Hibiscus austrinus Juswara & Craven var. austrinus

Scientific Description

Shrub, with hairy stems. Leaves 40-150 mm long, 20-95 mm wide, not lobed; margins crenate; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves or present but early deciduous (only visible on youngest leaves). Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 10-15 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) present, 22-25 mm long, the lobes free, indumentum present, stellate hairs presentwith scales absent, Sessile glands absent. Calyx green, 20-25 mm long, the lobes fused less than half their length, Sessile glands absent, simple hairs (without tubercle bases) absent, stellate hairs present, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent, Terminal appendages absent, number of ribs absent. Corolla yellow, 50-55 mm long, hairs or scales present, simple hairs (without tubercle bases) present, stellate hairs present, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 1.2-2 mm long; anthers 1-1.2 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs or scales present, simple hairs present, stellate hairs absent, gland-tipped hairs absent; style 1, 20-30 mm long, with five style branches or lobes, mostly glabrous, wing absent. Fruits dehiscent (capsules and follicles), length-width ratio more or less as long as wide, hairs or scales present, simple hairs (without tubercle bases) present, stellate hairs present, Sessile glands absent, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent; apex rounded; prickles absent (except perhaps a terminal awn); terminal awns or spines present; calyx persistent to mature fruit; seeds per loculus ≥5. Flowering time April, May, June, July, August, September or October. Distribution Botanical Province Northern or Eremaean, IBRA Bioregion Pilbara, Carnarvon, Gascoyne, Little Sandy Desert, North Kimberley, Victoria Bonaparte, Central Kimberley, Dampierland and Ord-Victorian-Plain.