40 Graminaceae 
A. Inflorescence head-like or spike-like, 1—10 cm. long; lower glume with a widely or 
narrowly winged keel. 
B. Inflorescence an ovoid head-like cluster; lower glume very wide, with keel widely 
winged. E. P. canariensis L. 
BB. Inflorescence an oblong spike-like cluster; lower glume not strikingly wide, 
with keel narrowly winged above the middle. W. 
P. amethystina Trin. (Purple Canary-grass) 
BBB. Inflorescence a cylindric spike-like cluster; lower glume not strikingly wide, 
with keel widely winged. U. E. 
P. caroliniang Walt. (Southern Canary-grass) 
AA. Inflorescence a narrow panicle but too often to be head-like or spike-like, |0—20 
cm. long; lower glume not winged. C. E. 
P. arundinacea L. (Reed Canary-grass) 
ANTHOXANTHIUM 
Annual or perennial, sweet-scented. Inflorescence a spike-like panicle. Spikelets 
narrow, slightly compressed, pedicelled. Glumes very unequal, the lower smaller, acute 
(ours) to short-awned, persistent. Sterile lemmas 2-lobed, hairy, usually awned, longer 
than the fertile flower; fertile lemma truncate, with 3 quite delicate veins, awnless, its 
palet faintly |-veined. Stamens 2. Stigmas plumose. (Gk. anthos—flower, xanthos= 
yellow.) W. A. odoratum L. (Sweet Vernal-grass) 
HIEROCHLOE (Savastana) HOLY-GRASS 
Perennial, aromatic. Inflorescence a panicle, open (ours) or somewhat contracted. 
Spikelets with | perfect and 2 staminate flowers. Glumes subequal, about the length 
of the spikelet, boat-shaped, shining, acute, glabrous, obscurely 1—~—3-veined. Sterile 
lemmas nearly as long as the glumes, boat-shaped, indurated, hairy, obtuse or emarginate 
or bifid, the chief vein often prolonged as a short awn, each enclosing a .2-veined hyaline 
palet and 3 stamens; fertile lemma hairy at apex, 5-veined, obtuse, often short-awned, 
enclosed |-veined palet and perfect flower with 2 stamens. (Gk. hieros=holy, chloe—= 
grass; strewn before church doors on saints’ days in Europe.) 
A. Leaves 2—7 mm. wide, 0.2—2 dm. long; glumes 4 mm. long, acuminate. E. 
H. odorata R. & S. (Vanilla-grass) 
AA. Leaves 9-—13 mm. wide, 3——5 dm. long; glumes 5 mm. long, obtuse. W. 
H. macrophylla Thurb. (Large. Vanilla-grass) 
AGROSTEAE. (Timotuy Trine)—Spikelets with | perfect flower. Rachilla 
sometimes prolonged beyond the palets into a naked or plumose bristle. Glumes 2 (none 
in Coleanthus), subequal or unequal, usually as long as the lemma or longer. Palet 
veinless or 2-veined, but |-veined in Cinna and wanting in some species of Agrostis. 
Grain unfurrowed. 
A. Plants 2—8 cm.-high; glumes none; spikelets hardly | mm. long. 
COLEANTHUS (p. 43 
AA. Plants taller; glumes present; spikelets longer. 
B. Inflorescence a dense spike-like (timothy-like) cluster. 
C. Lower glume 4—6 times as long as the lemma not considering awn, and at 
least a half longer than the upper glume; glumes awnless; lemma-awn terminal, 
3—5 mm. long. GASTRIDIUM (p. 45) 
CC. Not as above in all characters. 
D. Lemma with a terminal awn 0.5—10 mm. long. 
