PLANTS COLLECTED BY DR. GAMBEL. 189 
*STENOCHLOA. 
Spikelets about three-flowered; flowers distichal, hermaphrodite. Glumes two, 
awnless, lanceolate, acute, much exceeding the spikelet in length. Palex two, 
awnless, the lower concave, ovate, nearly nerveless and pubescent; the upper 
bicarinate. Stamina three. Ovarium stipitate. Styles two. Stigmas plumose. 
Caryopsis free, oblong-lanceolate. 
S. *catirornica. A smooth, many-jointed, annual, small grass, without branches, about a foot high ; leaves 
linear and attenuated into long points; ligules membranaceous, small; panicle narrow with the small 
branches appressed. Glume green, and smooth, very long, extending beyond the included spikelet ; 
the lower valve lanceolate-linear, very acute, membranaceous on the margin, obscurely three-nerved ; 
the upper narrower, one-nerved ; paleze ovate, obtuse, the lower silky pubescent, — the 
upper with a nerve on either margin ; anthers whitish. 
Nearly allied to Poa, but with the glume almost of Danthonia; the palea also 
nerveless, not carinate, and without the arachnoid connecting pubescence at the base. 
Has. Island of Santa Catalina. Coast of California. 
*PLEOPOGON. 
Spikelets one-flowered. Glumes two, unequal, nearly as long as the flower; the 
lower with two awns, the upper entire, with one awn. Palez two, the lower oblong, 
with the apex produced into a short awn, the upper without awn, and two-nerved. 
Stamens three. Styles two. Stigmas pilose, slender. Culm compressed, somewhat 
branched; leaves linear, short and rigid; spikes terminal, simple, not jointed. 
P. *serosum. ‘Leaves very narrow and acuminated, rather rigid; ligules membranaceous, acuminated ; 
elumes somewhat membranaceous, the lower terminating with two longish scabrous awns, often rather 
unequal in length, the upper not cleft, terminating with a single awn; the lower palew rather 
lanceolate, purplish and somewhat oblique, entire, terminating in a shortish twisted awn; a line of 
pubescence along the sides of the glume; the upper glume membranaceous, two-nerved. 
A slender grass, about eighteen inches high, with a flattish jointed culm. Allied 
apparently to Lycurus, but the flowers are all hermaphrodite. 
Has. Mountains of Santa Fé, Mexico. 
