Comments
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North American representatives of this species have been regarded as being varietally distinct from Eurasian plants on the basis of follicle and stigma characters (M. L. Fernald 1923). Variability in those characters, in specimens from both hemispheres, vitiates their worth for varietal distinction.
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Description
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Herbs, glabrous. Rhizomes creeping, jointed, freely branching. Stems flexuous, zigzag, 1--4 dm. Leaves striate; cauline leaves gradually reduced to bracts; sheaths 1.5--10 cm, ligules 2--12 mm; hairs within leaf sheath 0.2--2 cm; blade 2--41 cm × 1--3 mm. Inflorescences 3--12-flowered, 3--10 cm; proximal bract foliaceous; distalmost sheaths sometimes bladeless; pedicels spreading, 5--25 mm. Flowers: tepals in 2 similar series of 3 each, white to yellow-green, lance-ovate to lanceolate, 1-veined, 2--3 mm, membranous, apex acute; filaments filiform; anthers linear, elongate; pistils 6--7 mm; styles oblong; stigmas papillose. Follicles light green to brown, ovoid, 4--10 mm, leathery, dehiscing on curved, adaxial side; beak 0.5--1 mm. Seeds brown to black, ovoid, 4--5 mm, smooth, hard; endosperm absent. 2n = 22.
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Distribution
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Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que., Sask., Yukon; Alaska, Calif., Conn., Idaho, Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mont., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., Vt., Wash., W.Va., Wis.; Eurasia.
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Flowering/Fruiting
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Flowering in late spring.
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Habitat
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Sphagnum bogs, marshes, and lake margins; 0--2000m.
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Synonym
provided by eFloras
Scheuchzeria palustris var. americana Fernald; S. palustris subsp. americana (Fernald) Hultén; S. americana (Fernald) G. N. Jones
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Comprehensive Description
provided by North American Flora
Scheuchzeria palustris L. Sp. PL 338. 1753
Leaves 10^10 cm. long, the upper ones reduced to bracts; stems solitary or several, usually clothed at the base with the remains of old leaves, lO^tt) cm. tall ; sheaths of the basal leaves often 10 cm. long with a ligule 12 mm. long; pedicels spreading in fruit; flowers white, few, in a lax raceme ; perianth-segments oblong, membranous, 1-nerved, 3 mm. long, the inner ones the narrower ; lower fruiting pedicels 5-25 mm. long ; follicles 4-8 mm. long, slightly if at all united at the base; seeds oval, brown, with a very hard coat.
Type locality : Lapland.
Distribution : Labrador to Alaska, New Jersey, Pennsylvania, Wisconsin, Montana, and California ; also in northern Europe and Asia.
- 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
Scheuchzeria
provided by wikipedia EN
Scheuchzeria palustris (Rannoch-rush,[2] or pod grass), is a flowering plant in the family Scheuchzeriaceae, in which there is only one species and Scheuchzeria is the only genus. In the APG II system it is placed in the order Alismatales of the monocots.[3]
Description
It is a herbaceous perennial plant, native to cool temperate regions of the Northern Hemisphere, where it grows in wet Sphagnum peat bogs. It grows to 10–40 cm tall, with narrow linear leaves alternating up the stem, with a basal sheath. The leaves can be up to 20 cm. The leaf tips are blunt with a conspicuous pore.[4]
It has a creeping rhizome clothed in papery, straw coloured remains of old leaf bases.
The flowers are greenish-yellow, 4–6 mm diameter, with six tepals. They have an inflated sheathing base, 6 stamens and 3 carpels. It flowers from June until August[5][6][7]
There are two subspecies, not considered distinct by all authorities:[6][7][8]
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Scheuchzeria palustris subsp. palustris. Northern and eastern Europe, northern Asia.
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Scheuchzeria palustris subsp. americana (Fernald) Hultén. Northern North America.
Etymology
The genus is named after Johann Jakob Scheuchzer, a Swiss naturalist, and his brother, Johann Gaspar Scheuchzer.[9] The species name is from the Latin for a swamp.
The English name refers to its occurrence on Rannoch Moor in central Scotland, the first site in Great Britain the species was known from, and only one where it currently occurs; it is extinct at a few other wetland sites further south in Britain, being found in pools and wet hollows of ancient undisturbed Sphagnum bogs.[10][11]
Stem with seeds, left; winter stem, right
References
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Scheuchzeria: Brief Summary
provided by wikipedia EN
Scheuchzeria palustris (Rannoch-rush, or pod grass), is a flowering plant in the family Scheuchzeriaceae, in which there is only one species and Scheuchzeria is the only genus. In the APG II system it is placed in the order Alismatales of the monocots.
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