' 



GRASS FAMILY. 



2. Eatonia Pennsylvanica (DC.) A. Gray. Pennsylvania 



(Fig. 442.) 



Koeleria Pennsylvanica DC. Cat. Hort. Monsp. 

 117. 1813. 



Eatonia Pennsylvanica A. Gray, Man. Ed. 2, 558. 

 1856. 



Usually glabrous, culms i-3 tall, erect, 

 simple, slender, smooth. Sheaths shorter than 

 the internodes; ligule ^ //r long; leaves 2%'-i' 

 long, i // -3 // wide, rough ; panicle 3 / -7 / in 

 length, contracted, often nodding, lax, its 

 branches i / -2^ / long; spikelets i^ // -i^' // 

 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, itf" 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 

 ently nearly that of the typical form. 



3. Eatonia nitida (Spreng. ) Nash. Slen- 

 der Eatonia. (Fig. 443.) 



Aira nitida Spreng. PI. Hal. Mant. i: 32. 1807. 



Eatonia Dudley i Vasey, ConlL BoL G<u- ti 116 



1886. 

 Eatonia nitida Nash, Bull. Torr. Club. 23 si i 1895. 



Glabrous, culms i-2 tall, erect, yery slender. 

 smooth. Sheaths shorter than the internodea, 

 generally pubescent; ligule V"'long; leaves '. 

 long, i" wide or less, often pubescent, the upper- 

 most very short; panicle 2'-6' in length, lax. the 

 branches spreading at flowering time, afterwards 

 erect, i'-2#' long; spikelets not cro* 

 long; empty scales smooth, the first about ooe- 

 third as wide as and equalling the second. * 

 is obtuse or almost truncate, often apkuUtc , 

 flowering scales narrow, i"-iV long, oblnM or 

 acutish, smooth. 



In dry woods, southern NVw York an-! 

 to Georgia ajid Alabama. May-June. 



67. KOELERIA Pers. Syn. i: 97. 1805. 

 Tufted annual or perennial grasses, with flat or setaceous feayes and moatl* spii 



like panicles. Spikelets 2 - 5 -flowered. Two lower scales empty, n 

 keeled, scarious on the margins; the flowering scales 3-5-nerve 

 2-keeled. Stamens 3. Styles very short Stigmas plumose, 

 scale and palet. [In honor of Georg Ludwig Koeler, German b< 



About 15 species of wide geographic distribution. The following, which may 

 forms, occurs in North America. 



