Cyperaceae name details
Tricostularia undulata (Thwaites) J.Kern
1683390 (urn:lsid:marinespecies.org:taxname:1683390)
unaccepted
Species
recent only
(of Cladium undulatum Thwaites) Thwaites, G. H. K.; Hooker, J. D. (eds). (1858-1864). Enumeratio plantarum Zeylaniae: An enumeration of Ceylon plants, with descriptions of the new and little known genera and species, observations on their habitats, uses, native names, etc. Parts 1-5., available online at https://www.biodiversitylibrary.org/page/528363#page/1/mode/1up
page(s): 353 [details]
page(s): 353 [details]
Description Herbs, tussock-forming. Roots thick. Culms 30-90 cm tall, 1-2 mm thick, rigid, obtusely 3-angled, sulcate-striate, smooth....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Acta Bot. Neerl. 8: 267 1959 to Acta Bot. Neerl. 8: 267 (1959),...
Description Herbs, tussock-forming. Roots thick. Culms 30-90 cm tall, 1-2 mm thick, rigid, obtusely 3-angled, sulcate-striate, smooth. Leaves basal, shorter than to as long as culm; leaf blade 1-3 mm wide, rigid, margin involute and scabrous. Inflorescences paniculate, branched, diffuse to dense, consisting of 4 or 5 fascicles; branches 2 or 3 together, unequal, ± exserted from sheath, compressed, rigid, flexuose, scabrous. Spikelets almost sessile, in clusters of 2-8, 1-flowered. Glumes 4, oblong-lanceolate, apex acute; basal 2 glumes ca. 2 mm, apical ones 4-5 mm. Perianth scales 6, lanceolate to linear-lanceolate, densely covered with white antrorse short hairs. Stamens 3; anthers ca. 2 mm; connective apex 3-sided, oblong. Nutlet chestnut-brown to blackish, obtusely 3-sided, slightly reticulate-rugulose, with 3 whitish ribs, apex hispidulous. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Acta Bot. Neerl. 8: 267 1959 to Acta Bot. Neerl. 8: 267 (1959),...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Acta Bot. Neerl. 8: 267 1959 to Acta Bot. Neerl. 8: 267 (1959), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2026). [see How to cite]. Global Cyperaceae Database. Tricostularia undulata (Thwaites) J.Kern. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1683390 on 2026-06-30
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Nomenclature
original description
(of Cladium undulatum Thwaites) Thwaites, G. H. K.; Hooker, J. D. (eds). (1858-1864). Enumeratio plantarum Zeylaniae: An enumeration of Ceylon plants, with descriptions of the new and little known genera and species, observations on their habitats, uses, native names, etc. Parts 1-5., available online at https://www.biodiversitylibrary.org/page/528363#page/1/mode/1up
page(s): 353 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
new combination reference Kern, J. H. (1959). Florae Malesianae Precursores XXII, Cladium and Machaerina (Cyperaceae). Acta Botanica Neerlandica, 8(3): 263-268., available online at https://doi.org/10.1111/j.1438-8677.1959.tb00537.x
page(s): 267 [details]
page(s): 353 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
new combination reference Kern, J. H. (1959). Florae Malesianae Precursores XXII, Cladium and Machaerina (Cyperaceae). Acta Botanica Neerlandica, 8(3): 263-268., available online at https://doi.org/10.1111/j.1438-8677.1959.tb00537.x
page(s): 267 [details]
From editor or global species database
Description Herbs, tussock-forming. Roots thick. Culms 30-90 cm tall, 1-2 mm thick, rigid, obtusely 3-angled, sulcate-striate, smooth. Leaves basal, shorter than to as long as culm; leaf blade 1-3 mm wide, rigid, margin involute and scabrous. Inflorescences paniculate, branched, diffuse to dense, consisting of 4 or 5 fascicles; branches 2 or 3 together, unequal, ± exserted from sheath, compressed, rigid, flexuose, scabrous. Spikelets almost sessile, in clusters of 2-8, 1-flowered. Glumes 4, oblong-lanceolate, apex acute; basal 2 glumes ca. 2 mm, apical ones 4-5 mm. Perianth scales 6, lanceolate to linear-lanceolate, densely covered with white antrorse short hairs. Stamens 3; anthers ca. 2 mm; connective apex 3-sided, oblong. Nutlet chestnut-brown to blackish, obtusely 3-sided, slightly reticulate-rugulose, with 3 whitish ribs, apex hispidulous. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Acta Bot. Neerl. 8: 267 1959 to Acta Bot. Neerl. 8: 267 (1959), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
