Common name: Rock Xanthosia
Xanthosia tridentata DC. APNI*
Description: Erect or ascending subshrub to 30 cm high; branches slender and diffuse, usually 10–20 cm long, hirsute or ± glabrous, younger parts sparsely stellate-hairy.
Leaves cauline, cuneate, 7–23 mm long, 3–15 mm wide, apex 3-notched, base narrowed, margins ± recurved, upper surface glabrous or sparsely hairy, lower surface whitish tomentose.
Inflorescence terminal and leaf-opposed, umbels irregularly compound; mostly 2–6-flowered; peduncles 2.5–12 mm long; bracteoles petaloid, green or green with red tinges, linear to ovate, 3.5–4 mm long. Sepals c. 1.7 mm long, peltate. Petals c. 1 mm long, white. Stylopodium glabrous.
Fruit 3–3.5 mm long, mericarps 9-ribbed.
Flowering: Flowers August–April
Distribution and occurrence: Grows in heath, dry scrub and eucalypt woodland on skeletal sandy soils over sandstone and shale, south from Forster and Mt White.
NSW subdivisions: NC, CC, SC, CT, ST
Other Australian states: Vic. Tas.
Text by J.M. Hart & M. Henwood
Taxon concept: J. M. Hart & M. Henwood, 2002
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.