Seed Study - Koeleria macrantha

Koeleria macrantha (Koeleria pyramidata) - Prairie Junegrass
Koeleria macrantha (Koeleria pyramidata) - Prairie Junegrass

NPS Graphic

Species: Koeleria macrantha (Koeleria pyramidata)
Common name: prairie junegrass

Vegetative identification: The leaf is folded in bud. The stiff blades are hairy with short hairs dorsally and ventrally and longer hairs on the margins. Blades are distinctly ribbed dorsally and tips are canoe-shaped like those of Poa. Blade margins are lightly toothed and have a narrow white band. The collar has a hairy margin, is divided and usually is greenish white. Sheath is distinctly veined and light green or occasionally reddish. This conspicuously dark green grass starts growing early in the spring and has a semi-decumbent growth pattern.


Koeleria macrantha – prairie junegrass
Average number of good seeds per gram bulk matter: n.m.
Average number of good seeds per gram cleaned: n.m.
Commercial estimates of seeds per gram: 7361
Percent seed: 20.8
Percent live: n.m.
Collection dates: July 13, 14 and 21
Collection effort: n.a.
Collection notes: Even though this species is fairly common in the Park we had a lot of problems collecting and cleaning it. Seed was collected from many different areas in the Park. The few references we could find told us that our collection date for this species was timely, however most of the seed was very soft and much of it was covered with a black sooty looking material. Plus, many samples had tiny flies on them that could only be seen with the aid of a microscope. After spending quite a bit of time collecting, cleaning and doing seed counts we ended up not planting it, because we feared it would not be viable.
Cleaning notes: n.a.

Last updated: January 23, 2018

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