Duperreya halfordii

Nomenclature

Accepted name/Authority/Place of publication:

Duperreya halfordii R.W. Johnson, Austrobaileya 8: 51. 2009.

Type: New South Wales. Lower part of gorge on W side of Mt Gunderbooka, 7 November 1987, P.G. Wilson 166 & D.I. Wilson (holotype BRI; isotypes MEL, NSW).

Description

Habit:

Perennial; stems climbing, woody at the base, moderately dense to densely sericeous, becoming ± glabrous with age; hairs bifid, arms 0.1-0.25 mm long, appressed.

Leaves:

Leaves petiolate; petiole 0.5-2 mm long, 0.03-0.07 times as long as the blade; blade linear to linear-ovate, 10-35 mm long, 1-4 mm wide with a length:breadth ratio of 8.5-11.5, apex acute to barely obtuse, base rounded to obtuse, moderately to densely sericeous on both sides.

Inflorescences:

Inflorescence axillary, cymose; peduncle slender 9-10 mm long at flowering, up to 16 mm long at fruiting, bearing a single flower; bracteoles opposite, narrowly ovate to elliptic, 3-4 mm long, 0.9-1.5 mm wide, extending to 7 x 3.5 mm at fruiting, vestiture as for the leaves; pedicel absent.

Flowers:

Outer sepals ovate to ovate-elliptic, 4.5-6 mm long, 2-3 mm wide, with a length:breadth ratio of 2-2.4, apex acute to obtuse, base attenuate to obtuse, becoming broadly ovate, chartaceous and extending to 20 mm x 11 mm at fruiting with the length:breadth ratio decreasing to 1.5, rounded to almost emarginate at the apex, moderately densely sericeous, becoming sparse with age with 5 prominent longitudinal veins; inner sepals elliptic to oblong-elliptic, 4.5-6 mm long, 1.8-2.0 mm wide, with a length:breadth ratio of 3.5-5.5, apex barely acute to obtuse, extending to 18 mm x 10 mm at fruiting and becoming obtuse to rounded at the apex.. Corolla campanulate to slightly funnel-shaped, blue, slightly lobed, petals 7-10 mm long, 5-6 mm at the rim, rounded, sometimes emarginate, at the distal end, sparsely hairy on the midpetaline bands for 3.5-4-5 mm. Stamens 5, filaments terete, dilated downwards, 3.2-3.8 mm long, fused to the base of the corolla tube for 0.5-0.75 mm, glabrous or with an occasional low tubercle at the base; anthers ovate-oblong, sagittate, 1.25-1.45 mm long, 0.6-0.7 mm wide, basal lobes 0.3-0.4 mm long, apex rounded emarginate. Ovary 1-1.4 mm high, glabrous, disk cup-shaped, not prominent; style 1, filiform 3.5-4 mm long, bearing a bi-globose stigma.

Fruits:

Utricle ellipsoid, with a persistent style base, indehiscent, 4.5-5.5 mm long, glabrous or with a few hairs, surface wrinkled and longitudinally striated

Seeds:

Seed 1, 4-4.5 mm long.

Author:

Johnson, R.W.

References:

Johnson, R.W. Austrobaileya 8: 47–54. 2009.

Biogeography, Ecology and Natural History

Distribution:

Australia (Queensland, New South Wales).

Ecology:

It grows on rocky hills and along stoney creeklines in Acacia thickets particularly mulga (Acacia aneura) and lancewood (A. shirleyi), and in red box (Eucalyptus intertexta) and leopardwood (Flindersia maculosa) communities on
sandy or loamy, often shallow, red soils.

Phenology:

Flowering has been recorded from September to November with fruiting through to February.

Author:

Johnson, R.W.

References:

Johnson, R.W. Austrobaileya 8: 47–54. 2009.

Other information

Phylogeny and infrageneric relationships:

Staples (2006)
noted that plants of D. commixta from
around Cobar, New South Wales, had wider sepals than those from Queensland and
Western Australia but the sepals appeared intermediate in size between D. sericea and other specimens of D. commixta. In other respects he
concluded the Cobar population was typical of D. commixta. These plants are here removed to a new species, D. halfordii.

Authorship for webpage

Editor:

George Staples, Esmond Er

Contributors:

Convolvulaceae Unlimited

Convolvulaceae

Duperreya halfordii

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