Australian Journal of
Taxonomy
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Hibbertia trimontana K.R.Thiele sp. nov.
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Type: Western Australia: Mount Lesueur National Park: Mount Michaud, 20 September 2020, K.R. Thiele 5660 (holo: PERTH 9261826; iso: AD, CANB, MEL).

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Erect shrubs to 0.5 m high, single-stemmed at base and clearly reseeding after fire; young branchlets pubescent, with pilose hairs to 1 mm long over a shorter, moderately dense pubescence of hairs to 0.2 mm, tardily glabrescent; older stems decorticating in papery strips. Leaves spreading, scattered, narrowly elliptic, obovate or oblong, (12–)15–20(–40) mm long, 3–8 mm wide, entire or with a few short, blunt teeth in the upper half, flat but the margins loosely recurved to revolute when dried; adaxial surface sparsely to moderately pubescent with short, erect hairs to 0.1 mm long beneath sparse, spreading pilose hairs to 2 mm long, the latter deciduous from older leaves; abaxial surface as for adaxial, pale green to pale grey beneath the indumentum; apex obtuse. Flowers sessile to shortly pedicellate (the pedicel to 10 mm long), terminal or terminating axillary short-shoots, subtended by 4–6 dark brown, scarious, broadly ovate, obtuse to shortly apiculate bracts to 10 mm long, that are glabrous to minutely pubescent towards the apex. Sepals narrowly ovate, 6–8 mm long, abaxially densely silvery appressed-pubescent with hairs to 1.5 mm long (shorter towards the apex), adaxially glabrous except for minute, appressed-pubescent hairs towards the margins; midribs not prominent; outer sepals acute to sub-obtuse; inner sepals similar to the outer in size, shape, apex and indumentum but broader and more obtuse; buds acute, not rostrate. Petals yellow, obovate, 8–10 mm long, emarginate. Stamens 55--65, distributed evenly around the gynoecium, free; filaments to 2.5 mm long, closely appressed to the gynoecium; anthers oblong to rectangular, 0.8–1 mm long, dehiscing by short, introrse, longitudinal slits near the apex. Staminodes (reduced stamens) sometimes present. Carpels 3; ovaries compressed-globular, densely pubescent; styles excentrically spreading-erect from near the carpel apex, c. 2 mm long. Ovules 2 per carpel. Seeds not seen.

PERTH 03091821

PERTH 06508553

PERTH 09261842

Prev included in davisii - taller, more erect, narrower leaves