94 F 
Hordeum maritimum With. Arrang., 172. This species is distinguished from ay 
H. nodosum by the broadened inner empty glume of the lateral spikelets, which zi 
are sometimes staminate and distinctly awned. The spikes are also shorter 1 
and proportionately thicker. A native of the seacoast of western and southern 
Europe. Found on the seashores and in sandy sterile soils from Washington 1 
to Lower California. - d 
Herdeum murinum Linn. Sp. Pl. 85. This species is at once distinguished by 
the ciliate, flattened, pete glumes of the central spikelets'of each cluster and 
the inner glumes of each of the lateral ze ts. Naturalized near the coast 
from British Columbia to Lower Californi 
Hordeum pusillum Nutt. Gen. 1, 87. (H. pet Steud. Syn. Pl. Gram 
m 
the middle flower. Arid and saline or alkaline soils from Idaho and Utah to 
Arizona and eastward to Louisiana, Missouri, Illinois, Virginia, and South 
Carolin 
Hordeum paced ns HBK. A rather PE erect, leafy annual (?) 2 to 3 feet $ 
high, with terminal bearded spikes 3 to 4 inches long. Culms terete, smooth, 1 
shining; nodes smooth, or the lower ones 1 puberulent; sheaths shorter 
than the internodes, the lower ones densely pubescent, the upper smooth, striate; 
eL 
rigid, 3 to 6 inches long, 2 to 3 lines wide, striate, scabrous, gradually narrowed 
to the pungently tipped apex. Axis of the spike compressed, scabrous or sub- 
eiliate on the margins, the joints about 1 line long. Empty glumes setaceous, 
rounded on the back, suleate on the inner face pl scabrous, those of the 
central spikelet ent 1 inch long, those of the lateral spikelets a little shorter; 
flowering glume of the central spikelet 44 to 5 lines long, lanceolate, smooth 
excepting near the apex, awned, awn 10 to 12 lines long, scabrous; palea about 
as long as the glume, scabrous on the keel above. Prolongation of the rachilla 
awn-like, and two-thirds as long as the palea. Lateral spikelets neutral, the : 
pedicellate third glume about 3 to 3} lines long, scabrous, subulate-pointed.— 
HBK., Nov. Gen. 1, 180. Distinguished from H. nodosum by its taller habit of 
8 attenuate and pungently pointed leaves, longer spikes and longer-awned 
glumes, the empty ones being flattened or sulcate on the inner face and not terete , 
throughout. Abundant along irrigation ditches near Glendale, Ariz. No. 2522 
C. R. Orcutt, April 30, 1896 
Hordeum nodosum Linn. Bis P1. 126 (1762). This is an annual or perennial grass, 
similar in habit to H. pusillum, but is usually more erect and taller, and the 
empty glumes are not at all flattened or dilated above the base. In the Rocky 
Mountain region from Arizona to Montana and westward to northern California 
e Washington, aad nepos y Alaska. 
& Smith, var. nov. Low, 4 to 10 inches high, 
with shorter pubescent ue which are rounded at the base, and inflated upper 
leaf sheaths; empty glumes 9 lines long; ferti than in 
the species, with an awn as long as itself. In habit resemblin H. maritimum, 
but with longer (1 to 2 inches) spikes, and with the details of spikelets those of stds 
H. nodosum. a 
. Hordeum gussoneanum Parl. Pl. Palerm. in obs., 244. Slender ascending annuals 6 2 
< to 10 inches high, with the habit of H. maritimum, but the inner empty glumes 
narrowly flattened instead of wing-margined along the inner side. California 
to Oregon. 
eum boreale Scribn. & Smith, sp. nov. A slender, -n an 
íga ——- 
pubescent, the upper smooth and striate; ligule very short, ecarions; leaf blades 
4 to 6 inches long, 2 to Se lines Eee saa long acuminate pointed, those 
