COI.ORADO Wked Seeds 
7 . Barley, Squirrel-tail Grass 
(Ilordeum L.) 
^ The lemma, obscurely 5-veiiied, tapers olf into a terminal awii from one 
to ten times the length of the seed ; seeds usually in groups of three in the 
: spikelet, the numerous awns, several long and some short, giving a brush-like 
, appearance; palet slightly shorter than the lemma, with two distinct veins 
I ]:ear the margin ; rachilla prolonged behind the palet as an awn one-half to 
three-fourths as long as the seed; seeds 5-8 mm. long, 1-2 mm. wide. 
; Key to Species 
f: Awns 8 to 10 times longer than seeds — central spikelet prominent 
i Awns 1 to 2ya times longer than seeds~all spikelets of nearly 
I- the same size 
1.. H. juhatum 
2.. H. pusilhim 
Squirrel-tail Grass (Hordcuni juhatum L.) (Fia. 
beeds buff to straw yellow in color; spikelets in clusters of three; only 
the central one fertile ; central seed 5-7 mm. long, 1-1.5 mm. wide. 
2. Little Barley (Hoj-dcum pusillum Nutt.) (Fig. 23). — Seeds pale, 
dull green yellow to straw yellow in color; spikelets in clusters of three; all 
fertile; seeds all the same size, 5-7 mm. long; .5-1 mm. wide. 
1 8. Beard Grass, Blue stem 
{Andropogon (Royen) L.) 
Spikelets distinctly awiied, the rachilla breaking off (articulating) below 
the glumes. The awn is dorsal (arising a noticeable distance below the apex 
ot the hyaline (transparent) lemma but above its base). Awns 15-30 mm 
long, as long or several times longer than the seed; palet and lemma are 
scale-hke; rachilla prominent, half as long as the seed, distinctly hairy alono 
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