Cyperaceae taxon details
Hypolytrum hainanense (Merr.) Tang & F.T.Wang
1678861 (urn:lsid:marinespecies.org:taxname:1678861)
accepted
Species
Hypolytrum latifolium Boeckeler · unaccepted
Mapania hainanensis Merr. · unaccepted
terrestrial
Not documented
Description Roots fibrous. Rhizomes stout, woody. Culms lateral, 30-40 cm tall, 3-angled, basally with several scales and bladeless...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Fl. Reipubl. Popularis Sin. xi. 201 (1961). to Fl. Reipubl. Popularis...
Description Roots fibrous. Rhizomes stout, woody. Culms lateral, 30-40 cm tall, 3-angled, basally with several scales and bladeless sheaths. Basal scales broadly ovate. Bladeless sheaths dark grayish brown, densely spirally arranged. Leaves basal, tufted; leaf sheath reddish, to 14 cm, not closed, slightly folded, smooth, margin thickly membranous; leaf blade flat, ca. 1 m × 1-1.8 cm, apically gradually narrowed, papery, glabrous, margin and abaxial midvein serrulate. Involucral bracts 2 or 3, leaflike, 1.5-5 cm, slightly longer than inflorescence; basalmost bract sheathing. Inflorescence a corymbose panicle congested into a head, 1.3-2 × 1.5-2.5 cm, with many spikes. Spikes narrowly ellipsoid, becoming globose in fruit, 5-6 mm in diam., with many glumelike bracts and pseudospikelets. Glumelike bracts yellowish brown, spirally and imbricately arranged, oblong-obovate, 2.5-3 mm, leathery, punctate, keeled, each subtending a pseudospikelet. Pseudospikelets ca. 2 mm, with 2 glumes, 2 male flowers, and 1 female flower; glumes dark grayish brown, lateral and opposite, narrowly elliptic and cymbiform, ca. 2.5 mm, keeled, membranous, connate on adaxial side, spinulose on keel, each with a male flower. Anther narrowly oblong; connective apex not prominent beyond anther. Stigmas 2. Nutlet dark grayish brown, broadly obovoid to ovoid, ca. 3 mm, biconvex, irregularly longitudinally rugose, apex with a conic beak. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Fl. Reipubl. Popularis Sin. xi. 201 (1961). to Fl. Reipubl. Popularis...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Fl. Reipubl. Popularis Sin. xi. 201 (1961). to Fl. Reipubl. Popularis Sin. 11: 201 (1961), 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. Hypolytrum hainanense (Merr.) Tang & F.T.Wang. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1678861 on 2026-09-15
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]
Other
additional source
Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. <em>Biodiversity Science.</em> 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors 
[request]
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Roots fibrous. Rhizomes stout, woody. Culms lateral, 30-40 cm tall, 3-angled, basally with several scales and bladeless sheaths. Basal scales broadly ovate. Bladeless sheaths dark grayish brown, densely spirally arranged. Leaves basal, tufted; leaf sheath reddish, to 14 cm, not closed, slightly folded, smooth, margin thickly membranous; leaf blade flat, ca. 1 m × 1-1.8 cm, apically gradually narrowed, papery, glabrous, margin and abaxial midvein serrulate. Involucral bracts 2 or 3, leaflike, 1.5-5 cm, slightly longer than inflorescence; basalmost bract sheathing. Inflorescence a corymbose panicle congested into a head, 1.3-2 × 1.5-2.5 cm, with many spikes. Spikes narrowly ellipsoid, becoming globose in fruit, 5-6 mm in diam., with many glumelike bracts and pseudospikelets. Glumelike bracts yellowish brown, spirally and imbricately arranged, oblong-obovate, 2.5-3 mm, leathery, punctate, keeled, each subtending a pseudospikelet. Pseudospikelets ca. 2 mm, with 2 glumes, 2 male flowers, and 1 female flower; glumes dark grayish brown, lateral and opposite, narrowly elliptic and cymbiform, ca. 2.5 mm, keeled, membranous, connate on adaxial side, spinulose on keel, each with a male flower. Anther narrowly oblong; connective apex not prominent beyond anther. Stigmas 2. Nutlet dark grayish brown, broadly obovoid to ovoid, ca. 3 mm, biconvex, irregularly longitudinally rugose, apex with a conic beak. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Fl. Reipubl. Popularis Sin. xi. 201 (1961). to Fl. Reipubl. Popularis Sin. 11: 201 (1961), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (1 publication) (from synonym Mapania hainanensis Merr.)
To Biodiversity Heritage Library (96 publications) (from synonym Hypolytrum latifolium Boeckeler)
To International Plant Names Index (IPNI) (from synonym Mapania hainanensis Merr.)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Hypolytrum latifolium Boeckeler)
To Plants of the World Online
To Plants of the World Online (from synonym Mapania hainanensis Merr.)
To Royal Botanic Gardens, Kew (Hypolytrum hainanense K000960214 type 1)
To The Plant List (from synonym Hypolytrum latifolium Boeckeler)
To US Herbarium (Mapania hainanensis US2333921 type 1) (from synonym Mapania hainanensis Merr.)
To Biodiversity Heritage Library (96 publications) (from synonym Hypolytrum latifolium Boeckeler)
To International Plant Names Index (IPNI) (from synonym Mapania hainanensis Merr.)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Hypolytrum latifolium Boeckeler)
To Plants of the World Online
To Plants of the World Online (from synonym Mapania hainanensis Merr.)
To Royal Botanic Gardens, Kew (Hypolytrum hainanense K000960214 type 1)
To The Plant List (from synonym Hypolytrum latifolium Boeckeler)
To US Herbarium (Mapania hainanensis US2333921 type 1) (from synonym Mapania hainanensis Merr.)
From editor or global species database
Hosted externally
Hosted externally, from synonym
