Cyperaceae taxon details
Costularia andringitrensis Larridon
1680453 (urn:lsid:marinespecies.org:taxname:1680453)
accepted
Species
terrestrial
Larridon, I.; Rabarivola, L.; Xanthos, M.; Muasya, A. M. (2019). Revision of the Afro-Madagascan genus <i>Costularia</i> (Schoeneae, Cyperaceae): infrageneric relationships and species delimitation. <em>PeerJ.</em> 7: e6528., available online at https://doi.org/10.7717/peerj.6528
page(s): 10 [details] Available for editors
[request]
page(s): 10 [details] Available for editors
[request]
Holotype TAN, geounit Madagascar
Holotype TAN, geounit Madagascar [details]
Description Small perennial herb, flowering culm up to 24 cm, scarcely exceeding the leaves. Caudex absent. Culm (excluding the...
Distribution The species is only known from south-central Madagascar, where it was found in the Andringitra National Park, Haute...
Description Small perennial herb, flowering culm up to 24 cm, scarcely exceeding the leaves. Caudex absent. Culm (excluding the inflorescence) short and slender, 5–7.2 cm × 1.1–1.2 mm. Basal leaves distichous, bases of old burnt leaves can be present; leaf sheaths 1.5–2 cm × up to 4 mm, only slightly wider than the leaf blade, indistinct, straw-coloured to green; leaf blades linear, flat, 8–34 cm × 1.2–2.6 mm, margins scabrid. Cauline leaves absent. Inflorescence a contracted panicle, 12–19 × 0.5 cm, composed of few to several spikelets; inflorescence bracts 6, unequal, sheathing, dark reddish brown, margins scabrid; longest bract 12.5–15 cm × 2.5 mm. Peduncles unequal, up to 2.6 cm long, margins smooth to scabrid. Pedicels of the spikelets unequal, one to five mm long, minutely papilose, margins scabrid. Spikelets lanceolate, (4–)5–5.5 × 1.1–2 mm, dark purple. Glumes distichous, narrowly ovate, boatshaped, acuminate (upper glumes) to long mucronate (up to c. one mm, lower glumes), 3–4 × 1.5–2 mm, dark purple on upper part including mucro if present and pale brown on lower part, margins scabrid; three lower glumes empty, two upper glumes fertile. Flowers 2, lower male, upper bisexual. Perianth bristles 6, pale, thin, antrorsely ciliate, up to 13 mm long. Stamens 3. Style deeply trifid. Immature nutlet rounded trigonous with distinct bulbous style base remaining; ripe nutlets not studied as they were already shed from plants in all available specimens. [details]
Distribution The species is only known from south-central Madagascar, where it was found in the Andringitra National Park, Haute...
Distribution The species is only known from south-central Madagascar, where it was found in the Andringitra National Park, Haute Matsiatra region, Fianarantsoa province. [details]
Cyperaceae Working Group (2024). [see How to cite]. Global Cyperaceae Database. Costularia andringitrensis Larridon. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680453 on 2025-02-06
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2024-12-10 11:47:54Z
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original description
Larridon, I.; Rabarivola, L.; Xanthos, M.; Muasya, A. M. (2019). Revision of the Afro-Madagascan genus <i>Costularia</i> (Schoeneae, Cyperaceae): infrageneric relationships and species delimitation. <em>PeerJ.</em> 7: e6528., available online at https://doi.org/10.7717/peerj.6528
page(s): 10 [details] Available for editors [request]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 10 [details] Available for editors
[request]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
Holotype TAN, geounit Madagascar [details]
From editor or global species database
Description Small perennial herb, flowering culm up to 24 cm, scarcely exceeding the leaves. Caudex absent. Culm (excluding the inflorescence) short and slender, 5–7.2 cm × 1.1–1.2 mm. Basal leaves distichous, bases of old burnt leaves can be present; leaf sheaths 1.5–2 cm × up to 4 mm, only slightly wider than the leaf blade, indistinct, straw-coloured to green; leaf blades linear, flat, 8–34 cm × 1.2–2.6 mm, margins scabrid. Cauline leaves absent. Inflorescence a contracted panicle, 12–19 × 0.5 cm, composed of few to several spikelets; inflorescence bracts 6, unequal, sheathing, dark reddish brown, margins scabrid; longest bract 12.5–15 cm × 2.5 mm. Peduncles unequal, up to 2.6 cm long, margins smooth to scabrid. Pedicels of the spikelets unequal, one to five mm long, minutely papilose, margins scabrid. Spikelets lanceolate, (4–)5–5.5 × 1.1–2 mm, dark purple. Glumes distichous, narrowly ovate, boatshaped, acuminate (upper glumes) to long mucronate (up to c. one mm, lower glumes), 3–4 × 1.5–2 mm, dark purple on upper part including mucro if present and pale brown on lower part, margins scabrid; three lower glumes empty, two upper glumes fertile. Flowers 2, lower male, upper bisexual. Perianth bristles 6, pale, thin, antrorsely ciliate, up to 13 mm long. Stamens 3. Style deeply trifid. Immature nutlet rounded trigonous with distinct bulbous style base remaining; ripe nutlets not studied as they were already shed from plants in all available specimens. [details]Distribution The species is only known from south-central Madagascar, where it was found in the Andringitra National Park, Haute Matsiatra region, Fianarantsoa province. [details]
Ecology This species is found in near rocks in grassland to ericoid shrubland vegetation at 2,000–2,500 m in elevation.
Immature inflorescence observed in November, while the specimen collected in April had already shed its ripe nutlets. [details]
