Stuckenia vaginata

(Turczaninow) Holub

Folia Geobot. Phytotax. 19: 215. 1984.

Common names: Bigsheath-pondweed potamot engainé
Basionym: Potamogeton vaginatus Turczaninow Bull. Soc. Imp. Naturalistes Moscou 27(2): 66–67. 1854
Treatment appears in FNA Volume 22.

Stems freely branching proximally to distally, terete, 20–50 (–70) cm. Leaves: length and width of those on main-stem only slightly larger than those on branches; stipules with stipular sheaths inflated 3–5 times stem thickness, 2–9 cm, ligule absent, obscure, or to 0.2 mm; blade narrowly filiform to linear, 1–10 (–15) cm × 0.2–2.9 mm, apex rounded, obtuse, or slightly notched; veins 1 (–3). Inflorescences: peduncles terminal, erect, slender, 3–15 cm; spikes moniliform, 10–80 mm; verticels 3–12. Fruits brown, obliquely obovoid, 3–3.8 mm × 2–2.9 mm; beak inconspicuous. 2n = 78.


Phenology: Flowering late summer–fall.
Habitat: Deep lakes and ponds
Elevation: 0–2300 m

Distribution

V22 374-distribution-map.jpg

Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Idaho, Minn., Mont., N.Dak., Oreg., S.Dak., Utah, Wash., Wis., Wyo., Eurasia

Discussion

One hybrid, P. pectinatus × P. vaginatus (= P. × bottnicus Hagström), with this species as a putative parent has been described under the genus Potamogeton.

Lower Taxa

None.

"not elongating" is not a number.

... more about "Stuckenia vaginata"
notched +, obtuse +  and rounded +
Robert R. Haynes +  and C. Barre Hellquist +
(Turczaninow) Holub +
Potamogeton vaginatus +
inconspicuous +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
narrowly filiform;linear +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
Bigsheath-pondweed +  and potamot engainé +
Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Minn. +, Mont. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wis. +, Wyo. +  and Eurasia +
0–2300 m +
0.3 cm3 mm <br />0.003 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
obovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
Deep lakes and ponds +
axillary +  and terminal +
cylindric +  and capitate +
submersed +
acute +, turgid +  and channeled +
0 cm0 mm <br />0 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +
orthotropous +
not pedunculate +
not spiraling +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Flowering late summer–fall. +
short-stipitate +  and stipitate +
Folia Geobot. Phytotax. +
correll1970a +, harada1956a +, hellquist1988a +, hind1980a +, j1958b +, l1954a +, l1981b +, moore1913b +, palmgren1939a +, preston1995a +, stern1961b +  and taylor1968a +
auriculate +  and not auriculate +
not persisting +
inflated +
moniliform +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
epitepalous +
50 cm500 mm <br />0.5 m <br /> (70 cm700 mm <br />0.7 m <br />) +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
not tubular +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Coleogeton +
Stuckenia vaginata +
Stuckenia +
species +
caulescent +, not rhizomatous +  and rhizomatous +
annual +  and perennial +