Cyperaceae taxon details
Caustis deserti R.L.Barrett
1680402 (urn:lsid:marinespecies.org:taxname:1680402)
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): 33 [details]
page(s): 33 [details]
Holotype PERTH
04241525, geounit Western Australia
04241525, geounit Western Australia
Holotype PERTH
04241525, geounit Western Australia [details]
04241525, geounit Western Australia [details]
Description Rhizomatous perennial; rhizome scales dark brown. Culms rigidly erect, smooth, distinctly grooved on one side, with 5–10...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 33. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 33...
Description Rhizomatous perennial; rhizome scales dark brown. Culms rigidly erect, smooth, distinctly grooved on one side, with 5–10 nodes, 21–38 cm tall, the primary culms 1.6–2.8 mm diam., glabrous; infertile nodes 5–8 per culm, each with 1–5 lateral branches, the ultimate branchlets (sterile pedicels) straight or slightly flexuose, tightly clustered, 0.8–1.5 mm diam. Leaves of mature plants reduced to dark brown, many-nerved sheathing scales with acuminate apiculum, 12–30 mm long; sheath margins very shortly ciliate; sheath and both surfaces of apiculum minutely puberulous when young, glabrescent. Young flowering branches somewhat contracted at first (eventually expanding, but the inflorescence remaining narrow), not or somewhat flexuose. Spikelets 25–46 per inflorescence, 9.5–17.0 mm long, usually 2-flowered, bisexual; glumes 3–5, white or pale to dark brown with opaque margins, long-acuminate, sparsely to densely appressed- to spreading-hairy particularly at base and on margins. Stamens 3 (but anthesis simultaneous in both flowers so 6 per spikelet); filaments 7–9 mm long; anthers 5.3–6.2 mm long including apiculum c. 0.4 mm long, 0.25 mm diam., reddish brown when dry; pollen triquetrous. Style 3-fid, hairy at base, c. 6 mm long, the branches c. 5.5 mm long. Mature nut not seen. [details]
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 33. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 33...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 33. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 33 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Caustis deserti R.L.Barrett. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680402 on 2026-08-23
Date
action
by
2024-12-10 11:47:54Z
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db_admin
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
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): 33 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 33 [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
04241525, geounit Western Australia [details]
04241525, 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 5–10 nodes, 21–38 cm tall, the primary culms 1.6–2.8 mm diam., glabrous; infertile nodes 5–8 per culm, each with 1–5 lateral branches, the ultimate branchlets (sterile pedicels) straight or slightly flexuose, tightly clustered, 0.8–1.5 mm diam. Leaves of mature plants reduced to dark brown, many-nerved sheathing scales with acuminate apiculum, 12–30 mm long; sheath margins very shortly ciliate; sheath and both surfaces of apiculum minutely puberulous when young, glabrescent. Young flowering branches somewhat contracted at first (eventually expanding, but the inflorescence remaining narrow), not or somewhat flexuose. Spikelets 25–46 per inflorescence, 9.5–17.0 mm long, usually 2-flowered, bisexual; glumes 3–5, white or pale to dark brown with opaque margins, long-acuminate, sparsely to densely appressed- to spreading-hairy particularly at base and on margins. Stamens 3 (but anthesis simultaneous in both flowers so 6 per spikelet); filaments 7–9 mm long; anthers 5.3–6.2 mm long including apiculum c. 0.4 mm long, 0.25 mm diam., reddish brown when dry; pollen triquetrous. Style 3-fid, hairy at base, c. 6 mm long, the branches c. 5.5 mm long. Mature nut not seen. [details]Taxonomic remark Source in seed data: ipni Update namepublishedIn from Nuytsia 26: 33. 2015 [3 Nov 2015] [epublished] to Nuytsia 26: 33 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
