas of spikelet either perfect, or else narrow and abor- 
tive but not folded about each other. 
N. Lemma 2-toothed at apex, mostly awned from just below the 
apex; stigmas arising below apex of ovary. Bromus (p. 65) 
NN. Lemma not 2-toothed at apex; lemma-awn none or at the very 
apex; stigmas arising at apex of ovary. 
O. Lemma acute, often awned, not scarious at apex; lemma-veins 
not prominent. FESTUCA (p. 62) 
OO. Lemma obtuse, awnless, scarious at tip. 
P. Lemma prominently 5—9-veined; style present; lodicules 
united. GLYCERIA (p. 61) 
PP. Lemma obscurely 5-veined; style none; lodicules separate. 
PUCCINELLIA (p. 62) 

MUNROA 
Annual, low, diffusely many-stemmed. Leaf-blades short, usually sharnepeinteae 
clustered at the ends of the branches. Spikelets 2—-4-flowered, perfect, nearly sessile, 
3—5 together in a bunch in the axil of the floral leaves; rachilla jointed above the 
empty glumes. Glumes lanceolate, acute, hyaline, |-veined. Lemma 3-veined, entire 
or retuse or 3-cleft, the mid-vein or all the veins excurrent as short mucronate points. 
Palet hyaline, enclosed within the lemma. Stamens 3. Grain enclosed, not adherent. 
On dry soil. (Honor of Gen. Wm. Munro, an English agrostologist.) E. 
M, squarrosa Torr. (False Buffalo-grass) 
PHRAGMITES 
Perennial, tall, reed-like. Leaf-blades firm, wide, flat. Spikelets loosely 3—-7- 
flowered, in a large much-branched panicle; rachilla jointed above the glumes and be- 
tween the flowers, covered with long silky hairs; lowest flowers staminate or empty, the 
others perfect. Glumes thin, lanceolate, unequal, acute. Lemma glabrous, very narrow, 
long, acuminate. Palet much shorter than the lemma, hyaline, 2-ribbed. Stamens 3. 
Grain enclosed, not adherent. Along fresh-water shores. (Gk. phragmites—growing 
in hedges; referring to its hedge-like growth along ditches.) E. (P. phragmites.) 
P. communis Trin. (Reed) 
2 phan Ph ar 2 
Ley pal peal LA See adeaND MN) 02 
they sats 
® Soak rt-e 
«rare 
ee 
