278 
OHIO BIOLOGICAL SURVEY 
nin,^- rhizome. Panicle dense, contracted, with erect branches; 
s])ikelets v3-7-rtowered, appressed ; lemma narrow, acute, 7-nerved, 
In wet woods. August, September. Ashtabula, Cuyahoga, Sum¬ 
mit, Erie, Fairfield. 
5. Panicularia nervata (Willd.) Ktz. Nerved Manna-grass. A 
grass with erect, sim])le, slender stems, l-v3 ft. high, often in large 
clumi)s, with an expanded nodding panicle, the capillary branches 
drooping. Spikelets 3-7-tiowered, purplish; lemma obtuse or rounded, 
with 7 shar]), distinct nerves. 
In wet places. June-August. General. 
6. Panicularia grandis (Wats.) Nash. Tall Manna-grass. A 
grass with stout erect clustered stems, 3-5 ft. high, and a very com¬ 
pound loose and open ])anicle, nodding at the summit. Spikelets 
4-7-dowered with purple flowering glumes and whitish empty glumes; 
lemma 7-nerved, obtuse or rounded at the apex. 
In wet soil and ditches. June-August. Stark, Wayne. 
7. Panicularia pallida (Torr.j Ktz. Pale Manna-grass. A grass 
with pale green slender stems, 1-3 ft. high, ascending from a creeping 
base. Panicle lax, few-flowered ; spikelets 4-8-flowered, pale green; 
lemma 7-nerved, truncate and denticulate at the apex. 
In shallow water. Jnly, August. Trumbull County. (Ottawa 
County—Moseley Herbarium) 
5. Poa L. Blue-grass, Meadow-grass, Spear-grass. 
Perennial or annual grasses with flat or convolute leaves ending 
in a cucullate tip, and with terminal panicles. Spikelets 2-6-flowered, 
compressed; empty glumes keeled, 1-3-nerved; flowering glumes 
longer than the empty ones, commonly with a tuft of cobwebby 
hairs at the base, 5-nerved; palets 2-nerved or 2-keeled, 2-toothed 
at the apex; styles short, stigmas plumose; grain free or sometimes 
adherent to the palet. 
1. Flowering glumes not with webby hairs at the base, naked or with short 
hairs. 2 
1. Flowering glumes with webby hairs at the base; stems tufted. 4 
2. Stems much flattened, not tufted; rhizome long and creeping; lemma ob¬ 
scurely 3-nerved. P. cornpressa. 
2. Stems little or not at all flattened, tufted; lemma 5-nerved. 3 
3. Lemma with the midnerve silky-pubescent for ^ its length; perennials 
P. antumnaUs. 
3. Lemma with the midnerve pilose below; annuals. P. annua. 
4. Lemma glabrous; stems distinctly compressed; perennial. P. debilis. 
4. Lemma somewhat pubescent above the basal webby hairs; stems round or 
only slightly compressed. 5 
5. Lateral nerves of the lemma glabrous. 0 
5. Lateral nerves of the lemma pubescent. 7 
6. Plant yellowish green; lemma less than % in. long. 
6. Plant green; lemma more than in. long. 
P. trivia Its. 
P. alsodes. 
