a 
GRASS FAMILY. 193 
2. Eatonia Pennsylvanica (DC.) A. Gray. Pennsylvania Eatonia. 
(Fig. 442.) 
Koeleria Pennsylvanica DC. Cat. Hort. Monsp. 
117. 1813. 
Eatonia Pennsylvanica A. Gray, Man. Ed. 2, 558. , 
1856. 
Usually glabrous, culms 1°-3° tall, erect, 
simple, slender, smooth. Sheaths shorter than 
the internodes; ligule 34’” long; leaves 214’—7’ 
long, 1/’-3’/’ wide, rough; panicle 3/-7’ in 
length, contracted, often nodding, lax, its 
branches 1/-2'%4’ long; spikelets 114//-13//’ 
long, usually numerous, somewhat crowded 
and appressed to the branches; empty scales 
unequal, the first narrow, shorter than and 
about one-sixth as broad as the obtuse or ab- 
ruptly acute second one, which is smooth, or 
somewhat rough on the keel; flowering scales 
narrow, acute, 114’ long. 
In hilly woods or moist soil, New Brunswick to 
British Columbia, south to Georgia, Louisiana and 
Texas. June-July. 
Eatonia Pennsylvanica major Torr.; A. Gray, Man. Ed. 2, 558. 1856. 
Culms taller; panicle longer and more compound; leaves longer and broader. Range appar-. 
ently nearly that of the typical form. 
3. Eatonia nitida (Spreng.) Nash. Slen- 
der Katonia. (Fig. 443.) 
Aira nitida Spreng. Fl. Hal. Mant. 1: 32. 1807. 
Eatonia Dudleyi Vasey, Coult. Bot. Gaz. 11: 116. 
1886. 
Eatonia nitida Nash, Bull. Torr. Club, 22: 511. 1895. 
Glabrous, culms 1°-2° tall, erect, very slender, 
smooth. Sheaths shorter than the internodes, 
generally pubescent; ligule 1/’’ long; leaves 14/-3/ 
long, 1’ wide or less, often pubescent, the upper- 
most very short; panicle 2’-6/ in length, lax, the 
branches spreading at flowering time, afterwards 
erect, 1/-214’ long; spikelets not crowded, 114/’ 
long; empty scales smooth, the first about one- 
third as wide as and equalling the second, which 
is obtuse or almost truncate, often apiculate ; 
flowering scales narrow, 1//-14’’ long, obtuse or 
acutish, smooth. 
In dry woods, southern New York and New Jersey 
to Georgia and Alabama. May-June. 
67. KOELERIA Pers. Syn. I: 97. 1805. 
Tufted annual or perennial grasses, with flat or setaceous leaves and mostly spike- 
like panicles. Spikelets 2-5-flowered. Two lower scales empty, narrow, acute, unequal, 
keeled, scarious on the margins; the flowering scales 3-5-nerved. Palet hyaline, acute, 
2-keeled. Stamens 3. Styles very short. Stigmas plumose. Grain free, enclosed in the 
scale and palet. [In honor of Georg Ludwig Koeler, German botanist. ] 
About 15 species of wide geographic distribution. The following, which may contain two 
forms, occurs in North America. 
