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443 
GENUS 23. KCELERIA. Persoon. 
[Iii honor of M. K<>u!er, a German botanist.] 
Spikelets three to seven-flowered, in a dense narrow spike-like panicle; 
glumes and lower palea membranaceous, compressed keeled barely acute, 
or the latter often mucron tte or bristle-pointed just below the tip ; sta* 
mens three; styles very short. 
64. Kceleria Cristata. Persoon. 
Syn. —K. nitida, Nutt. 
Panicle narrowly spiked, interrupted at the base ; spikelets two to four- 
flowered ; lower palea acute, often mucronate-pointed ; leaves flat, the 
lower often sparingly hairy or ciliate. Perennial ; flowers in July. Culms 
20 to 30 inches high. Dry, gravelly places. Wisconsin, Illinois, Mich¬ 
igan, Iowa and Minnesota. 
GENUS 24. REBOULEA. Kunth. 
Spikelets usually two-flowered, in a contracted, slender panicle; glumes 
about equal in length, but very dissimilar, rather shorter than the 
flowers ; the lower narrowly linear, keeled, one-nerved ; the upper obo- 
vate, three-nerved ; lower palea oblong, obtuse, boat-shaped, naked, 
chartaceous, minutely roughened, at least when old; stamens three; 
grain linear-oblong, grooveless. 
65. Reboulea Pennsylvania. Gray . 
Syn. —Kceleria Pennsylvanica, DC. Aira mollis, Muhl. 
Panicle long and slender, rather loose ; upper glume obovate, barely 
obtuse, often slightly mucrouate ; the flowers lanceolate. Perennial ; 
flowers in June and July. Culms 2 feet high. Moist meadows. Illinois, 
Ohio, Michigan, and about Lake Superior. 
5G. Reboulea Obtusata. Gray. 
Syn. —Aira obtusata, Michx. A. truncata, Muhl. Koeleria truncata, 
Torr. Ilolcus striatus, Lin. 
Panicle dense and contracted, somewhat interrupted, the spikelets 
much crowded on the short erect branches ; upper glume rounded-obo¬ 
vate, truncate-obtuse, rough on the back ; the flowers lanceolate-oblong. 
Perennial ; flowers in June. Culms 2 to 3 feet high. Dry soil. Wis¬ 
consin, Illinois, Ohio, and about Lake Superior. 
