Duperreya commixta

Nomenclature

Accepted name/Authority/Place of publication: 

Duperreya commixta (Staples) Staples, Blumea 51: 451. 2006.

Synonyms: 

Porana commixta Staples, Nuytsia 6(1): 52. 1987.  TYPE: Australia.  Western Australia: 52 km W of Wiluna, 29 Aug. 1970, P. G. Wilson 8965 (holotype: PERTH; isotypes: A, CANB, K).  

Description

Habit: 
Perennial twiner to 4 m, silvery gray-sericeous. Stems woody, cylindrical, 3–5 mm diam., brownish red with sparse paler lenticels, glabrate, bark peeling with age. Indumentum of 2-armed hairs up to 1 mm long, arms mostly equal, appressed, occasionally unequal and erect.
Leaves: 
Leaf petiole < 1 mm long; blade linear to narrowly lanceolate or narrowly oblong, 16–57 by 1.5–5 mm, base cuneate to obtuse, apex acuminate to acute, rarely obtuse or rounded, usually mucronulate, adaxially darker, sparsely sericeous, abaxially sericeous.
Flowers: 
Flower peduncle filiform, 6–8 mm long; bracteoles subopposite, narrowly elliptic-lanceolate, subequal, 2–5 mm by < 1 mm, slightly enlarging in fruit; buds ellipsoidal, apex obtuse, ± sparsely sericeous. Calyx incompletely covering corolla tube; sepals equal in length, outer 2 broader, narrowly elliptic to tapering lanceolate, 5–7 by 1–2.5 mm, base rounded to truncate, margins entire, apex acute, chartaceous, outside sparsely pubescent, shining, inside glabrous; veins 3. Corolla campanulate, 7–13 by 8–15 mm, membranous, blue, purple-blue, purple or white, limb entire to lobed, lobes obtuse, apiculate, glabrous (rarely subsericeous along interplicae). Stamens (sub)equal; filaments 2–3 mm long; anthers 1.5–2 mm long, introrse, dehiscing in bud; pollen 3-colpate (rarely 3-zonocolpate), prolate spheroidal, ca. 32–33 by 27–31 micrometer, surface psilate. Pistil just exceeding corolla tube, glabrous; disc dark brown; ovary ovoid-ellipsoid, ca. 1 mm, unilocular; style filiform, 3.5–5 mm long, sometimes jointed above ovary; stigma < 1 mm diam., wrinkled.
Fruits: 
Fruiting calyx spreading; narrowly elliptic-oblong to narrowly ovate, 11–15(–20) by 3–6(–10) mm, stramineous to tan, glabrate; veins 5. Utricle ellipsoid, apiculate, 5–5.5 by 3.5–4.5 mm, brownish tan with darker striations, smooth, glabrous or apex with a few hairs.
Seeds: 
Seed ellipsoid to subspherical or obovoid, ca. 4 mm diam., reddish-brown; hilum ca. 1 mm diam.
Author: 
G. Staples
References: 

Staples, G.W. 2006. Blumea 51: 403–491.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Australia (Western Australia, SE Queensland, NW New South Wales, Northern Territory). (Map). 

Ecology: 

Inland situations
in dry habitats near pools and watercourses: on rocky slopes in dead scrub,
mulga, bloodwood, among lancewood escarpments, in Dodonaea thickets,
over rocks, and along forest margins. Soil types recorded as red sands, loamy
or sandy-clay soils, and crevices in limestone-conglomerate cliffs. From 0–200
m elevation.

Australia: It grows on rocky escarpments and along creeklines, on
sandy, loamy or sandy-clay soils in Acacia
thickets (especially mulga and lancewood) and in bloodwood woodlands.

Phenology: 

Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Flowering specimens

7

11

6

6

Fruiting specimens

2

1

1

3

2

Australia: Flowering occurs from July to November with fruiting specimens collected through to March.

Author: 
G. Staples, Johnson, R.W.
References: 

Staples, G.W. 2006. Blumea 51: 403–491.

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

Other information

General comments: 

Duperreya commixta has narrowly elliptic to lanceolate sepals, widest below the middle and gradually tapering distally; the calyx incompletely covering the lower corolla (the corolla tube is visible between the sepals); the biglobose stigma, each lobe directed more or less horizontally from the style apex; the fruiting sepals narrowly elliptic-oblong or narrowly ovate. Dried material of D. commixta has a silvery-gray aspect due to the color of the indumentum.

The range of Duperreya commixta overlaps in Western Australia with that of D. sericea. The former is found primarily on inland sites, while D. sericea has a more coastal distribution.  

A specimen of D. commixta collected by David Albrecht from 2.5 km N of Puntitjata Out-station in the far SW of the Northern Territory currently appears to be from a remote outlier more than 500 km to the east of the main population.

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Duperreya commixta
Fri, 2011-09-23 03:22 -- Esmond
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