PlantNET Home DONATE TODAY | PlantNET Home | Search NSW Flora | Contact Us  
FloraOnline
Introduction
Plant Name Search
Index Search
Spatial Search
Identification Keys
Classification
Glossary
WeedAlert
Telopea Journal
Other Data Sources
NEW SOUTH WALES FLORA ONLINE Printable Page

Cyperus rigens J.Presl & C.Presl
Family Cyperaceae
Cyperus rigens J.Presl & C.Presl APNI*

Synonyms: Cyperus oostachyus Nees APNI*
Mariscus rigens (C.Presl) C.B.Clarke APNI*

Description: Tufted perennial with short thick rhizome.

Culms triquetrous, smooth or scabrous above, slightly swollen at base, 50–100 cm high, 2–3 mm diam.

Leaves not septate-nodulose, shorter than culms, to 8 mm wide. Inflorescence head-like or simple with 4–7 branches to 10 cm long; spikes ovoid, 1.5–2.5 cm long, to 3 cm diam.; involucral bracts leaf-like, 2–5 longer than inflorescence. Spikelets flattened, numerous per spike, 6–15 mm long, 2–2.5 mm wide in side view, 7–10-flowered; rachilla ± narrowly winged; spikelet falling as unit. Glumes acute, with sides 2- or 3-nerved near midrib, 3–3.5 mm long, whitish to pale brown. Stamens 3. Style 3-fid.

Nut trigonous, obovoid to ellipsoid, less than half as long as glume, c. 1.5 mm long, c. 0.7 mm diam., dark red-brown.


Herbarium
Sheet

Herbarium
Sheet

Flowering: spring–summer.

Distribution and occurrence: Naturalized in the lower Blue Mtns. Native of S Amer.
NSW subdivisions: *CC, *CT
AVH map***

Text by K. L. Wilson
Taxon concept: Flora of NSW 4 (1993)


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
  Privacy | Copyright | Disclaimer | About PlantNET | Cite PlantNET