Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
63. Poaceae, the Grass Family
18. Muhlenbergia Schreb. -- Muhly
4. Muhlenbergia racemosa (Trin.) Rydb. -- Marsh muhly, green muhly
Similar to M. glomerata but often more robust, 3-10 dm tall; culms
erect to decumbent, unbranched or more commonly branched from the middle nodes;
internodes smooth and shiny, sometimes puberulent-roughened near the summit.
Leaves flat, 3-17 cm long, 2-5 mm wide; sheaths glabrous, the
ligule truncate, erose-ciliate, 0.6-1.5 mm long. Panicle contracted and
often lobed, sometimes interrupted in the lower portion, 3-13 cm long, 3-12
mm thick. Spikelets crowded and appressed in oblong to obovoid glomerules,
green or purplish; glumes subequal, subulate to an awned tip, the bodies
1.5-3 mm long, the awns 1.5-3.5 mm long, both glumes (including the awns) much
surpassing the floret; lemma lanceolate, 2.5-3.8 mm long, tapered to
a sharp or minutely awned tip, pilose on the lower 1/2 and on the callus; anthers
0.5-0.8 mm long. Grain brown, oblong, 1.5-2 mm long. Late Jul--Sep(Oct).
Wet meadows, shores, stream banks and also in disturbed upland habitats, often
where shady; common; (Ont. to Alta. and WA, s to IN, IL, MO, OK, NM and NV).
Previous Section -- Muhlenbergia mexicana (L.)
Trin. -- Wirestem muhly
Return to Family -- Poaceae - The Grass
Next Section -- Muhlenbergia richardsonis (Trin.)
Rydb. -- Mat muhly