Cyperaceae taxon details
Cephalocarpus marahuacensis S.M.Costa
1777527 (urn:lsid:marinespecies.org:taxname:1777527)
accepted
Species
recent only
Costa, S. M.; Thomas, W. W.; Amaral, M. D. C. E. D. (2024). Four new species from Venezuela and identification key to <i>Cephalocarpus</i> (Cryptangieae, Cyperaceae). <em>Phytotaxa.</em> 670(2): 119-126., available online at https://doi.org/10.11646/phytotaxa.670.2.4
page(s): 121 [details] Available for editors
[request]
page(s): 121 [details] Available for editors
[request]
Holotype NY 02480927, geounit Amazonas
Holotype NY 02480927, geounit Amazonas [details]
Description Monoecious herb: sexes intermingled at paracladia, monomorphic. Caudex 4.5–6 mm diam. including sheaths remains
and...
and...
Description Monoecious herb: sexes intermingled at paracladia, monomorphic. Caudex 4.5–6 mm diam. including sheaths remains
and adventitious roots. Leaf: sheath greenish, margin glabrous or sparse-pubescent; blade 3–5 cm × 0.08–0.13 cm,
linear, no main midrib, margin and midrib glabrous or sparse pubescent, concolorous, greenish. Inflorescence reduced,
panicle-like, single at each prophyll, 2 paracladia; culm 1.3–1.5 × 0.05–0.07 cm, compressed, glabrous. Paracladia
(lowermost) 0.5–1.5 cm long, 1–2 orders; peduncle up to 1cm, compressed, glabrous. Involucral bract (lowermost)
leaf-like: sheath 0.3 cm, mouth pubescent, yellowish/reddish-brown; blade 1–1.2 × 0.09 cm, “M”-shaped, glabrous to
sparse and long ciliate, yellowish/reddish-brown. Male spikelet 3.5–4 × 0.7–0.8 mm, 1–2 flowers, 5–6 glumes; glume
(outermost) –2,5 mm long, margin ciliate, mucronate (ciliate mucron up to ~0.6mm long); stamens 2, connective
projection short ciliate. Female spikelet ~4 × ~1mm, 4–5 glumes; glume (outermost) –2,5 mm long, margin ciliate,
mucronate (ciliate mucron up to ~0.6mm long); stigmas 3. Fruit 2–4 × ~1 mm, obovoid, smooth, apex ciliate, light
brown to brown, apex rounded; hypogynous scale –1.2 mm long, orbicular or obtriangular, trichome –1mm long; beak
–0.8 mm long, linear, glabrous [details]
and adventitious roots. Leaf: sheath greenish, margin glabrous or sparse-pubescent; blade 3–5 cm × 0.08–0.13 cm,
linear, no main midrib, margin and midrib glabrous or sparse pubescent, concolorous, greenish. Inflorescence reduced,
panicle-like, single at each prophyll, 2 paracladia; culm 1.3–1.5 × 0.05–0.07 cm, compressed, glabrous. Paracladia
(lowermost) 0.5–1.5 cm long, 1–2 orders; peduncle up to 1cm, compressed, glabrous. Involucral bract (lowermost)
leaf-like: sheath 0.3 cm, mouth pubescent, yellowish/reddish-brown; blade 1–1.2 × 0.09 cm, “M”-shaped, glabrous to
sparse and long ciliate, yellowish/reddish-brown. Male spikelet 3.5–4 × 0.7–0.8 mm, 1–2 flowers, 5–6 glumes; glume
(outermost) –2,5 mm long, margin ciliate, mucronate (ciliate mucron up to ~0.6mm long); stamens 2, connective
projection short ciliate. Female spikelet ~4 × ~1mm, 4–5 glumes; glume (outermost) –2,5 mm long, margin ciliate,
mucronate (ciliate mucron up to ~0.6mm long); stigmas 3. Fruit 2–4 × ~1 mm, obovoid, smooth, apex ciliate, light
brown to brown, apex rounded; hypogynous scale –1.2 mm long, orbicular or obtriangular, trichome –1mm long; beak
–0.8 mm long, linear, glabrous [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Cephalocarpus marahuacensis S.M.Costa. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1777527 on 2025-03-31
Date
action
by
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
Costa, S. M.; Thomas, W. W.; Amaral, M. D. C. E. D. (2024). Four new species from Venezuela and identification key to <i>Cephalocarpus</i> (Cryptangieae, Cyperaceae). <em>Phytotaxa.</em> 670(2): 119-126., available online at https://doi.org/10.11646/phytotaxa.670.2.4
page(s): 121 [details] Available for editors [request]
page(s): 121 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
Holotype NY 02480927, geounit Amazonas [details]
From editor or global species database
Description Monoecious herb: sexes intermingled at paracladia, monomorphic. Caudex 4.5–6 mm diam. including sheaths remainsand adventitious roots. Leaf: sheath greenish, margin glabrous or sparse-pubescent; blade 3–5 cm × 0.08–0.13 cm,
linear, no main midrib, margin and midrib glabrous or sparse pubescent, concolorous, greenish. Inflorescence reduced,
panicle-like, single at each prophyll, 2 paracladia; culm 1.3–1.5 × 0.05–0.07 cm, compressed, glabrous. Paracladia
(lowermost) 0.5–1.5 cm long, 1–2 orders; peduncle up to 1cm, compressed, glabrous. Involucral bract (lowermost)
leaf-like: sheath 0.3 cm, mouth pubescent, yellowish/reddish-brown; blade 1–1.2 × 0.09 cm, “M”-shaped, glabrous to
sparse and long ciliate, yellowish/reddish-brown. Male spikelet 3.5–4 × 0.7–0.8 mm, 1–2 flowers, 5–6 glumes; glume
(outermost) –2,5 mm long, margin ciliate, mucronate (ciliate mucron up to ~0.6mm long); stamens 2, connective
projection short ciliate. Female spikelet ~4 × ~1mm, 4–5 glumes; glume (outermost) –2,5 mm long, margin ciliate,
mucronate (ciliate mucron up to ~0.6mm long); stigmas 3. Fruit 2–4 × ~1 mm, obovoid, smooth, apex ciliate, light
brown to brown, apex rounded; hypogynous scale –1.2 mm long, orbicular or obtriangular, trichome –1mm long; beak
–0.8 mm long, linear, glabrous [details]
