Cyperaceae taxon details
Rhynchospora croydonensis R.Booth
1679552 (urn:lsid:marinespecies.org:taxname:1679552)
accepted
Species
terrestrial
Booth, R. (2015). Rhynchospora croydonensis R.Booth (Cyperaceae), a new species from northern Queensland. <em>Austrobaileya.</em> 9(3): 416-420., available online at https://www.biodiversitylibrary.org/page/59885809#page/99/mode/1up
page(s): 417 [details]
page(s): 417 [details]
Holotype BRI Rhynchospora croydonensis,...
Holotype BRI Rhynchospora croydonensis, verbatimGeounit 6.5 km along Coralie... [details]
Description Annual or short lived perennial 20-45 cm tall; culms tufted, 3-angled, trigonous, striate, 0.6-1.3 mm wide, glabrous....
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Austrobaileya 9(3): 417. 2015 to Austrobaileya 9: 417 (2015),...
Description Annual or short lived perennial 20-45 cm tall; culms tufted, 3-angled, trigonous, striate, 0.6-1.3 mm wide, glabrous. Lamina flat or conduplicate, 1-3 mm wide with long ciliate hairs when young, glabrescent. Ligule membranous. Involucral bracts ciliate on the margins, longer than the inflorescence. Inflorescence a single dense head, 1.2-1.5 cm long by 2-2.5 cm wide. Spikelets lanceolate or linear-lanceolate, 7.5-10 mm long, pale brown to brown. Perianth present as 6 hypogynous bristles, unequal in length, longer than the nut and style base, antrorsely scabrid, plumose at the base, glabrous above. Glumes distichous,6-7, narrowly ovate or ovate-lanceolate, 2-10 mm long, 1.2-1.8 mm wide, coloured straw or light brown to brown, glabrous, keeled or with the midrib distinct, not nerved; apex acute; margin glabrous; rachilla wingless. Style deciduous, entire, glabrous. Achene with a persistent style base, not grooved, 2.4-3 mm long, as broad or broader than the achene and longer than, or equalling the achene; margins winged, setulose; stramineous, or yellow- brown. Achene obovoid, biconvex, lenticular, or concave-convex; 2.2-3 mm long, 1.3-1.6 mm wide, not ribbed; surface smooth or with a faint cell pattern, with hispid hairs mainly in the distal half, pilose hairs only at the base of the achene. [details]
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Austrobaileya 9(3): 417. 2015 to Austrobaileya 9: 417 (2015),...
Taxonomic remark Source in seed data: ipni Update namepublishedIn from Austrobaileya 9(3): 417. 2015 to Austrobaileya 9: 417 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Rhynchospora croydonensis R.Booth. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1679552 on 2025-09-11
Date
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by
2024-12-10 11:47:54Z
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Nomenclature
original description
Booth, R. (2015). Rhynchospora croydonensis R.Booth (Cyperaceae), a new species from northern Queensland. <em>Austrobaileya.</em> 9(3): 416-420., available online at https://www.biodiversitylibrary.org/page/59885809#page/99/mode/1up
page(s): 417 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 417 [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 BRI Rhynchospora croydonensis, verbatimGeounit 6.5 km along Coralie... [details]
From editor or global species database
Description Annual or short lived perennial 20-45 cm tall; culms tufted, 3-angled, trigonous, striate, 0.6-1.3 mm wide, glabrous. Lamina flat or conduplicate, 1-3 mm wide with long ciliate hairs when young, glabrescent. Ligule membranous. Involucral bracts ciliate on the margins, longer than the inflorescence. Inflorescence a single dense head, 1.2-1.5 cm long by 2-2.5 cm wide. Spikelets lanceolate or linear-lanceolate, 7.5-10 mm long, pale brown to brown. Perianth present as 6 hypogynous bristles, unequal in length, longer than the nut and style base, antrorsely scabrid, plumose at the base, glabrous above. Glumes distichous,6-7, narrowly ovate or ovate-lanceolate, 2-10 mm long, 1.2-1.8 mm wide, coloured straw or light brown to brown, glabrous, keeled or with the midrib distinct, not nerved; apex acute; margin glabrous; rachilla wingless. Style deciduous, entire, glabrous. Achene with a persistent style base, not grooved, 2.4-3 mm long, as broad or broader than the achene and longer than, or equalling the achene; margins winged, setulose; stramineous, or yellow- brown. Achene obovoid, biconvex, lenticular, or concave-convex; 2.2-3 mm long, 1.3-1.6 mm wide, not ribbed; surface smooth or with a faint cell pattern, with hispid hairs mainly in the distal half, pilose hairs only at the base of the achene. [details]Taxonomic remark Source in seed data: ipni Update namepublishedIn from Austrobaileya 9(3): 417. 2015 to Austrobaileya 9: 417 (2015), information provided by Alan E. on email Jun. 07 2021 [details]
