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Gonocarpus micranthus Thunb.
Family Haloragaceae
Gonocarpus micranthus Thunb. APNI*

Description: Prostrate, ascending or erect, much-branched herb; stems terete, glabrous or rarely with a few scattered hairs.

Leaves decussate, ovate to circular, 4–15 mm long, 3–11 mm wide, base rounded or cordate, margins thickened, toothed with many small teeth, ± glabrous; shortly petiolate.

Petals 0.8–1.5 mm long, reddish.

Fruit obovoid, up to 1 mm long, reddish to grey, 8-ribbed, smooth.


Distribution and occurrence: in heath and swampy areas, extending into open sclerophyll forest on damp sandy soils.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, SWS
Other Australian states: Qld Vic. Tas. S.A.
AVH map***

Text by Peter G. Wilson
Taxon concept:

 Key to the subspecies 
1Inflorescences narrow, unbranched or branching only to the second order; plants usually prostrate, up to 10 cm high; leaves <8 mm longsubsp. micranthus
Inflorescences diffuse, branching to the third or fourth order; plants erect, 25–60 cm high; leaves >8 mm longsubsp. ramosissimus

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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