Puccinellia tenella

(Lange) Holmb. ex Porsild
Common names: Tundra alkali grass
Synonyms: Puccinellia tenella subsp. langeana Puccinellia langeana
Treatment appears in FNA Volume 24. Treatment on page 469.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; cespitose, not mat-forming. Culms 3-16 cm, erect. Ligules 0.5-1.7 mm, acute, obtuse, or truncate, entire; blades usually involute and 0.4-0.7 mm in diameter, occasionally flat and 0.5-1.5 mm wide. Panicles 1.6-5.5 cm, usually contracted, sometimes diffuse, lower branches erect or ascending, spikelets usually confined to the distal 1/2; pedicels smooth, with tumid epidermal-cells. Spikelets 3.5-7 mm, with 3-6 florets. Glumes slightly keeled over the back, veins distinct, apices acuminate to acute; lower glumes 0.7-1.3 mm; upper glumes 1.3-1.8 mm; calluses glabrous or with 5 or fewer hairs shorter than 0.1 mm; lemmas 2-2.5 mm, herbaceous, usually purple with whitish margins, smooth, glabrous or with a few hairs on the bases of the lateral-veins, backs rounded, 5-veined, veins distinct, not extending to the margins, apical margins smooth, apices obtuse to truncate, entire or slightly erose; palea veins smooth, glabrous; anthers 0.6-0.9 mm. 2n = 14.

Distribution

Maine, Mass., N.Y., Alaska, N.H., R.I., Vt., Conn., Greenland, Man., N.B., Nfld. and Labr., N.S., N.W.T., Nunavut, Ont., P.E.I., Que.

Discussion

Puccinellia tenella is a halophytic, circumpolar subarctic and low arctic species. It is found above the high tide zone on sandy spits, in salt marshes, in silty soils, and among granitic rocks to 30 m above sea level. The above description applies to P. tenella subsp. langeana (Berlin) Tzevlev, the only subspecies in the Flora region. Puccinellia alaskana Scribn. &; Merr., considered a subspecies of P. langeana (Berlin) T.J. Sørensen ex Hulten [= P. tenella] by Sørensen (1953), has acute lemmas and hairs on the palea. It is discussed under P. pumila (see p. 471).

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Puccinellia tenella"
membranous +  and scarious +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
erose +  and entire +
serrate to erose +  and entire +
Jerrold I. Davis +
(Lange) Holmb. ex Porsild +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
involute +, folded +  and flat +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
spikelike +
with 5 or fewerhairs +  and glabrous +
0.1 cm1 mm <br />0.001 m <br /> (?) +
Tundra alkali grass +
not branching +
geniculate +
3 cm30 mm <br />0.03 m <br /> (16 cm160 mm <br />0.16 m <br />) +
not woody +
Maine +, Mass. +, N.Y. +, Alaska +, N.H. +, R.I. +, Vt. +, Conn. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +  and Que. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 6 +
sterile +  and bisexual +
compressed +
reduced +
usually distinctly shorter +
subtending +
subequal +  and unequal +
membranous +
uncinate +
less +  and 1/3 +
(3)5(7)-veined +
with a few hairs +  and glabrous +
keeled +  and rounded +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +  and slightly or distinctly coriaceous +
erose +  and entire +
entire +  and truncate +
obtuse +  and acute +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
membranous +
inconspicuous +
lanceolate +
ascending +  and erect +
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 +
membranous +  and scarious +
spikelike +
1.6 cm16 mm <br />0.016 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
subterete +  and weakly laterally compressed +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Puccinellia tenella subsp. langeana +  and Puccinellia langeana +
Puccinellia tenella +
Puccinellia +
species +
membranous +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
obscure +  and prominent +
plant +, not mat-forming +  and cespitose +
aquatic +  and terrestrial +