Cyperaceae taxon details
Hypolytrum glomerulatum M.Alves & W.W.Thomas
1678859 (urn:lsid:marinespecies.org:taxname:1678859)
accepted
Species
terrestrial
Not documented
Description Herbs robust, 0.8–0.9 m tall, rhizomatous, caespitose, perennial. Rhizome long creeping, 1.0–1.5 cm diam. Pseudoculm...
Taxonomic remark Source in seed data: wcs Updated namePublishedIn from Feddes Repert. 113: 265 2002 to Feddes Repert. 113(3-4): 265 (2002)....
Description Herbs robust, 0.8–0.9 m tall, rhizomatous, caespitose, perennial. Rhizome long creeping, 1.0–1.5 cm diam. Pseudoculm trigonous. Cataphylls brown, fibrous. Leaves basal; leaf blades linear, 1.0–1.1 m × 3.0–3.2 cm, arching, green, non-bullate, coriaceous, 3-costate with the secondary costae distinct, inverse W-shaped in cross-section, the margins and midrib scabrous, the apex acute; pseudopetiole absent; sheath margins 7–8 mm wide, brown, membranaceous. Culm 1 per plant, scapiform, central, erect, 0.7–0.9 m × 3.5–4.5 mm, trigonous, scabrous on angles, leafy; bract subtending the synflorescence foliaceous, linear, 50–58 cm long, surpassing the synflorescence; pseudopetiole absent. Synflorescence terminal, paniculiform, somewhat cylindric, lax, the main axis 8–12 cm long, branched, nodes 5–6, the 1st internode 2.2–5.5 cm long, the 2nd internode 2.5–2.8 cm long, the paraclades 6–9 on the basal node, patent to reflexed, the 2nd order ramification present and unbranched, the main epipodium 2.8–3.0 cm long, faintly scabrous; the prophylls faintly bikeeled. Spikes in terminal clusters, sessile, ellipsoid, 2–3 mm long; spicoid bracts 1.5–1.8 mm long, brown, the apex acute, the margins membranaceous; floral bracts 2, partly connate, apex often lacerate, 1.5–2 mm long, the keel wingless, faintly scabridulous. Staminate flowers 2 per spicoid, the anther obclavate, 0.5–0.7 mm long, the filament 4 mm long; stigma branches 2. Fructification biconvex, obovoid, 3.0–3.1 × 2.1 mm, constricted at the apex, the base obtusoid; greenish to plumbeous and reddish dotted, slightly wrinkled. [details]
Taxonomic remark Source in seed data: wcs Updated namePublishedIn from Feddes Repert. 113: 265 2002 to Feddes Repert. 113(3-4): 265 (2002)....
Taxonomic remark Source in seed data: wcs Updated namePublishedIn from Feddes Repert. 113: 265 2002 to Feddes Repert. 113(3-4): 265 (2002). , according to IPNI. Information provided by Alan E. on email Jul. 15 2020. More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Hypolytrum glomerulatum M.Alves & W.W.Thomas. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1678859 on 2026-09-20
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
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 Herbs robust, 0.8–0.9 m tall, rhizomatous, caespitose, perennial. Rhizome long creeping, 1.0–1.5 cm diam. Pseudoculm trigonous. Cataphylls brown, fibrous. Leaves basal; leaf blades linear, 1.0–1.1 m × 3.0–3.2 cm, arching, green, non-bullate, coriaceous, 3-costate with the secondary costae distinct, inverse W-shaped in cross-section, the margins and midrib scabrous, the apex acute; pseudopetiole absent; sheath margins 7–8 mm wide, brown, membranaceous. Culm 1 per plant, scapiform, central, erect, 0.7–0.9 m × 3.5–4.5 mm, trigonous, scabrous on angles, leafy; bract subtending the synflorescence foliaceous, linear, 50–58 cm long, surpassing the synflorescence; pseudopetiole absent. Synflorescence terminal, paniculiform, somewhat cylindric, lax, the main axis 8–12 cm long, branched, nodes 5–6, the 1st internode 2.2–5.5 cm long, the 2nd internode 2.5–2.8 cm long, the paraclades 6–9 on the basal node, patent to reflexed, the 2nd order ramification present and unbranched, the main epipodium 2.8–3.0 cm long, faintly scabrous; the prophylls faintly bikeeled. Spikes in terminal clusters, sessile, ellipsoid, 2–3 mm long; spicoid bracts 1.5–1.8 mm long, brown, the apex acute, the margins membranaceous; floral bracts 2, partly connate, apex often lacerate, 1.5–2 mm long, the keel wingless, faintly scabridulous. Staminate flowers 2 per spicoid, the anther obclavate, 0.5–0.7 mm long, the filament 4 mm long; stigma branches 2. Fructification biconvex, obovoid, 3.0–3.1 × 2.1 mm, constricted at the apex, the base obtusoid; greenish to plumbeous and reddish dotted, slightly wrinkled. [details]Taxonomic remark Source in seed data: wcs Updated namePublishedIn from Feddes Repert. 113: 265 2002 to Feddes Repert. 113(3-4): 265 (2002). , according to IPNI. Information provided by Alan E. on email Jul. 15 2020. More details could be found in [details]
To International Plant Names Index (IPNI)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Hypolytrum glomerulatum K000584386 isotype 1)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Hypolytrum glomerulatum K000584386 isotype 1)
From editor or global species database
Hosted externally
