dcsimg

Comments

provided by eFloras
It is commonly grown in aquaria.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 7 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
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eFloras

Description

provided by eFloras
A caulescent submerged herb with coarse, up to 10 cm long, terete stolons. Leaves redical, linear-oblong, ribbon-shaped, upto 50 cm long, 1-1.5 (-2) cm broad, faintly 7-9-costate, costae parallel. intercostals present, longitudinally brown-black striped, margins faintly denticulate to entire, obtuse. Male spathes oblong, c. 6 mm long, peduncles 2-3 cm long. Male flowers pedicellate, c. 0.5 mm across; sepals unequal, recurved; stamen solitary by fusion or 2, erect. Female spathe 1-2 cm long, enveloping the ovary to more than half its length, bilobed at apex, peduncle filiform, longer to nearly as long as leaves, spirally coiled in fruit. Female flower: solitary; sepals ovate-oblong. 1.5-4 mm long, c. 1-2 mm broad, obtuse, persistent; ovary 1.5-2.5 cm long, styles 3. bifid, alternating with the scarious rudimentary petals, stigmas hairy. Fruit up to 20 cm long, greensih-yellow, many-seeded. Seeds fusiform to cylindrical, 1.5-3 mm long.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 7 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Distribution: South Europe, West Asia to Indo-Pakistan subcontinent.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 7 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Flower/Fruit

provided by eFloras
Fl. Per.: October-March.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 7 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Comprehensive Description

provided by North American Flora
Vallisneria spiralis L. Sp. PL 1015. 1753
Leaves thin, linear, 1-5 dm. long, 3-8 mm. wide, obtuse or acutish, usually minutely denticulate, especially towards the apex; peduncles of the staminate plant 1-5 cm, long; «
spathe ovoid, 8-10 cm. long ; peduncles of the pistillate plant thread-like, 3-6 dm. long, in fruit spirally twisting, drawing the fruit underwater; spathe tubular, usually close around the flower, 1-1.5 cm. long; .hypanthium in flower 1-2 cm. long, 1.5-2 mm. thick, in fruit 5-12 cm. long ; sepals elliptic, 2-3 mm. long ; petals minute ; stigmas sessile, ovate in outline, 2-cleft for less than half their length.
Type locality : Pisa [Italy] .
Distribution : In water from. Nova Scotia to Virginia, Indiana, and South Dakota ; also in Europe and Asia.
license
cc-by-nc-sa-3.0
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
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North American Flora