Glyceria septentrionalis var. septentrionalis

Treatment appears in FNA Volume 24. Treatment on page 83.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Ligules 5-10 mm; blades 2-15 mm wide. Panicle branches 3-17 cm, with 1-9 spikelets. Rachilla internodes 1.1-1.8 mm. Lemmas scabrous over the veins, prickles about 0.05 mm, scabrous or scabridulous between the veins, apices almost truncate to obtuse or acute, apical margins crenate to entire. 2n = 40.

Discussion

Glyceria septentrionalis var. septentrionalis grows throughout the range of the species, but is less common in the lower floodplain of the Mississippi River and Kentucky than var. arkansana. It is found in shallow water or wet soils. In reviewing specimens for this treatment, some were found to have acute lemmas that usually exceeded the paleas, and lemma midveins that were clearly longer than the other veins; others had truncate to obtuse lemmas that were usually shorter than or equaling the paleas, and lemma midveins that were barely longer than the lateral veins. Further study is needed to determine whether the two kinds merit separate recognition.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Mary E. Barkworth +  and Laurel K. Anderton +
Hitchc. +
1 (?) +  and 3 (?) +
basal +  and apical +
keeled +  and rounded +
pseudopetiolate +  and branching +
persistent +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
18 cm180 mm <br />0.18 m <br /> (32 cm320 mm <br />0.32 m <br />) +
folded +  and flat +
2mm;15mm +
spreading;usually erect;strongly ascending +
0cm;20cm +
73 cm730 mm <br />0.73 m <br /> (182 cm1,820 mm <br />1.82 m <br />) +
decumbent +  and erect +
20 cm200 mm <br />0.2 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
not woody +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Conn. +, N.J. +, N.Y. +, Va. +, W.Va. +, Del. +, D.C. +, Wis. +, Ont. +, Que. +, Fla. +, N.H. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Mass. +, Maine +, R.I. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Okla. +, Md. +, Ohio +, Mo. +, Minn. +, Mich. +, Miss. +  and Ky. +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
8 +  and 16 +
compressed +
reduced +
shorter than to longer than the adjacent lemmas +
subtending +
elliptic +  and obovate +
much smaller +
scarious +  and membranous +
5-11-veined +
uncinate +
hispidulous +  and scabrous +
hairy +, glabrous +, scabrous +  and smooth +
rounded +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
membranous +  and thinly coriaceous +
lacerate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
inconspicuous +
lanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
reduced +
3 cm30 mm <br />0.03 m <br /> (17 cm170 mm <br />0.17 m <br />) +
15cm +  and 60cm +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
dry +  and fleshy +
scabridulous +  and smooth +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
rectangular +, terete +  and cylindrical +
0.25 cm2.5 mm <br />0.0025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1mm +  and 3mm +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Panicularia septentrionalis +
Glyceria septentrionalis var. septentrionalis +
Glyceria septentrionalis +
variety +
notched +, rounded +  and truncate +
membranous +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
prominent +  and evident +
hispidulous +  and scabrous +
aquatic +  and terrestrial +