Cyperaceae taxon details
Costularia humbertii Bosser
1680456 (urn:lsid:marinespecies.org:taxname:1680456)
accepted
Species
terrestrial
Bosser, J.M. (1955). Contribution à l'étude des Cyperaceae de Madagascar. <em>Naturaliste Malgache.</em> 7: 121-126.
page(s): 121 [details]
page(s): 121 [details]
Lectotype P 00459980, geounit Madagascar
Lectotype P 00459980, geounit Madagascar [details]
Description Robust perennial herb: Caudex robust, 5–10 cm × 1–2 cm. Culm 30–70 cm × 2–3 mm, compressed, smooth. Basal leaves...
Distribution Endemic to the Antsiranana province of Madagascar where it is restricted to the high-elevation zone of the Marojejy...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Naturaliste Malgache vii. 121 (1955). to Naturaliste Malgache 7: 121...
Description Robust perennial herb: Caudex robust, 5–10 cm × 1–2 cm. Culm 30–70 cm × 2–3 mm, compressed, smooth. Basal leaves distichous, flabellately arranged; leaf sheaths densely imbricate, two to three cm long, reddish brown to chestnut coloured; leaf blades leathery, falciform (sickle-shaped), flat, canaliculate, pale green, minutely papillose above, 7–15 cm × 5–8 mm, much shorter than the culm, apex subacute to rounded-obtuse, margins scabrid. Cauline leaves 1–3, sheathing. Inflorescence a somewhat lax and compound panicle, foliate, 15–25 cm long, composed of five to seven erect to flexuous fascicles. Peduncles unequal, at most seven cm long, margins scabrid, papillose above. Pedicels of the spikelets one to four mm long, green. Spikelets lanceolate, 5–7.5 mm long, dark purple. Glumes 4–6, ovate, distichous, 1-veined, 4–5 × 1 mm, margins minutely ciliolate, keel somewhat scabrid, apex acute to mucronate, two to four lower glumes empty, two upper glumes fertile. Flowers 2, lower male, upper bisexual. Perianth bristles 6, longer than the nutlet, shortly ciliate. Stamens 3, anthers long and linear, apiculate, three mm long. Style deeply trifid. Nutlet 2.5 mm long, smooth, castaneous, trigonous, base attenuate, beak pale, one mm, ciliolate. [details]
Distribution Endemic to the Antsiranana province of Madagascar where it is restricted to the high-elevation zone of the Marojejy...
Distribution Endemic to the Antsiranana province of Madagascar where it is restricted to the high-elevation zone of the Marojejy National Park. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Naturaliste Malgache vii. 121 (1955). to Naturaliste Malgache 7: 121...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Naturaliste Malgache vii. 121 (1955). to Naturaliste Malgache 7: 121 (1955), 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. Costularia humbertii Bosser. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1680456 on 2025-04-20
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
Bosser, J.M. (1955). Contribution à l'étude des Cyperaceae de Madagascar. <em>Naturaliste Malgache.</em> 7: 121-126.
page(s): 121 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 121 [details]
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
Lectotype P 00459980, geounit Madagascar [details]
From editor or global species database
Description Robust perennial herb: Caudex robust, 5–10 cm × 1–2 cm. Culm 30–70 cm × 2–3 mm, compressed, smooth. Basal leaves distichous, flabellately arranged; leaf sheaths densely imbricate, two to three cm long, reddish brown to chestnut coloured; leaf blades leathery, falciform (sickle-shaped), flat, canaliculate, pale green, minutely papillose above, 7–15 cm × 5–8 mm, much shorter than the culm, apex subacute to rounded-obtuse, margins scabrid. Cauline leaves 1–3, sheathing. Inflorescence a somewhat lax and compound panicle, foliate, 15–25 cm long, composed of five to seven erect to flexuous fascicles. Peduncles unequal, at most seven cm long, margins scabrid, papillose above. Pedicels of the spikelets one to four mm long, green. Spikelets lanceolate, 5–7.5 mm long, dark purple. Glumes 4–6, ovate, distichous, 1-veined, 4–5 × 1 mm, margins minutely ciliolate, keel somewhat scabrid, apex acute to mucronate, two to four lower glumes empty, two upper glumes fertile. Flowers 2, lower male, upper bisexual. Perianth bristles 6, longer than the nutlet, shortly ciliate. Stamens 3, anthers long and linear, apiculate, three mm long. Style deeply trifid. Nutlet 2.5 mm long, smooth, castaneous, trigonous, base attenuate, beak pale, one mm, ciliolate. [details]Distribution Endemic to the Antsiranana province of Madagascar where it is restricted to the high-elevation zone of the Marojejy National Park. [details]
Ecology Found growing in swamps in high elevation ericoid vegetation, and on gneiss and quartzite rocks of the mountain ridge, at elevations of 1,400–2,200 m.
Flowering specimens were collected from March to early April. Young inflorescences can be observed on the specimens collected in November–December. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Naturaliste Malgache vii. 121 (1955). to Naturaliste Malgache 7: 121 (1955), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (1 publication)
To European Nucleotide Archive, ENA (Costularia humbertii)
To GenBank (1 nucleotides; 0 proteins)
To Genève Herbarium (Costularia humbertii G00406272 isotype 1)
To International Plant Names Index (IPNI)
To IUCN Red List (Critically Endangered)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459978 isolectotype 1)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459979 isolectotype 2)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459980 lectotype 1)
To Plants of the World Online
To European Nucleotide Archive, ENA (Costularia humbertii)
To GenBank (1 nucleotides; 0 proteins)
To Genève Herbarium (Costularia humbertii G00406272 isotype 1)
To International Plant Names Index (IPNI)
To IUCN Red List (Critically Endangered)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459978 isolectotype 1)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459979 isolectotype 2)
To Muséum National d'Histoire Naturelle, Paris (Costularia humbertii P00459980 lectotype 1)
To Plants of the World Online
