DESCRIPTIONS OF SPECIES. ol 
segment tapering to the apex, the aborted floret usually minute, but sometimes con- 
spicuous and nearly equal to the rachilla segment; grain about 2 mm. long, robust, 
light brown, slightly keeled and grooved, semitranslucent. (Fig. 13.) 
This is a European species not found in the American market. 
Panicularia spp. 
Owing to the fact that Panicularia nervata is sometimes sold as fowl 
meadow grass, a description of its seed is presented. A description 
of the closely allied P. americana, which is often associated with 
P. nervata, is added as an aid in comparing the two species. 
Panicularia nervata (Willd.) Kuntze. 
NERVED MANNA GRASS, SOMETIMES CALLED FOWL MEADOW GRASS. 
Florets 1-13 mm. long, robust, ovate (obovate with reference to the plant), light 
brown, purplish and sometimes greenish when immature; glume rounded at the 
back, prominently seven-veined, its margins 
somewhat infolded at the base and not flaring at 
the apex, which is sometimes narrowly hyaline; 
surface smooth, except the veins, which are 
sometimes scabrous; palea equal to or sometimes 
longer than the glume, broad, the keels exposed, 
prominent and nearly meeting at the rounded 
and sometimes slightly notched apex, usually F!¢. 14.—Seeds of nerved manna grass 
scabrous above the middle; rachilla segment one- ot sae Rei Gand by pacleaia 
fifth to one-fourth the length of the glume, sub- er 
cylindrical and scarcely expanded at the apex, the terminal one somewhat longer 
than the others and tipped by a minute, aborted floret; grain loosely held by the 
stifish glume and palea, obovate, slightly flattened, }-1 mm. long, smooth, some- 
what polished, very dark brown or black, sometimes slightly translucent. (Fig. 14.) 
Panicularia americana (Torr.) MacM. 
REED MEADOW GRASS, WATER MEADOW GRASS, TALL MANNA GRASS. 
Florets 3-33 mm. long, elliptical-oblong as viewed from the front or back, some- 
what spindle-shaped as viewed from the side, obtuse at the apex, brown, or purplish 
before complete maturi- 
ty; glume rounded at the 
back, distinctly seven- 
veined, its margins nar- 
rowly infolded at the 
base and not flaring at 
the apex; surface smooth 
Ry between the scabrous 
d a veins; palea equal to the 
"glume, concaye, its keels 
exposed, nearly meeting 
Fic. 15.—Seeds of water meadow grass (Panicularia americana): a,b, at the apex, very finely 
and ¢, back, side, and front views of seeds: d, grain. x : 
hispid-ciliate; rachilla 
segment one-fifth to one-fourth the length of the glume, subcylindrical, somewhat 
expanded at the apex, that of the terminal floret slightly longer and tipped by a 
minute, aborted floret; grain broadly oblong, 13-2 mm. long, somewhat flattened, 
very dark brown, slightly translucent, smooth, and somewhat polished when fully 
developed. (Fig. 15.) 
