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Bolboschoenus medianus (V.J.Cook) Sojak
Family Cyperaceae
Bolboschoenus medianus (V.J.Cook) Sojak APNI*

Synonyms: Scirpus medianus V.J.Cook APNI*

Description: Rhizomatous perennial.

Culms 70–150 cm high, 4–5 mm diam., scabrid on the angles above.

Leaves 6–8 mm wide. Inflorescence with 4–6 branches 2–10 cm long, bearing clusters of 1–6 spikelets; involucral bracts 15–25 cm long. Spikelets 1–1.5 (-2) cm long. Glumes c. 7 mm long (plus mucro c. 2 mm long), yellow-brown. Hypogynous bristles no more than two-thirds as long as nut, often deciduous. Style 2- or 3-fid.

Nut plano-convex or trigonous with concave faces, 3–4 mm long, 2–2.5 mm diam., shining, mostly not obviously reticulate.

Other photo
Photo Karen L Wilson


Flowering: spring–summer.

Distribution and occurrence: Grows in swamps and around waterholes; scattered, south from Moree and Narromine.
NSW subdivisions: NC, CC, NWS, ST, CWS, NWP, SWP, NFWP, SFWP
Other Australian states: Vic. Tas. S.A.
AVH map***

Differs from the other species in its unequally trigonous nut and style varying from 2-fid to 3-fid in the one inflorescence. Vegetatively, very similar to B. fluviatilis.

Text by K. L. Wilson (1993); edited KL Wilson (Sept 2008)
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.
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