y 23 
nitidum var. villosum. 
m 
pubescens Michx. 
acuminatum Schlecht. 
b schlechtendalii Kltzh. 
striatum (W.). 
enslini Trin. ? 
rafinesquianum Schult .. ipie Schultes. 
f setaceum Muhlbg. 
Le sa ertum Muhlbg. 
f walte oir. 
lse 'oparium Michx. fide Willdenow. 
5 Michx. 
milioides Lam. et N. ab Es. 
nitidum Lam 
ramulosum Mich 
latifolium . lx 
hians Ell 
eee Muhlbg.. ensifolium Ell 
ston’ Seamed rostratum (W.). ¿0 yyO 
vir pics pede à coloratum in the Willdenow Herbarium. i ¿PL 9 4 
e: Ht 
5 v1 Awe, 
V. NATIVE AND INTRODUCED SPECIES OF THE GENERA 
HORDEUM AND AGROPYRON. 
By F. LAMSON-SCRIBNER and JARED G. SMITH. 
a HORDEUM. 
Analytical key to the species. 
1. Lateral spikelets sessile; P iis eultivated for the grain ............ H. vulgare. 
l tA Laboral ATG EI ˙ AAA 58 2 
2. Floret of the central mas sessile Ru EET 
2. F “be OL tke central d Ree sc. oo ͥ Ä AR 9 
3. Empty glumes all alike, oue ISI AA S ape oce PRI AS BE 4 
3. Empty glumes not all su T 
4. Empty glumes 1 to 2} inches long; lateral florets long-awned....... H. jubatum. 
4. Empty i less than 1 inch ong; lateral florets “merely subulate-pointed, 
5. Lateral ee flower-bearing E, sprees 
5. Lateral spikelets neutral 
6. Leaves pungent-pointed ; Hoe glume of the central spikelet 44 to x lines 
> long, its awn 10 to 12 lines 1 cendens. 
6. Floweria gam of the en dele 3 to 4 lines long; ifs awn shout the 
cnp ono nnns 3 H. nodosum. 
E 7. Empty gu of the middle spikelet lanceolate H. pusillum. 
| 7. Empty glumes of the middle spikelet setaceous......--..-..----.----.-------- 8 
: 8. Inner empty glumes of the lateral spikelets obliquely 8 -—— line 
J! mp 88 timum. 
1 8, gere sop glumes of the lateral spikelets slightly fiattened, one-fourth line 
H. gussoneanum. 
9. Empty glumes of the central spikelet 2 the inner ones of the lateral paras 
ciliate along the margins with spreading hairs urinum. | 
9. Empty glumes not cili: ate Hin 
Hordeum jubatum Linn. Sp. PL 85. In the West this grass causes much loss — — 
of stock on account = the injury the b ed joints of the spike canse to the — 
month and throat of animals eating it in pastures or in hay, Common g 
. the coast t and in nn el meadows of the interior. 
