Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
63. Poaceae, the Grass Family
7. Catabrosa Beauv.
1. Catabrosa aquatica (L.) Beauv. -- Brookgrass
Loosely tufted or sprawling perennial 2-4 dm tall; culms thick but weak,
often prostrate, branching and rooting at the nodes in mud or water. Leaf
blades soft, flat, mostly less than 15 cm long, 3-8(15) mm wide, glabrous,
the tip acuminate, mucronate or obtuse; sheaths glabrous; ligule
scarious, elongate, 1-4 mm long. Panicle pyramidal or oblong, open, 10-20
cm long. Spikelets mostly 2-flowered or frequently mostly 1-flowered,
golden or brown, 2-4 mm long, disarticulating above the glumes; rachilla
joint elongate, the second floret (when present) well above the first; glumes
unequal to nearly equal, scarious and nerveless at the tip, 1-2 mm long, the
first smaller, ovate, the second broadest toward the tip, truncate and erose;
lemmas truncate and erose at the apex, 1.5-2.5 mm long, 3-nerved; palea
much like the lemma, 2-nerved; anthers 1-2 mm long. Grain brown,
ellipsoid, ca. 1.5 mm long. Jun--early Sep. Springs, streams and seepage areas,
where water is fresh; occasional, mostly in the n and w parts; (Newf. and Labr.
to Alta., s to WI, NE, CO, AZ, NV and WA; also Eurasia).
Previous Section -- Calamagrostis stricta (Timm)
Koel. -- Northern reedgrass
Return to Family -- Poaceae - The Grass
Next Section -- Cinna arundinacea L. -- Woodreed