Shrub prostrate, 2–5 x 10–25 cm, suckering not observed. Young stems with medium to dense, sessile, white, stellate hairs with 3–8 erect arms up to 0.3mm long, intermixed with red-tipped, clavate, glandular trichomes up to 0.3mm long, without basal layer of small stellate hairs. Stipules narrowly ovate, 2.1–4.1 x 0.4–1.4 mm, apex acute or acuminate, entire. Mature leaves petioles 1.1–11.9mm long; blade flat to scarcely undulate, with margin scarcely recurved or flat, base unequal, strongly to slightly cordate, margin irregularly crenulate, apex obtuse; blade ovate, 2.3–23.5 x 1.8–18mm (juvenile leaves not seen); discolorous, dark glossy green over paler fawn–green; abaxial surface blade and ribs with dense, sessile, white, stellate hairs with ~6 erect arms up to 0.4mm long, over smaller, stellate hairs and intermixed scattered, red-tipped, clavate, glandular trichomes up to 0.35mm long; adaxial surface glabrous or with scattered, sessile, white, stellate hairs with 1 or 2(–4) erect arms up to 0.2mm long and occasional, white, clavate, glandular trichomes up to 0.1mm long. Inflorescence 6–7mm long, 4–9(–11)-flowered. Bud dark pink throughout; calyx lobes valvate; apex rounded. Peduncle 0.65.2mm long. Pedicel non-articulated, 1.8–4.1mm long. Peduncle and pedicel with dense, sessile, white, stellate hairs with ~6 erect arms up to 0.25mm long, and intermixed medium-density, redtipped, clavate, glandular trichomes up to 0.3mm long. Bract narrowly ovate, 1.1–4.1 x 0.15–0.6 mm. Calyx outer surface dark pink, inner surface white throughout, becoming pink; total length 2.1–2.3mm long; tube 0.5–0.6mm long; lobes ovate, 1.6–1.7 0.6–1.1 mm, ~74% of total calyx length, apex acute; abaxial surface with dense, white, stellate hairs with ~6 erect arms up to 0.2mm long, intermixed with long-stalked, clavate, glandular trichomes up to 0.3mm long; adaxial surface, base glabrous, central lobe with either scattered, white, simple, appressed hairs up to 0.2mm long, or occasional, white, clavate, glandular trichomes up to 0.1mm long, towards margin with medium-density, simple hairs up to 0.1mm long. Petals white throughout with streak of red up the main vein; 1.5 x 1.1–1.2 mm; glabrous; base ovate when lateral lobes flattened; margin flat; apical ligule sessile, subcircular to broadly obovate, 0.7–0.8 x 0.5–0.6 mm. Staminal tube 0.2–0.25mm long. Staminodes 1 or 3 between each stamen; central staminode ovate, white, 1.4–1.5 x 0.5 mm; lateral staminodes, if present, linear, white, papillose, adnate to filament, ~0.6 x 0.15 mm. Filaments 0.5–0.7 x 0.25 mm. Anthers dark red with white connective, 0.25–0.3 x 0.4–0.5 mm. Ovary 5-loculate, ovoid, 0.6–0.7 x 0.6–0.7 mm, outer surface smooth, glabrous. Ovules 4–6 per locule. Styles 0.5–0.6mm long. Fruit and seed not seen. Flowering period: August to October.
Androcalva adenothalia |
Status: Critically Endangered on the EPBC Act list
Government evidence of impact of climate change:
Australian Government, Conservation Advice, Androcalva adenothalia
Climate change modelling for the south west predicts a decline in rainfall; and some seasonal shift to summer rainfall events; which is likely to increase the potential impact of drought on the species.
Drought and climate change are suspected as current and future threats.
Long term climate change may impact the viability of any new subpopulations that are located or established; if the species is existing in habitat at the extreme of its moisture tolerance.
Previous known collection sites no longer exist due to vegetation clearing. (iii) The habitat is highly threatened by road maintenance; poor recruitment and fire and a projected decline in area; extent and habitat quality is projected. (iv) Previously known collections (locations); Morawa and Canna have not been relocated.
Past; current; future Altered fire regimes Whole population Severe The species may require fire to stimulate germination.
Past; current; future Drought Whole population Severe This is a threat to the species and may have been the cause of recent deaths.