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Cyperaceae taxon details

Eleocharis parishii Britton

1680530  (urn:lsid:marinespecies.org:taxname:1680530)

accepted
Species
terrestrial
Not documented
Description lants perennial, mat-forming; rhizomes evident, long, 0.5–1(–2) mm thick, firm, cortex persistent, longer internodes...  
Description lants perennial, mat-forming; rhizomes evident, long, 0.5–1(–2) mm thick, firm, cortex persistent, longer internodes 5–30 mm, scales often fugaceous, 5–10 mm, membranous, not fibrous. Culms terete or cross section elliptic (or rectangular), usually with to 8 blunt ridges when dry, 10–50 cm × 0.2–0.7(–1) mm, soft to firm, spongy. Leaves: distal leaf sheaths persistent, not splitting, mostly proximally dark red, distally red to brown or green, thinly papery to thickly membranous, apex usually red brown, subtruncate to obtuse or subacute, callose, tooth often present on most or all culms, to 1 mm. Spikelets narrowly lanceoloid (to narrowly cylindric), 3–20 × 1.5–2.5 mm, apex acute; proximal scale amplexicaulous, entire; subproximal scale empty or with flower; floral scales appressed or spreading in fruit, 15–40, 3–4 per mm of rachilla, orange brown, midrib regions often greenish, ovate, 2–3 × 1 mm, apex entire, rounded to obtuse in proximal part of spikelet, acute in distal part, carinate, at least in distal part of spikelet. Flowers: perianth bristles 3–7, rarely apparently absent, stramineous to whitish, slender to stout, often unequal, rudimentary to slightly exceeding tubercle; stamens 3; anthers yellow to stramineous, 1.1–2 mm; styles 3-fid, 0.3–0.4 × 0.2–0.3 mm. Achenes falling with scales, yellow-brown or dark brown, ellipsoid or obovoid to obpyriform, compressed-trigonous, angles evident to obscure, rarely prominent, 0.8–1.4 × 0.5–0.7 mm, neck absent to long, smooth or sometimes minutely cancellate at 20–30X. Tubercles whitish, pyramidal, often higher than wide, 0.3–0.4 × 0.25–0.35 mm. 2n = 10. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. New York Microscop. Soc. 5: 111 1889 to J. New York Microscop....  
Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. New York Microscop. Soc. 5: 111 1889 to J. New York Microscop. Soc. 5: 111 (1889), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Eleocharis parishii Britton. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680530 on 2025-09-12
Date
action
by
2023-09-06 07:35:01Z
created
2024-12-10 11:47:54Z
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Nomenclature

basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details] 

 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

From editor or global species database
Description lants perennial, mat-forming; rhizomes evident, long, 0.5–1(–2) mm thick, firm, cortex persistent, longer internodes 5–30 mm, scales often fugaceous, 5–10 mm, membranous, not fibrous. Culms terete or cross section elliptic (or rectangular), usually with to 8 blunt ridges when dry, 10–50 cm × 0.2–0.7(–1) mm, soft to firm, spongy. Leaves: distal leaf sheaths persistent, not splitting, mostly proximally dark red, distally red to brown or green, thinly papery to thickly membranous, apex usually red brown, subtruncate to obtuse or subacute, callose, tooth often present on most or all culms, to 1 mm. Spikelets narrowly lanceoloid (to narrowly cylindric), 3–20 × 1.5–2.5 mm, apex acute; proximal scale amplexicaulous, entire; subproximal scale empty or with flower; floral scales appressed or spreading in fruit, 15–40, 3–4 per mm of rachilla, orange brown, midrib regions often greenish, ovate, 2–3 × 1 mm, apex entire, rounded to obtuse in proximal part of spikelet, acute in distal part, carinate, at least in distal part of spikelet. Flowers: perianth bristles 3–7, rarely apparently absent, stramineous to whitish, slender to stout, often unequal, rudimentary to slightly exceeding tubercle; stamens 3; anthers yellow to stramineous, 1.1–2 mm; styles 3-fid, 0.3–0.4 × 0.2–0.3 mm. Achenes falling with scales, yellow-brown or dark brown, ellipsoid or obovoid to obpyriform, compressed-trigonous, angles evident to obscure, rarely prominent, 0.8–1.4 × 0.5–0.7 mm, neck absent to long, smooth or sometimes minutely cancellate at 20–30X. Tubercles whitish, pyramidal, often higher than wide, 0.3–0.4 × 0.25–0.35 mm. 2n = 10. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from J. New York Microscop. Soc. 5: 111 1889 to J. New York Microscop. Soc. 5: 111 (1889), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
    Definitions

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