Solanum species of eastern and northern Australia

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A. R. Bean

Solanum austropiceum

Habit. Erect, rhizomatous perennial shrub, 0.4–1.2 m high.

Branchlets. Branchlets white or grey. Branchlet prickles 6–22 per decimetre, straight, acicular, 3–9 mm long, 10–15 times longer than wide, glabrous or with scattered stellate hairs on lower half. Branchlet hairs stellate. Branchlet stellae very dense, 0.4–0.6 mm diameter, stalks 0 mm long. Branchlet stellae lateral rays 12–16, porrect. Branchlet stellae central ray 0.1–0.6 times as long as laterals, not gland-tipped. Branchlet Type 2 hairs absent.

Leaves. Leaves lanceolate or elliptical, entire. Leaves 3.5–8 cm long, 0.8–1.5 cm wide, 4.1–6.1 times longer than broad. Leaf apex obtuse or acute, base cuneate or obtuse. Leaf oblique part 0–8 mm long, obliqueness index 0–14 percent. Petioles 0.5–2.1 cm long, 11–37% length of lamina, prickles absent or present.

Upper leaf surface. Upper leaf surface green or grey-green. Upper leaf surface prickles absent or present on midvein only. Upper leaf surface stellate hairs absent or confined to midrib or distributed throughout, hair density absent from surface or very sparse or sparse. Upper leaf surface stellae 0.3–2 mm apart, 0.25–0.4 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 11–16, porrect. Upper leaf surface stellae central ray 0.1–0.4 times as long as laterals, not gland-tipped. Upper leaf surface simple hairs absent. Upper leaf surface Type 2 hairs absent.

Lower leaf surface. Lower leaf surface white, grey. Lower leaf surface prickles absent or present on midvein only. Lower leaf surface stellate hair density moderate or dense or very dense. Lower leaf surface stellae 0.05–0.3 mm apart, (0.25–)0.3–0.6 mm diameter, stalks 0 mm long. Lower leaf surface stellae lateral rays 11–16, porrect. Lower leaf surface stellae central ray 0.1–0.7 times as long as laterals, not gland-tipped. Lower leaf surface simple hairs absent. Lower leaf surface Type 2 hairs absent.

Inflorescence. Inflorescence supra-axillary, cymose (pseudo-racemose). Inflorescence common peduncle absent or present, 0–4 mm long. Inflorescence rachis prickles absent. Inflorescence 4–11-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 5–10 mm long, same thickness throughout, prickles absent. Calyx tube at anthesis 1.5–2.5 mm long. Calyx lobes at anthesis hemispherical or deltate, 2–3 mm long. Calyx prickles at anthesis absent. Calyx stellae dense or very dense, yellow or white, 0.25–0.35 mm across, stalks 0 mm long, lateral rays 8–16. Calyx stellae central ray 0.3–1 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 10–15 mm long, rotate, inner surface glabrous. Anthers 3.8–6 mm long. Filaments 1.5 mm long. Ovary glabrous. Functional style 8–9 mm long, protruding between anthers, glabrous or with stellate and Type 2 hairs.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1–2 per inflorescence, globular, 11–15 mm diameter, black, 1-locular (septum absent or incomplete). Mature fruits pericarp 0.1–0.3 mm thick. Pedicels at fruiting stage 7–11 mm long. Seeds black, 3.5–4.2 mm long.

Distribution and habitat. Western Australia.

Miscellaneous. Subg. Leptostemonum. Data source: specimens.


Cite this publication as: ‘Bean, A.R. 2012 onwards. Solanum species of eastern and northern Australia. Version: 29th June 2013. http://delta-intkey.com’.

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