Catabrosa aquatica

(L.) P. Beauv.
Common names: Brookgrass Water whorlgrass Catabrosa aquatique
Synonyms: Catabrosa aquatica var. laurentiana
Treatment appears in FNA Volume 24. Treatment on page 610.

Plants often stoloniferous. Culms 10-60 cm, glabrous. Sheaths glabrous; ligules 1-8 mm, acute to truncate, erose to subentire; blades (1) 3-15 (20) cm long, 2-13 mm wide. Panicles 3-35 cm long, (1) 2-10 (12) cm wide; nodes distant, with 3 to many, often very unequal branches. Spikelets 1.5-3.5 (4) mm, terete to somewhat dorsiventrally compressed, lowest floret sessile, second floret on an elongate internode; rachilla internodes 0.75-1.5 mm. Lower glumes 0.7-1.3 mm, often not reaching the base of the distal floret; upper glumes 1.2-2.2 mm; lemmas 2-3 mm; anthers 2-3 mm. 2n = 20, 30.

Distribution

Ariz., Colo., N.Mex., Wash., Wyo., Utah, Alaska, Wis., Iowa, N.Dak., Nebr., Oreg., S.Dak., Mont., Nev., Alta., B.C., Greenland, Man., N.B., Nfld. and Labr., Ont., P.E.I., Que., Sask., Idaho

Discussion

Catabrosa aquatica grows in wet meadows and the margins of streams, ponds, and lakes in the Flora region, Argentina, Chile, Europe, and Asia. It is listed as endangered in Wisconsin. Although palatable, it is never sufficiently abundant to be important as a forage species. The species is regarded here as being variable, but having no infraspecific taxa.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Catabrosa aquatica"
membranous +  and scarious +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rounded to truncate +, rounded +  and truncate +
scarious +
Mary E. Barkworth +
(L.) P. Beauv. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
not evident +
cross +, linear +  and narrowly lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
spikelike +
unequal +
1 cm10 mm <br />0.01 m <br /> (?) +
Brookgrass +, Water whorlgrass +  and Catabrosa aquatique +
ascending +  and erect +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
Ariz. +, Colo. +, N.Mex. +, Wash. +, Wyo. +, Utah +, Alaska +, Wis. +, Iowa +, N.Dak. +, Nebr. +, Oreg. +, S.Dak. +, Mont. +, Nev. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, Ont. +, P.E.I. +, Que. +, Sask. +  and Idaho +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
unequal +
uncinate +
lanceolate +  and ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
subentire +  and acute to truncate +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
membranous +
inconspicuous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
subequal +
3cm +  and 35cm +
spikelike +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dry +  and fleshy +
with reduced florets +  and empty +
1 +  and 60 +
compressed +  and terete to somewhat +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Catabrosa aquatica var. laurentiana +
Catabrosa aquatica +
Catabrosa +
species +
membranous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
parallel +  and converging +
rounded +
aquatic +  and terrestrial +