Common name: Obcordate-leafed Zieria
Zieria obcordata A.Cunn. APNI* Synonyms: Zieria obcordata subsp. A sensu Jacobs & Pickard (1981) A.Cunn. APNI*
Description: Spreading to prostrate shrub to 0.5 m high; branches smooth or slightly to prominently glandular–tuberculate, pubescent with simple hairs, glabrescent.
Leaves trifoliolate; petiole 1.5–3.5 mm long, pilose, glandular tuberculate; central leaflet Leaves trifoliolate; petiole 1.5–3.5 mm long, pilose, glandular tuberculate; central leaflet cuneate–obovate, 2–9 mm long, 1.5– 5 mm wide, margins glandular crenulate and slightly undulate, flat to recurved, apex rounded to obcordate; adaxial surface slightly glandular–verrucose, sometimes only near margins, hirsute; abaxial surface not glandular–verrucose on lamina, hirsute, midrib slightly raised, hirsute, glandular– verrucose, sometimes sparsely so, secondary venation obscure; lateral leaflets similar to terminal leaflets and slightly shorter to slightly longer.
Inflorescence shorter than leaves, 1–3-flowered. Sepals 0.75–1.5 mm long and wide, deltate, slightly glandular–verrucose, hirsute abaxially. Petals valvate, 1.0–2.5(–4) mm long, very pale pink to creamy white, deciduous with fruit, adaxial surface with few hairs or glabrous, abaxial surface pilose.
Cocci not apiculate, not glandular–verrucose though glandular or glandular– verrucose with large hemispherical glands, pubescent, 2.5– 4 mm long, 2–2.5 mm wide.
Flowering: spring.
Distribution and occurrence: Near Wellington and Bathurst. Grows in previously cleared areas in Eucalyptus and Callitris woodland and shrubland on granitic hillsides with a weedy understory of herbs and grasses.
NSW subdivisions: CT, CWS
Threatened species: NSW BCA: Endangered; Commonwealth EPBC: Endangered
Text by E.S.McMaster and M.F. Duretto Taxon concept: McMaster et al. (2025) Aust. Syst. Bot. 38, SB24034. doi.org/10.1071/SB24034
Taxa not yet included in identification key
Zieria obcordata subsp. obcordata,
Zieria obcordata subsp. wuuluman
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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