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Hydrocotyle sibthorpioides Lam.
Family Araliaceae
Hydrocotyle sibthorpioides Lam. APNI*

Synonyms: Hydrocotyle peduncularis R.Br. ex A.Rich. APNI*

Description: Slender herb, with creeping stems below or above ground in litter, mostly glabrous; aerial stems arising from nodes of creeping stems, occasionally mat-forming.

Leaves circular, cordate or reniform, usually 5–12 mm diam., margins entire or shallowly or rarely deeply lobed, crenate, both surfaces ± sparsely hispid; petiole 2–4 times longer than lamina, hispid towards apex; stipules broad, scarious and overlapping.

Umbels head-like, < 12-flowered, 2–5 mm diam.; flowers bisexual, sessile or very shortly pedicellate; peduncle 10–50 mm long.

Fruit c. 1 mm long and wide, mericarps with prominent dorsal and prominent curved intermediate ribs with a row of tubercular hairs between.


Flowering: spring–autumn.

Distribution and occurrence: Grows in sclerophyll forest on wet sand or clay, weed of gardens.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS
Other Australian states: Qld Vic. Tas.
AVH map***

This species is currently under revison and may contain more enties. Formerly in Apiaceae. May be confused with Hydrocotyle hirta and Hydrocotyle algida. Hydrocotyle sibthorpioides usually differs by having a glabrous or glabrescent adaxial leaf surface, and by often having a 'frill' of long deflexed hairs just below the leaf lamina.

Text by S. M. Hastings & B. M. Wiecek; updated S.F. McCune Jan 2023.
Taxon concept: Flora of NSW 3 (1992)

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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