YELLOW-EYED GRASS FAMILY. 369 
1. Xyris flexudsa Muhl. Slender Yellow-eyed Grass. (Fig. 893.) 
AXyris flexuosa Muhl. Cat. 5. 18:3. 
Scapes slender, straight or sometimes slightly 
twisted, 4’-18’ tall, 2-edged above, bulbous-thickened 
at the base. Leaves narrowly linear, flat or becoming 
twisted when old, 1-6’ long, 4’’-1 4’ wide; head glo- 
bose, or short-oblong, obtuse, 3//-4’’ high; bracts 
broadly oval or slightly obovate; entire or somewhat 
lacerate at the apex; lateral sepals linear, about as long 
as the bracts, curved, finely fringed with short hairs 
on the wingless keel; expanded flowers 3’’-4’’ broad. 
In swamps and bogs, Maine to Minnesota, south to 
Georgia and Texas. July—Sept. 
2. Xyris montana H. Ries. Northern 
/\ a, ; 
nA Yellow-eyed Grass. (Fig. 894.) 
Y 
(7) BY Ayris flexuosa var. pusilla A. Gray, Man. Ed. 5, 548. 
ff 1867. Not \. pusilla R. Br. 1810. 
I\X/ / Ayris montana H. Ries, Bull. Torr. Club, 19: 38. 1892. 
Scapes very slender, straight or slightly twisted, 
2-edged above, 2/-12/ tall, not bulbous-thickened at 
the base. Leaves narrowly linear, 1/6’ long, 14’/-1/’ 
wide, not at all twisted or but very slightly so; head 
oblong or ovoid, subacute, 1%4’/-3/’ long; bracts oval 
or obovate, rounded and finely lacerate at the apex; 
lateral sepals linear, irregularly serrate-fimbriate on 
the winged keel aboye the middle, about as long as 
the bracts. 
2 
S In bogs, Nova Scotia to Ontario and Michigan, south 
On to the Pocono Mountains of Pennsylvania and to New 
\ 
Jersey. Our only species occurring on mountains. July— 
Aug. 
3. Xyris communis Kunth. Southern Yellow-eyed Grass. (Fig. 895.) 
Ayris communis Kunth, Enum, 4:12. 1843: 
Xyris difformis Chapm. FI. S. States, 500. 1860. 
Scapes slender, slightly twisted, 2-edged above, 
1-edged below, not thickened at the base, 6/’-18/ 
tall. Leaves linear or linear-lanceolate, flat, 3/—10’ 
long, 1/’-4’’ wide; head ovoid, or subglobose, blunt 
or subacute, about 14’ long; scales ovate or oval, 
mostly entire; lateral sepals lanceolate, the winged 
keel fimbriate from the apex to below the middle; 
corolla-lobes obovate, 2/’-3/’ long. 
In bogs, Maryland to Florida and Louisiana. Widely 
distributed in tropical America. June-Aug. 
