Puccinellia vaginata

(Lange) Fernald & Weath.
Common names: Sheathed alkali grass Puccinellie engainée
Synonyms: Puccinellia vaginata var. paradoxa Puccinellia angustata var. vaginata
Treatment appears in FNA Volume 24. Treatment on page 477.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; cespitose, not mat-forming. Culms (6) 9-20 (35) cm, erect or decumbent. Leaves basally concentrated on small plants, distributed along the culms in larger plants; ligules 1-3 mm, acute, obtuse, or truncate, entire; blades 1-2 mm wide when flat, 0.5-1.6 mm in diameter when involute. Panicles (3) 6-12 (14) cm, diffuse or contracted and usually barely exserted from the sheaths at maturity, lower branches ascending to horizontal, spikelets usually confined to the distal 2/3; pedicels slightly scabrous, epidermal-cells tumid. Spikelets 4-8 mm, with (2) 4-5 (6) florets. Glumes rounded over the back, veins distinct or obscure, margins not inrolled, apices broadly acute or obtuse; lower glumes 1.3-2.1 mm; upper glumes 1.3-2.6 (3.4) mm; calluses with a few hairs; lemmas 2.8-4 mm, herbaceous, thin, often translucent, bases hairy, particularly on the veins, backs rounded, 5-veined, veins obscure, not extending to the margins, lateral margins usually not inrolled, apical margins uniformly and densely scabrous, apices broadly acute or obtuse, entire or slightly erose; palea veins glabrous proximally, scabrous distally; anthers 0.7-1.1 (1.2) mm. 2n = 56.

Distribution

Greenland, Nfld. and Labr. (Nfld.), Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska

Discussion

Puccinellia vaginata is a widespread North American arctic species. It is locally common in Greenland to about 78° N latitude; it is uncommon in Canada, where it is found primarily in the low arctic, rarely in the high arctic. One specimen is reported from eastern Siberia. It grows on coastal marine sediments and on eroding, raised marine sediments inland, and forms large tussocks near bird cliffs.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Puccinellia vaginata"
membranous +  and scarious +
1.2 cm12 mm <br />0.012 m <br /> (?) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
erose +  and entire +
serrate to erose +  and entire +
Obtuse (?) +  and Acute (?) +
Jerrold I. Davis +
(Lange) Fernald & Weath. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
not evident +
involute +, folded +  and flat +
1mm;2mm +
spikelike +
pubescent +  and glabrous +
Sheathed alkali grass +  and Puccinellie engainée +
not branching +
decumbent +  and erect +
geniculate +
9 cm90 mm <br />0.09 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not woody +
Greenland +, Nfld. and Labr. (Nfld.) +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +  and Alaska +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 5 +
sterile +  and bisexual +
compressed +
reduced +
usually distinctly shorter +
subtending +
rounded +
subequal +  and unequal +
membranous +
uncinate +
less +  and 1/3 +
distributed +
(3)5(7)-veined +
restricted +, pubescent +  and glabrous +
keeled +  and rounded +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +  and slightly or distinctly coriaceous +
erose +  and entire +
entire +  and truncate +
obtuse +  and acute +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
inconspicuous +
lanceolate +
ascending +  and horizontal +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
subequal +
membranous +  and scarious +
3 cm30 mm <br />0.03 m <br /> (?) +
spikelike +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 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 +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Puccinellia vaginata var. paradoxa +  and Puccinellia angustata var. vaginata +
Puccinellia vaginata +
Puccinellia +
species +
membranous +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
plant +, not mat-forming +  and cespitose +
aquatic +  and terrestrial +