Glyceria nubigena

W.A. Anderson
Common names: Great smoky mountain mannagrass Great smoky mountain glyceria
Endemic
Treatment appears in FNA Volume 24. Treatment on page 75.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial. Culms 100-200 cm tall, 3-5 mm thick, smooth. Sheaths smooth or scabridulous, weakly keeled; ligules 1-1.5 mm, truncate; blades to 45 cm long, 6-10 mm wide, abaxial surfaces smooth or scabrous, adaxial surfaces scabrous. Panicles 20-30 cm long, 7.5-14 cm wide, open, pyramidal; branches 7.5-14 cm, spreading or reflexed, lax, with 16-80 spikelets; pedicels 2-7 mm. Spikelets 3.5-5.5 mm long, 2-3 (3.5) mm wide, laterally compressed, oval in side view, with 3-5 florets. Glumes tapering from below midlength to the narrowly (less than 45°) acute apices, veins not extending to the apices; lower glumes 0.8-1.5 mm; upper glumes 1.8-2.2 mm; rachilla internodes about 0.5 mm; lemmas 2.2-2.7 mm, 0.9-1.1 mm wide in dorsal view, veins distinctly raised, usually smooth over and between the veins, sometimes scabridulous over the veins, apices acute, prow-shaped; paleas slightly shorter than the lemmas, lengths 2-2.7 times widths, keels not winged, tips incurved, apices narrowly notched between the keels; anthers 2, about 1.5 mm, dehiscent at maturity. Caryopses about 1.5 mm. 2n = 40.

Discussion

Glyceria nubigena is known only from moist areas of balds and high ridges in the Great Smoky Mountains of North Carolina and Tennessee.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Glyceria nubigena"
membranous +  and scarious +
1.5 cm15 mm <br />0.015 m <br /> (?) +
entire +  and truncate +
notched +, prow--shaped +  and acute +
Mary E. Barkworth +  and Laurel K. Anderton +
W.A. Anderson +
1 (?) +  and 3 (?) +
basal +  and apical +
keeled +  and rounded +
pseudopetiolate +  and branching +
persistent +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0 cm0 mm <br />0 m <br /> (45 cm450 mm <br />0.45 m <br />) +
folded +  and flat +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
reflexed;spreading +
7.5 cm75 mm <br />0.075 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Great smoky mountain mannagrass +  and Great smoky mountain glyceria +
not cormous +  and rooting +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
decumbent +  and erect +
20 cm200 mm <br />0.2 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
not woody +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Tenn. +  and N.C. +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
3 +  and 5 +
compressed +
reduced +
shorter than to longer than the adjacent lemmas +
subtending +
tapering +
much smaller +
scarious +  and membranous +
5-11-veined +
uncinate +
hairy +, glabrous +, scabrous +  and smooth +
prow--shaped +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
membranous +  and thinly coriaceous +
0.9mm +  and 1.1mm +
lacerate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
inconspicuous +
lanceolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
slightly longer +
reduced +
20cm +  and 30cm +
pyramidal +
7.5 cm75 mm <br />0.075 m <br /> (14 cm140 mm <br />0.14 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
dry +  and fleshy +
scabridulous +  and smooth +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
16 +  and 80 +
oval +  and compressed +
0.25 cm2.5 mm <br />0.0025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
2mm +  and 3mm +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Glyceria nubigena +
Glyceria sect. Striatae +
species +
membranous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
scabridulous +
aquatic +  and terrestrial +