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Lasiopetalum pterocarpum E.M.Benn. & K.A.Sheph.

Reference
Nuytsia 16:177-179, Figs 1-2, 4 (2006)
Conservation Code
Threatened
A taxon name retains its ‘Threatened’ status until a new name has been officially endorsed and appears in the Gazettal Notice.
Naturalised Status
Native to Western Australia
Name Status
Current

Open, multi-stemmed shrub (with distinctly winged fruit), to 1.2 m high. Fl. pink, Aug to Dec. Dark red-brown loam or clayey sand over granite. On sloping banks near creeklines.

Amanda Spooner, Descriptive Catalogue, 13 September 2007
Image

Scientific Description

Shrub, with hairy stems. Leaves 30-40 mm long, 10-40 mm wide, tripartitely lobed or irregularly lobed, simply (once-)lobed or complexly (twice-)lobed; margins crenate; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules apparently absent, even from youngest leaves. Perianth of two whorls but the corolla reduced to small scales or tiny lobes at the base of the ovary. Pedicel present, 4-4.5 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) present, 2.5-6 mm long, the lobes free, indumentum present, stellate hairs presentwith scales absent, Sessile glands absent. Calyx pink, 4.5-7.5 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 glabrous. Indumentum (outside) Sessile glands absent. Stamens five, free and inserted at the base of the ovary; filaments present, 0.1-0.2 mm long; anthers 1.5-2 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs or scales present, simple hairs absent, stellate hairs present, gland-tipped hairs absent; style 1, with a lobed or capitate stigma, 3.4-3.6 mm long, with one style branches or lobes, hairy for most of length, wing absent. Flowering time August, September, October, November or December. Distribution Botanical Province South-West, IBRA Bioregion Jarrah Forest. Conservation Code Threatened (T).

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

Distribution

IBRA Regions
Jarrah Forest.
IBRA Subregions
Northern Jarrah Forest.
Local Government Areas (LGAs)
Serpentine-Jarrahdale.

Nuytsia Journal Articles

Lasiopetalum pterocarpum (Malvaceae s.l.: Lasiopetaleae), a new and and rare species from south-west Western Australia

SHEPHERD, K.A., BENNETT, ELEANOR M., WILKINS, C.F. AND SAGE, L.W., Nuytsia 16 (1): 175–181 (2006)

Lasiopetalum pterocarpum E.M. Benn. & K.A. Sheph. sp. nov. is described and illustrated. The distinct winged fruit, for which L. pterocarpum is named, is unique within Lasiopetaleae. Lasiopetalum pterocarpum is allied to L. floribundum, which shares a similar habit, large ovate leaves and loose dichasial inflorescences. It can be readily distinguished from L. floribundum by its discolorous and strongly-lobed leaves, the absence of glandular hairs on the peduncles, and its larger seeds. This species is known from only one population south of Perth and is classified as critically endangered.