Australian Journal of
Taxonomy
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Hibbertia consuta K.R.Thiele, sp. nov.
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Three Springs-Eneabba Road, Kadathinni, 22 Sept. 2022, F. Hort, J. Hort & P. Chan FH 4589 (PERTH 9513183; iso: AD, MEL, CANB - CHECK).

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Erect to spreading shrubs to (0.15–)0.3–0.6 m high, with several to many stems at base and resprouting after fire; young branchlets sparsely to moderately pubescent with short, stellate hairs. Leaves spreading, scattered, narrowly oblong, ovate or obovate, 3–8 mm long, 1–2 mm wide, thick-textured, the margins strongly recurved to the prominent midrib and obscuring the abaxial surface; adaxial surface smooth to moderately tuberculate, usually with very short spreading simple or sub-stellate hairs from the surface or the tubercles (rarely with longer hairs when young); abaxial surface densely cottony-pubescent, mostly obscured by the margins but visible as a dense, pubescent strip between the broad, glabrous to sparsely pubescent midrib and the margins; apex obtuse, straight. Flowers sessile, terminating short-shoots or main stems; flower-subtending bracts 8–12. narrowly ovate to narrowly triangular, chartaceous, almost glabrous to pubescent (the margins minutely ciliolate), 6–8 mm long, acute, the lowermost sometimes with reduced leaf blades. Sepals ovate, 5–7 mm long; midribs not prominent; outer sepals acute to acuminate, usually glabrous with ciliolate margins; inner sepals similar in size and apex shape but broader, slightly thinner, and with an indumentum of short, sub-stellate hairs where covered by outer sepals in bud. Petals 5, yellow, broadly obovate, 8–10 mm long, emarginate or entire. Stamens 10, all on one side of the gynoecium and curving over it like a hand of bananas; filaments 0.5–0.7 mm long, fused at the base into a robust claw; anthers rectangular, 1.8–2 mm long, dehiscing by introrse, longitudinal slits. Staminodes 2(3) either side of the stamens. Carpels 2; ovaries compressed-globular, densely pubescent; styles inserted excentrically on the carpel apex, parallel and curved beneath the stamens, 1.2–1.5 mm long. Ovules 2 per carpel. Fruiting carpels and seeds not seen.

Other specimens examined (all PERTH): Three Springs (3069257), Tathra National Park (6312047), Between Three Springs and Eneabba (3069273, 3069265, 3069281, 3069230). For full specimen details, see the following batch search of the ALA for this set of specimens: https://biocache.ala.org.au/occurrences/search?q=qid:1665473118898#tab_mapView

Diagnostic features. Hibbertia consuta can be distinguished from all other species in the H. aurea-H. crassifolia group by the combination of short, thick, obtuse, smooth to tuberculate, usually sparsely short-pubescent leaves with a densely cottony-pubescent abaxial indumentum visible on either side of the broad, prominent, glabrous to sparsely pubescent midrib even though the margins are tightly recurved.

Phenology. Flowers in August to October with a peak in September.

Distribution & habitat. Occurs between Three Springs and Eneabba, in Tathra National Park and adjoining nature reserves (Fig. 5), in low kwongan sandplain heath.

Conservation status. Hibbertia consuta is relatively localised but is common in Tathra National Park and Wotto Nature Reserve. Its conservation status should be assessed.

Etymology. From the Latin consutus (stuffed, filled up), in reference to the abundant woolly indumentum within the lacunae formed between the leaf midrib and the recurved margins, which characteristically appears to spill out either side of the midrib

Notes. Hibbertia consuta occurs north of, and is narrowly allopatric with, the true H. crassifolia, which is superficially similar. It can be readily distinguished from H. crassifolia by the prominent abaxial leaf midribs, with the dense abaxial lamina pubescence visible in two strips between the midrib and the margins. Leaves of H. crassifolia have a weak midrib and margins that recurve to each other at least when dried, with a sparsely to moderately pilose abaxial lamina and midrib surface.