608 CLXI. GRAMINE. Ari. 
2. HOLCUS. ‘ 
Spikelets 2-flowered ; glumes herbaceous, boat-shaped, mucronate ; 
flowers pedicellate, the lower one perfect and awnless, upper one ¢' 
or neuter, awned on the back. 
H. tanatus. Soft Grass. 
Hoary pubescent; st. 13—2f high; lvs. lanceolate, 2—5’ long; sheaths ~ 
striate ; panicle oblong, dense, whitish with a purple tinge; ls. shorter than the 
glumes,; sterile one with a recurved, included awn.—2| Common in wet mea- 
dows, N. Eng.! Mid. and W. States. Very soft with whitish down. Jl. 
26. HIEROCHLOA. Gmel. 
Spikelets 3-flowered; glumes 2, scarious; lateral flowers stami- 
nate, triandrous ; central flower %, diandrous (rarely triandrous). 
1. H. Boredtis. Roem. & Schultz. Seneca Grass. 
Smooth, glossy; st. simple, erect, 15—20’ high; radical lws. as long as the 
stem, cauline 2—4’ long, lanceolate, mucronate; panicle rather 1-sided and 
spreading, pyramidal, few-flowered, 2—3’ long; branchlets flexuous; spikelets 
broad, subcordate, colored, unarmed; lower palea ciliate—2 Wet meadows, 
Virg. to Arc. Am. Very fragrant. May. 
2. H. aupina. Roem. & Schultz. . 
Smooth ; st. erect, stout, 6—8’ high; lvs. linear-lanceolate, acute; sheaths 
tumid, longer than the internodes ; panicle ovoid, 14—2/ long, with the branches 
in pairs; spikelets purple, compressed, large, longer than the branches; glwmes 
lanceolate; lower fl. with an awn about as long as the palee.—2 Summits of 
the White Mts., Bigelow. Jn. 
27. ANTHOXANTHUM. 
Gr. avSos, a flower, favSos, yellow; from the color of its spikes. 
Spikelets 3-flowered, the central one %, the 2 lateral ones neuter, 
each consisting of one bearded palea; glumes 2, unequal, the upper 
one larger, enclosing the flowers; palez of the % 2, short, awnless ; 
stamens 2. 
A. oporitum. Sweet-scented Vernal Grass. 
St. slender, erect, 10—18' high; dvs. short, striate, pale green; panicle 
spicate, oblong-ovoid; spikelets pubescent, on short peduncles; palee@ of the 
lateral fis. linear-oblong, ciliate on the margin, one of them with a bent awn 
from near the base, the other with astraight awn from the back near the 
summit.—An early-flowering, deliciously fragrant grass, in most of the States, 
andCan. May, June. § 
Trize 6. AVENEZ.—Inflorescence paniculate. Spikelets solitary, few- 
flowered. Glumes and palee of similar texture. Upper flowers generally 
pedicellate, with awn-like processes or abortive rudiments between the upper 
and the lower ones. Upper palea wtth two keels. | ; 
28. AIRA. 
Gr. atoa, a deadly weapon; originally applied to a poisonous plant. 
Spikelets 2-flowered, without abortive rudiments; glumes 2, 
membranaceous and shining, subequal; one of the flowers pedicel- 
late ; palese subequal, pilose at base, the lower one lacerate at apex 
and awned on the back. 
1. A FLEXUOSA. 
St. smooth, 1—2f high, nearly naked; lvs. setaceous; smooth, with striate 
sheaths and truncate stipules; panicle loose, spreading, trichotomous, with long, 
flexuous branches; awns geniculate, longer than the palez.—% Vales and hills, 
U.S. and Brit. Am.,common. An erect, elegant grass, growing in tufts. Jn. 
