Graminaceae 7\ 
SECALE RYE 
Annual, erect. Leaves flat. Spikelets in a dense spike, usually 2-flowered, sessile, 
solitary, at the notches of the continuous rachis. Glumes very narrow, rigid, subulate- 
pointed. Lemma wider than the glumes, sharply keeled at base, 5-veined, long-awned 
from apex. Palet a little shorter than the lemma, narrow, 2-keeled. Stamens 3. Grain 
oblong, nearly terete, grooved, hairy at tip, free. (Celtic sega==sickle; hence a grain 
for cutting.) W. E. S. cereale L. (Cultivated Rye) 
TRITICUM WHEAT 
Annual or biennial, erect. Leaves flat. Spikelets in a 2-sided spike, 2—5-flow- 
ered, | at each notch of the rachis. Glumes rigid, 3- to many-veined, I- to many- 
awned or abruptly toothed at tip. Lemma rounded on the back, many-veined, with | 
to several teeth or awns at tip. Stamens 3. Stigmas plumose. Grain flat or oblong, 
deeply grooved, hairy at tip, free or adherent. (L. tritum—rubbed or ground; because 
it was made into flour.) W. E. 
7 vulgare L. (Cultivated Wheat) 
HORDEUM BARLEY 
Annual or perennial. Leaves flat. Spikelets in spikes, 2—-3 together at a joint 
of the rachis, sessile or short-stalked, often only | fertile in a cluster, 1-flowered, awned, 
laieral ones usually imperfect and short stalked; spikes terete; rachilla jointed above 
the glumes, that of the central spikelet extending beyond the palet and sometimes bearing 
a rudimentary second flower. Glumes setaceous to narrowly lanceolate, rigid, persist- 
eni. Lemma lanceolate, rounded on the back, obscurely 5-veined above, usually awned. 
Palet shorter than the lemma, 2-keeled. Stamens 3. Grain hairy at tip, grooved, 
adhe reni. (Latin name for barley.) 
A. Only the central spikelet of each group fertile. 
B. Lemma-awn of the central spikelet 3.5——6 cm. long, of the lateral spikelets over 
half the lemma. W. E. 
H, jubatum |. (Squirrel-tail Grass) 
BB. Lemma-awn of the central spikelet |1.8—3 cm. long, of the lateral spikelets 
ever half the lemma. 
C. Central spikelet plainly stalked, its glumes ciliate. W. E. 
H. murinum lL. (Wall Barley) 
CC. Central spikelet sessile, its glumes not ciliate. 
D. Blades and sheaths of leaves glabrous. W. E. 
H. caespitosum Scribn. 
DD. Blades and sheaths of leaves pilose. E. 
H. comosum Presl. 
BBB. Lemma-awn of the central spikelet 0.4—1.2 cm. long, of the lateral spike- 
lets not over half the lemma. 
E. Lateral spikelets with perfect flowers. E. 
H. boreale S. & 5S. 
EE. Lateral spikelets with neutral flowers. 
: F. All the glumes of each cluster tapering from the base. 
G. Leaf-blades finely pubescent; inner glumes of the lateral spikelets about 
twice as wide as the outer. U. 
H. gussoneanum Parl. 
