Comments
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anglais
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fourni par eFloras
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.
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Description
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anglais
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fourni par eFloras
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.
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Distribution
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Ala., Ark., Del., D.C., Fla., Ga., La., Md., Miss., N.J., N.C., S.C., Tenn., Tex., Va.; Mexico; Central America (Nicaragua).
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Flowering/Fruiting
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Flowering late spring--summer.
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Habitat
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anglais
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Moist to wet sands or peats of shores, pine savanna, ditches, edges of cypress domes or savanna; 0--300m.
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Synonym
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Eriocaulon serotinum Walter; E. statices Crantz; Randalia decangularis Palisot de Beauvois; Symphachne xyrioides (Linnaeus) Palisot de Beauvois
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Comprehensive Description
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anglais
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fourni par North American Flora
Eriocaulon decangulare L. Sp. PI. 87. 1753
Eriocaulon slalices Crantz, Inst. 1: 360. 1766.
Eriocaulon serotinum Walt. Fl. Car. 83. 1788.
Randalia decangularis ['decangulare"] Beauv.; Desv. Ann. Sci. Nat. 13: 47. 1828.
Symphachne xyroides Beauv.; Desv. Ann. Sci. Nat. 13: 48. 1828.
Plants monoecious; stems very short; leaves tufted, rather rigid, not pellucid, linear, 4.535 cm. long, 3-11 mm. wide at the middle, gradually narrowed from the dilated base, at first mucronulate-acute, finally obtuse, fenestrately many-nerved beneath, especially toward the base, the fenestrations often inconspicuous, the margins often revolute; peduncles 1-3, rigid, 20-100 cm. long, glabrous, prominently many-costate; sheaths rather loose, 9-16 cm. long, 2-5 mm. wide, prominently striate, slightly or not at all twisted, glabrous, mostly bilobed at apex; heads dense-flowered, tough, not at all compressed in drying, hemispheric or globose, 7-12 mm. in diameter, white-villose; involucral bractlets stramineous, ovate, acute, very densely tomentellous toward apex; receptacle large, tough, long-villose; receptacular bractlets stramineous, oblong-spatulate, rather rigid, surpassing the florets, long-acuminate, densely pilose toward apex on the back, glabrescent in age; staminate florets: sepals 2, grayish-flavidulous, broadly spatulate, navicular, carinate or subcarinate, rather acute, densely villose toward apex on the back, sparsely villose within; petal-tube stramineous, its lobes 2, small, whitish, slightly unequal, pilose, glanduliferous; anthers 4, black; pistillate florets: sepals 2, grayish-flavidulous, oblong, acute, densely long-villose on the back, navicular; petals 2, white, rather thick, spatulate, obtuse, pilose, glanduliferous; style shorter than the ovary; stigmas 2, more than twice as long as the ovary.
Type locality: In swamps, North America.
Distribution: Moist pinelands and acid swamps on the Coastal Plain and rarely adjacent provinces from New Jersey and southern Pennsylvania to Florida and Texas. Erroneously reported from Cuba.
- citation bibliographique
- Albert Charles Smith, Harold Norman Moldenke, Edward Johnston Alexander. 1937. XYRIDALES. North American flora. vol 19(1). New York Botanical Garden, New York, NY
Eriocaulon decangulare
(
anglais
)
fourni par wikipedia EN
Eriocaulon decangulare, commonly known as ten-angled pipewort, hat pin and bog button, is a monocotyledonous plant native to the eastern United States, Mexico and Nicaragua. The plant's distribution is quite irregular, with several disjunct populations and a discontinuous primary range. Most of its habitat in the United States is found on the Atlantic Coastal Plain. It is found in areas of relatively low elevation and does not occur higher than 300 metres above sea level. This plant is found in peat and sand that is moist to wet, and is associated with savannahs, bogs, pinelands, ditches and the banks of cypress domes.
Distribution and habitat
Eriocaulon decangulare is found in the United States, Mexico and Nicaragua.[3] In the United States it is mainly confined to the Atlantic Coastal Plain, but several significant outlying populations also exist in more mountainous and inland regions.[3][4] It does appear to be absent from the intermediate Piedmont region, however. The northernmost populations are in coastal New Jersey and Delaware, stretching south to Florida. There is a significant break in the range along the coast in Georgia. The range then extends along the Gulf Coast though Alabama and Mississippi and just enters Louisiana. There is also a relatively large disjunct distribution in northern Alabama. The primary range breaks once more before starting again in central Louisiana, whence it extends into eastern Texas. Southern Arkansas supports another large disjunct distribution.[3]
Ecology
A study in North Carolina of three inland, mountainous populations found the ten-angled pipewort has a high affinity for acidic soil, ranging from a pH 4.1 to 5.2 in their samples. At all sites, 58 to 71% of all the plants it occurred with were either obligate or facultative wetland plants. Sphagnum mosses were another conspicuous element of the habitat, with 30 to 60% of the studied sites being covered with them. The results of the study suggest that Eriocaulon decangulare benefits from disturbance due to its affinity for high sunlight. The smallest population examined was in only 50% full sunlight, while the other two were in full sunlight more than 90% of the day and supported much larger populations. As such, the control of woody plant growth, either naturally or artificially, is important to maintain healthy populations of the plant. The ten-angled pipewort was found to occur with several rare or threatened wetland plants, such as Cleistes divaricata (spreading pogonia), Drosera rotundifolia (round-leaved sundew), Carex trichocarpa (hairy-fruit sedge) and Sanguisorba canadensis (Canada burnet), though these associations differed from site to site.[5]
References
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^ Curtis’s botanical magazine; or flower garden displayed. London, 1832, volume 59 (plate 3126).
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^ "Eriocaulon decangulare". NatureServe Explorer. NatureServe. Retrieved 2007-12-18.
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^ a b c Kral, Robert (2006), "Eriocaulon decangulare", in Flora of North America Editorial Committee, eds. 1993+ (ed.), Flora of North America, vol. 22, New York & Oxford: Oxford University Press
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^ Radford, Albert E.; Ahles, Harry E.; Bell, C. Ritchie (1964), Manual of the Vascular Flora of the Carolinas, Chapel Hill: University of North Carolina Press, p. 36, ISBN 0-8078-1087-8
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^ Rossell, Irene M.; Losure, David A.; Losure, David A. (2005), "The Habitat and Plant Associates of Eriocaulon decangulare L. in Three Southern Appalachian Wetlands", Castanea, 70 (2): 129–135, doi:10.2179/0008-7475(2005)070[0129:THAPAO]2.0.CO;2, ISSN 0008-7475
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Eriocaulon decangulare: Brief Summary
(
anglais
)
fourni par wikipedia EN
Eriocaulon decangulare, commonly known as ten-angled pipewort, hat pin and bog button, is a monocotyledonous plant native to the eastern United States, Mexico and Nicaragua. The plant's distribution is quite irregular, with several disjunct populations and a discontinuous primary range. Most of its habitat in the United States is found on the Atlantic Coastal Plain. It is found in areas of relatively low elevation and does not occur higher than 300 metres above sea level. This plant is found in peat and sand that is moist to wet, and is associated with savannahs, bogs, pinelands, ditches and the banks of cypress domes.
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Eriocaulon decangulare
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vietnamien
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fourni par wikipedia VI
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Eriocaulon decangulare: Brief Summary
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vietnamien
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fourni par wikipedia VI
Eriocaulon decangulare là một loài thực vật có hoa trong họ Cỏ dùi trống. Loài này được L. mô tả khoa học đầu tiên năm 1753.
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Bài viết liên quan đến Họ Cỏ dùi trống này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. 
