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Eriocaulon decangulare

(Ten-Angle Pipewort)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Ten-Angle Pipewort, Tenangle 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 decangulare

Herbs, perennial , 30--110 cm. Leaves linear or linear-attenuate, abruptly, then gradually, narrowing, 10--40(--50) cm, apex acute or obtuse . Inflorescences: scape sheaths shorter than principal leaves; scapes linear, distally 1--2(--3) mm wide, multiribbed; heads dull white, hemispheric to nearly globose , 7--15 mm wide, hard, very slightly flattened when pressed; receptacle copiously hairy ; involucral bracts reflexed , obscured by reflexed proximal bracteoles and flowers, straw-colored, narrowly ovate to lanceolate, 2--4 mm, margins erose to entire, apex acute, glabrous or apex with white, club-shaped hairs ; inner bracts and receptacular bracteoles pale , linear to oblong or lanceolate, 3--4 mm, margins entire, sometimes becoming erose, apex narrowly acuminate, glabrous or apex with white, club-shaped hairs. Staminate flowers: sepals 2, yellow-white, linear, curved , 3 mm, distal surface abaxially, adaxially with white, club-shaped hairs; androphore club-shaped; petals 2, yellow-white, translucent , triangular to linear, nearly equal, with small tuft of white, club-shaped hairs abaxially at apex; stamens 4; anthers black. Pistillate flowers: sepals 2, yellow-white, linear, 2--3 mm, apex acute, abaxially with white, club-shaped hairs at apex; petals 2, pale, spatulate or narrowly elliptic , 1--2 mm, abaxially with translucent hairs proximally, white, club-shaped hairs distally, or adaxially glabrescent; pistil 2-carpellate. Seeds pale brown, ellipsoid , 0.75--1 mm, very finely cancellate or sometimes with cancellae concealed by rows of delicate nearly appressed hairs. [source]

A possible variety, Eriocaulon decangulare var. latifolium Chapman ex Moldenke [in N. L. Britton et al. , N. Amer. Fl. 19(1) : 21. 1937], has yet to be thoroughly investigated. This plant typically is in the taller range and has thicker stems and scapes than in the type; it has very stiff blunt leaves to 50 cm ´ 13--20 mm with thicker scapes, heads 13--20 mm wide, and floral parts in the high range for the species. It occurs in wetter situations than usual for the species, and (fide R. R. Haynes, pers. comm. ) flowers later. This morphology occurs in northwestern Florida and southern Alabama within boggy edges of cypress-titi-Nyssa on permanently wet substrates. [source]

Habit: Forb/herbGrowth Form: BunchShape and Orientation: Erect

Flowers: Bloom Period: April, May, June, July. • Flower Color: White • Flower Conspicuous: No

Seeds: Seed Spread Rate: Moderate • Seedling Vigor: Low • Fruit/Seed Abundance: Medium • Fruit/Seed Color: Brown • Fruit/Seed Conspicuous: Yes • Cold Stratification Required: No

Foliage: Foliage Color: Dark Green • Foliage Porosity Summer: Porous • Foliage Porosity Winter: Porous • Foliage Texture: Medium • Fall Conspicuous: No • Leaf Retention: No

Size/Age/Growth

Active Growth Period: SpringGrowth Rate: Moderate • After Harvest Regrowth Rate: Slow • Mature Height (feet): 2.6 • Size: 6-12" tall. • Vegetative Spread Rate: None • Lifespan: Lifespan

Habitat

Moist to wet sands or peats of shores , pine savanna , ditches, edges of cypress domes or savanna; 0--300 m [3].

Typically found in the intertidal zone at the water's edge at a mean distance from sea level of 22 meters (72 feet).[4]

Biome: Coastal.

Biology

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Reproduction

Duration: PerennialCoppice Potential: No • Progagated by Bulbs: No • Propagated by Bare Root: No • Propagated by Container: No • Propagated by Corms: No • Propagated by Cuttings: No • Propagated by Seed: Yes • Propagated by Sod: No • Propagated by Sprigs: Yes • Propagated by Tubers: No • Fruit/Seed Period Begin: Summer • Fruit/Seed Period End: Summer • Fruit/Seed Persistence: Yes

Growth

Soil: Adapted to Medium Textured: Adapted to Medium Textured Soils • Adapted to Coarse Textured Soils: Yes • Anaerobic Tolerance: Medium • Salinity Tolerance: None • CaCO3 Tolerance: Low • Minimum pH: 4.0 • Maximum pH: 7.6 • Fertility Requirement: Medium

Sunlight: Sun Exposure: Full Sun . • Shade Tolerance: Intolerant

Moisture: Drought Tolerance: Medium • Minimum Precipitation: 40 • Maximum Precipitation: 60 • Moisture Use: Medium

Temperature: Minimum Temperature (F): -8 • Minimum Frost Free Days: 160

Taxonomy

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Synonyms

E. statices Crantz • Eriocaulon serotinum Walter • Randalia decangularis Palisot De Beauvois • Symphachne xyrioides (Linnaeus) Palisot De Beauvois

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 decangulare". in Flora of North America Vol. 22. Oxford University Press. Online at EFloras.org. [back]
  4. Standard Deviation = 63.380 based on 87 observations. Terrestrial altitude and ocean depth information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012