Associations
provided by BioImages, the virtual fieldguide, UK
Plant / resting place / among
subaquatic cocoon of Macroplea appendiculata may be found among Potamogeton pectinatus
Foodplant / feeds on
larva of Macroplea mutica feeds on root of Potamogeton pectinatus
Remarks: Other: uncertain
Comments
provided by eFloras
No specimens have been seen from Delaware, but the species is to be expected there.
The sago-pondweed is among the most important species as food for waterfowl (E. Moore 1913). The species reproduces vegetatively by underground tubers and is spread by various duck species, especially canvas backs. In a study of food for ducks, a population of canvas backs was observed feeding in aquatic vegetation comprised of several genera, including sago-pondweed. When the stomach contents were examined, they were found to contain essentially 100% tubers of sago-pondweed (E. Moore 1913).
Two hybrids with this species as a putative parent have been described under the genus Potamogeton. These are P. pectinatus ´ P. vaginatus (= P. ´ bottnicus Hagström) and P. filiformis ´ P. pectinatus (= P. ´ suecicus K. Richter).
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Stems branched, especially distally, terete to slightly compressed, to 75 cm. Leaves: those of main stem only slightly larger than those of branches; stipules with stipular sheaths not inflated, 0.8--1.1 cm, ligule 0.8 mm; blade linear, 5.6--9.2 cm ´ 0.2--1 mm, apex acute to mucronate or apiculate; veins 1--3. Inflorescences: peduncles terminal or axillary, erect to ascending, cylindric, 4.5--11.4 cm; spikes moniliform to cylindric, 14--22 mm; verticels 3--5. Fruits yellow-brown to brown, oblanceoloid, 3.8--4 ´ 2.5--3.1 mm; beak toward abaxial margin, erect, 0.5--1.1 mm. 2n = 78.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
provided by eFloras
St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon; Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Fla., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Mexico; Central America; South America; Eurasia; Australia.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Flowering/Fruiting
provided by eFloras
Flowering summer--fall.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
provided by eFloras
Brackish to alkaline waters of lakes, streams, rivers, and estuaries; 0--2400m.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Potamogeton pectinatus Linnaeus, Sp. Pl. 1: 127. 1753 (as pectinatum)
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Comprehensive Description
provided by North American Flora
Potamogeton pectinatus L. Sp. PI. 127. 1753
Potamogeton angustissimus H.B.K. Nov. Gen. & Sp. 1 : 370. 1815. Potamogeton pectinatus scoparius Wallr. Sched. Crit. 68. 1822.
Stem slender, much branched ; leaves all submerged, capillary, often fasciculate, 2-15 cm. long, 0.1-0.3 mm. wide, with a more or less pungent point; stipules adnate to the leaf-bases, whitish, the sheath 1-2 cm. long, the free part shorter ; spikes 1-3 cm. long, many-flowered, often interrupted; peduncles slender, 5-18 cm. long; nutlets at least 2.5 mm. long, with 2 obscure lateral keels but no median one ; style projecting at least 0.6 mm. above the body of the fruit ; embryo a complete or incomplete spiral, the apex pointing directly towards the base or inside it.
Type locality : Europe.
Distribution : Throughout North America, except Central America and the West Indies ;
- bibliographic citation
- Percy Wilson, Per Axel Rydberg, Norman Taylor, Nathaniel Lord Britton, John Kunkel Small, George Valentine Nash. 1909. PANDANALES-POALES; TYPHACEAE, SPARGANACEAE, ELODEACEAE, HYDROCHARITACEAE, ZANNICHELLIACEAE, ZOSTERACEAE, CYMODOCEACEAE, NAIADACEAE, LILAEACEAE, SCHEUCHZERIACEAE, ALISMACEAE, BUTOMACEAE, POACEAE (pars). North American flora. vol 17(1). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Potamogeton interruptus Kit.; Schultes, Oestr. Fl
ed. 2. 1 : 328. 1814.
P6tamogeton fiabellatus Bab. Man. Bot. ed. 3. 343. 1851. Potamogeton pectinalus interruptus Aschers. Fl. Brand. 1 : 666. 1864.
Stem whitish, branched ; leaves all submerged, linear, entire, 2-8.5 cm. long, 1-1,5 mm. wide, acute, acuminate or obtuse at the apex; primary nerves 1-5, rarely with a few crossnerves ; stipules adnate to the leaf -bases, the sheath 1-2 cm. long and not scarious except on the edges, the free part shorter, scarious ; spikes 2-4.5 cm. long, interrupted, the flower clusters often 1 cm. apart ; peduncles whitish, thinner than the stem, 3-7 cm, long ; nutlets 3-keeled, the middle keel larger than the lateral ones ; embryo a complete or incomplete spiral, the apex pointing towards or inside the base.
Type locality : Hungary.
Distribution : Michigan, Wisconsin, Nebraska, and Saskatchewan ; apparently in Guatemala.
- bibliographic citation
- Percy Wilson, Per Axel Rydberg, Norman Taylor, Nathaniel Lord Britton, John Kunkel Small, George Valentine Nash. 1909. PANDANALES-POALES; TYPHACEAE, SPARGANACEAE, ELODEACEAE, HYDROCHARITACEAE, ZANNICHELLIACEAE, ZOSTERACEAE, CYMODOCEACEAE, NAIADACEAE, LILAEACEAE, SCHEUCHZERIACEAE, ALISMACEAE, BUTOMACEAE, POACEAE (pars). North American flora. vol 17(1). New York Botanical Garden, New York, NY
Stuckenia pectinata
provided by wikipedia EN
Stuckenia pectinata (syn. Potamogeton pectinatus), commonly called sago pondweed[1] or fennel pondweed, and sometimes called ribbon weed, is a cosmopolitan water plant species that grows in fresh and brackish water on all continents except Antarctica.
Description
Stuckenia pectinata is a fully submerged aquatic plant and does not have any floating or emerged leaves.
The flowers are wind pollinated and the seeds float. Tubers that are rich in starch are formed on the rhizomes. Reproduction can either be vegetative with tubers and plant fragments or sexual with seeds.
Wildlife
The whole plant provides food for different species of waterbirds.
Description
Leaves with the typical zigzag-formed stem
Stuckenia pectinata has long narrow linear leaves which are less than 2 mm wide; each is composed of two slender, parallel tubes. The main difference from other narrow-leaved pondweeds is that the stipule joins the leaf base, when it is pulled the sheath and stipule comes away, similar to a grass sheath and ligule. The fruits are 3 to 5 mm long.
Ecology
The nutritious tubers are an important food source for waterfowl, including the canvasback, which help disperse the plant.[2]
The plant can become a nuisance weed in waterways such as canals, because it is tolerant to eutrophication.
Gallery
References
- license
- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
Stuckenia pectinata: Brief Summary
provided by wikipedia EN
Stuckenia pectinata (syn. Potamogeton pectinatus), commonly called sago pondweed or fennel pondweed, and sometimes called ribbon weed, is a cosmopolitan water plant species that grows in fresh and brackish water on all continents except Antarctica.
- license
- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
