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.
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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