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Eriocaulon cinereum

(Ashy Pipewort)

Interesting Facts

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Common Names

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Common Names in English:

Ashy Pipewort

Description

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Family Eriocaulaceae

Herbs perennial or annual . Leaves in a rosette, grasslike, linear , occasionally thinly filiform , often thin and transparent, fenestrate, base sheathing . Inflorescences capitate, globose to ovoid ; scapes thin, twisted, angled , base surrounded by a bladeless, tubular sheath . Flowers 2- or 3-merous, bracteate , with both sexes usually in same head . Male flowers: sepals 2 or 3, connate or free ; petals 2 or 3, often inconspicuous; stamens 6. Female flowers: sepals 2 or 3, free or connate; petals absent to 4, free; ovary (1--) 3-loculed; ovules 1 per locule, basal; style 1, 1--3-branched. Fruit a capsule, thin, loculicidal. Seeds small; testa usually reticulate and prickly; endosperm with abundant starch grains.

Ten genera and ca. 1150 species: mainly in tropical and subtropical regions; one genus and 35 species (13 endemic) in China.[1]

Genus Eriocaulon

Herbs, annual or perennial , often cespitose, rosulate. Roots : larger roots unbranched, pale , septate , thickened, spongy . Stems rarely sparingly branched, short or elongate . Leaves many ranked in flat or high spiral ; blade basally pale, distally greener, linear-attenuate or triangular-acuminate, lingulate , narrowing gradually or abruptly from base , base noticeably lacunate , less distinctly so distally. Inflorescences: scape sheaths tubular , orifice oblique (often 2--3-cleft) ; scapes 1--several per rosette, glabrous ; heads pale to dark, white, gray, or gray-brown, hemispheric to globose or short-cylindric; receptacle hairy or glabrous; involucral bracts obscured or not obscured by inflorescence, pale to dark, chaffy or scarious ; receptacular bracts narrower, thinner than involucral bracts, often scarious. Flowers mostly with staminate and pistillate on same plants , 2--3-merous; sepals 2(--3), adnate to stipelike base, boat-shaped , scarious, apex often covered with multicellular hairs , hairs mealy white or translucent , frequently club-shaped; petals 2(--3), narrower, shorter than sepals, apex hairy, hairs club-shaped, glands adaxial , subapical , dark, rarely pale. Staminate flowers : androphore apically dilated stalk ; petals separated from sepals by androphore, diverging as lobes from apex; stamens 3--4 or 6, 2--3 alternating with petals; apex of staminal column with 2--3 glands, glands unappendaged; filaments arising from androphore rim; anthers 2-locular, 4-sporangiate, dorsifixed , usually versatile, well exserted at anthesis , jet black (except in E. cinereum) . Pistillate flowers: gynophore separating petals from sepals, stipelike; pistil 2(--3) -carpellate; style 1, unappendaged, style branches 2(--3) .

Species ca. 400: mostly pantropic, mostly aquatic or on wet, mainly acidic substrates.[2]

Physical Description

Species Eriocaulon cinereum

Herbs, annual or short-lived perennial , 15--30 cm. Leaves linear-attenuate, to 10 cm, apex subulate-filiform. Inflorescences: scape sheaths shorter than principal leaves, loose ; scapes filiform , 0.5 mm wide, 6--8-ribbed; mature head silvery-gray, ovoid to nearly globose , 4--5 mm wide, soft; receptacle sparsely pilose , hairs translucent ; involucral bracts spreading-ascending, not obscured by bracteoles and flowers of mature heads, pale , ovate to oblong , oblanceolate or broadly obovate , grading narrower inward, 2 mm, margins often lacerate or erose, apex acute, glabrous ; receptacular bracts pale except for gray midzone, linear-oblong, 2 mm, margins erose or entire, apex acute, glabrous. Staminate flowers : sepals 3, dark, either deeply and narrowly lobed or broadly spatulate , 3-dentate, 1.5 mm, distally with scattered white, linear , short hairs; androphore flaring ; petals 3, oblong, apex with white, tapering hairs; stamens 6; anthers yellow. Pistillate flowers: sepals 3, 2 linear-elliptic, 1 broadly elliptic-oblanceolate, concave , 1.5 mm, apex acute, sometimes with few translucent hairs; gynophore 1 mm with 3 spreading , peglike, minute appendages ; pistil 3-carpellate. Seeds pale brown, ovoid or broadly ellipsoid , 4.5 mm, finely reticulate , alveolae horizontally rectangular. [source]

Habit: Forb/herb

Flowers: Bloom Period: May, June, July, August, September, October.

Habitat

Muck of rice fields ; 0--200 m ; introduced [3].

Typically found at an altitude of 0 to 3,662 meters (0 to 12,014 feet).[4]

Biology

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Reproduction

Duration: Annual , Perennial

Taxonomy

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Synonyms

Eriocaulon sieboldianum Siebold & Zuccarini Ex Steudel

Notes

Name Status: Accepted Name .

Last scrutiny: 21-Jun-2005

Similar Species

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Members of the genus Eriocaulon

ZipcodeZoo has pages for 21 species, subspecies, varieties, forms, and cultivars in this genus:

E. aquaticum (Seven-Angle Pipewort) · E. benthamii (Bentham's Pipewort) · E. cinereum (Ashy Pipewort) · E. compressum (Flattened Pipewort) · E. compressum var. compressum (Flattened Pipewort) · E. decangulare (Ten-Angle Pipewort) · E. decangulare L. var. latifolium Chapm. ex Moldenke (Tenangle Pipewort) · E. decangulare var. decangulare (Tenangle Pipewort) · E. decangulare var. latifolium (Tenangle Pipewort) · E. heterolepis (Buttonhead Pipewort) · E. koernickianum (Gulf Pipewort) · E. koernickianum van (Gulf Pipewort) · E. lineare (Narrow Pipewort) · E. longifolium (Pipewort) · E. microcephalum (Small-Head Pipewort) · E. nigrobracteatum (Black-Bract Pipewort) · E. parkeri (Estuary Pipewort) · E. ravenelii (Ravenel's Pipewort) · E. stellulatum (Starry Pipewort) · E. texense (Texas Pipewort) · E. truncatum (Short Pipe-Wort)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 24, 2007:

Identifiers

Footnotes

  1. Wei-liang Ma, Zhixiang Zhang & Thomas Stützel "Eriocaulaceae". in Flora of China Vol. 24 Page 7. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Eriocaulon". in Flora of North America Vol. 22. Oxford University Press. Online at EFloras.org. [back]
  3. "Eriocaulon cinereum". in Flora of North America Vol. 22. Oxford University Press. Online at EFloras.org. [back]
  4. Mean = 325.630 meters (1,068.340 feet), Standard Deviation = 682.640 based on 94 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012