‘ 
Graminaceae 39 
terminal, |-sided. Glumes unequal, spiny, hispid, mucronate, margin inrolled except at 
tip where palet is not included. Sterile lemma similar to glumes, awned from apex or 
sometimes mucronate only, enclosing a hyaline palet. Fertile lemma and palet charta- 
ceous, acuminate . (Gk. echinos=a hedgehog, chloa—grass; referring to the bristling 
awns.) W.E. (Panicum crus-galli.) 
E. crusgalli Beauv. (Barnyard Grass) 
CHAETOCHLOA (Setaria) FOX-'TAIL 
Annual, erect. Leaves flat. Intlorescence terminal, a spike-like panicle. Spike- 
lets |-flowered, but with a staminate or neutral one below, jointed with the pedicel, 
awnless, but rachilla with few to many persistent awn-like branches below the joint. 
Glumes 2, membranous; lower glume the smaller. Lemma of sterile flower larger than 
or equaling the upper glume, membranous; lemma of fertile flower firm. Palet of 
fertile flower of same texture as its lemma. Stamens 3. (Gk. chaeta—a bristle, chloa— 
grass; referring to the bristly spikes.) W. E. 
C. viridis Scribn. (Green Fox-tail) 
ORYZEAE (Rice TriBE)—Spikelets flat, with | terminal unisexual or perfect 
flower enclosed by a lemma and a palet; palet usually 1-veined. Glumes none (ours) or 
2. Stamens frequently 6. Grain furrowed. 
HOMALOCENCHRUS 
Perennial. Spikelets in loose panicles, perfect or sterile. Lemma _boat-shaped, 
awnless, clasping the palet by a pair of strong marginal veins. Palet of texture like 
lemma, |-veined, much narrower. Stamens I—6 (3 in ours). (Gk. omalos—=re- 
semblance, kenchros—millet; hence millet-like.) W. E. 
H. oryzoides Poll. (Rice Cut-grass) 
PHALAREAE (Canary-crass TRIBE)—Leaf-blades flat (ours). Spike- 
lets of | perfect flower with 2 sterile or staminate lemmas below it and falling attached 
to it. Palet 0—2-veined, enclosed in feitile lemma. Stamens 2—3. Stigmas plumose. 
Grain unfurrowed, enclosed, free. 
A. Spikelets in spike-like or head-like clusters. 
B. Glumes equal; sterile lemmas awnless; stamens 3; plant not sweet-scented. 
, PHALARIS (p. 39) 
BB. Glumes unequal, lower about 1/4 the upper; sterile lemmas awned; stamens 
2; plant markedly sweet-scented. ANTHOXANTHIUM (p. 40) 
AA. Spikelets in loose panicles. 
C. Plant not sweet-scented; spikelets |-flowered; sterile lemmas subulate. 
PHALARIS (p. 39) 
CC. Plants strongly sweet-scented; spikelets 3-flowered, the lower 2 flowers stam- 
inate; staminate lemmas _boat-shaped. HIEROCHLOE, (p. 40) 
PHALARIS CANARY-GRASS 
Annual or perennial. Inflorescence a head, or a spike-like or narrow panicle. 
Spikelets flat. Glumes boat-shaped, much exceeding the flower. Sterile lemmas small, 
narrow, appearing like hairy scales attached to the fertile flower; fertile lemma indurated 
and shining in fruit, enclosing a faintly 2-veined palet. Stamens 3. Grain oblong, 
smooth. (Gk. phalaros—brilliant; referring to the shining seed.) 
