Cyperaceae taxon details
Caustis gigas Meney & K.W.Dixon ex R.L.Barrett
1680405 (urn:lsid:marinespecies.org:taxname:1680405)
accepted
Species
recent only
Barrett, R. L.; Barrett, M. D. (2015). Twenty-seven new species of vascular plants from Western Australia. Nuytsia, 26: 21-88., available online at https://www.biodiversitylibrary.org/page/60511786#page/27/mode/1up
page(s): 34 [details]
page(s): 34 [details]
Holotype PERTH
01278274, geounit Western Australia
01278274, geounit Western Australia
Holotype PERTH
01278274, geounit Western Australia [details]
01278274, geounit Western Australia [details]
Description Rhizomatous perennial; rhizome scales dark brown. Culms rigidly erect, smooth, distinctly grooved on one side, with 5–15+...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 34. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 34...
Description Rhizomatous perennial; rhizome scales dark brown. Culms rigidly erect, smooth, distinctly grooved on one side, with 5–15+ nodes, 0.7–2.5 m tall, the primary culms 2.2–5.0 mm diam., finely ciliate towards nodes, densely so in groove, glabrescent; infertile nodes 5–10 per culm, each with 1–3(–4) lateral branches, the ultimate branchlets (sterile pedicels) straight or flexuose, widely spreading, 0.7–1.4 mm diam. Leaves of mature plants reduced to dark brown, many-nerved sheathing scales with acuminate apiculum, 12–42 mm long; sheath margins distinctly long-ciliate; sheath and both surfaces of apiculum densely appressed-puberulous when young, glabrescent outside. Young flowering branches forming a pseudo-raceme of 3–12 spikelets, not contracted (narrow at first, the branches and branchlets greatly expanding), somewhat flexuose. Spikelets 30–300 per inflorescence, 10–16 mm long, 2–5-flowered, bisexual; glumes 5–8, dark brown, with non-opaque margins, long-acuminate, densely appressed- to spreading-hairy all over with spreading ciliate margin. Stamens 3 (but anthesis simultaneous in all flowers, so up to 15 per spikelet); filaments 6.2–7.9 mm long; anthers 5.9–7.7 mm long including apiculum c. 0.5 mm long, c. 0.35 mm diam., reddish brown when dry; pollen triquetrous. Style 3-fid, hairy at base, c. 6.5 mm long, the branches 3.9–4.3 mm long; style base at maturity persistent, spindle-shaped and covered in short, erect hairs. Mature nut obovoid, cream, 8.9–9.8 mm long, 2.6–3.0 mm diam., the perianth forming a small rim fused to base of nut. [details]
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 34. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 34...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 34. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 34 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Caustis gigas Meney & K.W.Dixon ex R.L.Barrett. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680405 on 2026-09-15
Date
action
by
2024-12-10 11:47:54Z
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db_admin
The webpage text is licensed under a Creative Commons
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Nomenclature
original description
Barrett, R. L.; Barrett, M. D. (2015). Twenty-seven new species of vascular plants from Western Australia. Nuytsia, 26: 21-88., available online at https://www.biodiversitylibrary.org/page/60511786#page/27/mode/1up
page(s): 34 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 34 [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
Holotype PERTH
01278274, geounit Western Australia [details]
01278274, geounit Western Australia [details]
From editor or global species database
Description Rhizomatous perennial; rhizome scales dark brown. Culms rigidly erect, smooth, distinctly grooved on one side, with 5–15+ nodes, 0.7–2.5 m tall, the primary culms 2.2–5.0 mm diam., finely ciliate towards nodes, densely so in groove, glabrescent; infertile nodes 5–10 per culm, each with 1–3(–4) lateral branches, the ultimate branchlets (sterile pedicels) straight or flexuose, widely spreading, 0.7–1.4 mm diam. Leaves of mature plants reduced to dark brown, many-nerved sheathing scales with acuminate apiculum, 12–42 mm long; sheath margins distinctly long-ciliate; sheath and both surfaces of apiculum densely appressed-puberulous when young, glabrescent outside. Young flowering branches forming a pseudo-raceme of 3–12 spikelets, not contracted (narrow at first, the branches and branchlets greatly expanding), somewhat flexuose. Spikelets 30–300 per inflorescence, 10–16 mm long, 2–5-flowered, bisexual; glumes 5–8, dark brown, with non-opaque margins, long-acuminate, densely appressed- to spreading-hairy all over with spreading ciliate margin. Stamens 3 (but anthesis simultaneous in all flowers, so up to 15 per spikelet); filaments 6.2–7.9 mm long; anthers 5.9–7.7 mm long including apiculum c. 0.5 mm long, c. 0.35 mm diam., reddish brown when dry; pollen triquetrous. Style 3-fid, hairy at base, c. 6.5 mm long, the branches 3.9–4.3 mm long; style base at maturity persistent, spindle-shaped and covered in short, erect hairs. Mature nut obovoid, cream, 8.9–9.8 mm long, 2.6–3.0 mm diam., the perianth forming a small rim fused to base of nut. [details]Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 34. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 34 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
To Biodiversity Heritage Library (1 publication)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Caustis gigas K000607955 type 1)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Caustis gigas K000607955 type 1)
From editor or global species database
Hosted externally
