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Abutilon amplum Benth.

Fl.Austral. 1:200 (1863)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Erect shrub, 0.5-1.5(-2.5) m high. Fl. yellow, Mar to Sep. Sandy soils, loam. River & creek beds & edges, amongst rocks.

Grazyna Paczkowska, Descriptive Catalogue, 18 September 1996

Scientific Description

Shrub, with hairy stems. Leaves 25-95 mm long, 30-75 mm wide, not lobed; margins serrate; hairy, with Simple hairs (without tubercle bases)with scales absent, Sessile glands absent; stipules present but early deciduous (only visible on youngest leaves). Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 15-45 mm long; indumentum present, with simple hairs, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 17-25 mm long, the lobes fused half or more of their length, Sessile glands absent, simple hairs (without tubercle bases) present, stellate hairs present, scales absent, Terminal appendages absent, number of ribs absent. Corolla yellow, 26-50 mm long, glabrous. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 5-8 mm long; anthers 0.6-0.8 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, 30-34 mm long, with numerous 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) absent, 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, not accrescent; seeds per loculus 1 or ≥5. Flowering time March, April, May, June, July, August or September. Distribution Botanical Province Northern or Eremaean, IBRA Bioregion Pilbara, Carnarvon and Gascoyne.

C. Hollister and K.R. Thiele, 11 August 2023


IBRA Regions
Carnarvon, Dampierland, Gascoyne, Gibson Desert, Pilbara.
IBRA Subregions
Ashburton, Augustus, Carnegie, Chichester, Fitzroy Trough, Fortescue, Hamersley, Lateritic Plain, Pindanland, Roebourne, Wooramel.
Local Government Areas (LGAs)
Ashburton, Carnarvon, Derby-West Kimberley, East Pilbara, Karratha, Ngaanyatjarraku, Port Hedland, Upper Gascoyne, Wiluna.