Solanum species of eastern and northern Australia

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A. R. Bean

Solanum silvestre

Habit. Erect, rhizomatous perennial shrub, 1–1.8 m high.

Branchlets. Branchlets grey or brown. Branchlet prickles absent or present, 0–11 per decimetre, straight, acicular, 5–8 mm long, glabrous. Branchlet hairs stellate. Branchlet stellae very dense, 0.25–0.3 mm diameter. Branchlet stellae lateral rays 7–8, porrect. Branchlet stellae central ray absent or present, 0–0.5 times as long as laterals, not gland-tipped.

Leaves. Leaves elliptical or ovate, entire or shallowly lobed throughout. Leaf lobes 0 on each side or 2–3 on each side, obtuse, lobing index 1–1.4. Leaves 5–10 cm long, 2–3.6 cm wide, 2.5–3.4 times longer than broad. Leaf apex acute, base cuneate. Leaf oblique part 0–3 mm long, obliqueness index 0–4 percent. Petioles 0.9–2.2 cm long, 18–28% length of lamina, prickles absent or present.

Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles present on midvein only or present on midvein and lateral veins. Upper leaf surface stellate hairs distributed throughout, hair density very sparse or sparse. Upper leaf surface stellae 0.3–0.5 mm apart, 0.15–0.25 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 6–8. Upper leaf surface stellae central ray 0.5–2 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 or yellowish. Lower leaf surface prickles absent or present on midvein only. Lower leaf surface stellate hair density very dense. Lower leaf surface stellae 0.2–0.3 mm diameter. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0–0.5 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 rachis prickles absent. Inflorescence 3–6-flowered, with one bisexual flower, the rest male or some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 7–12 mm long, same thickness throughout, prickles absent. Calyx tube at anthesis 3–4.5 mm long. Calyx lobes at anthesis attenuate, 3–9 mm long. Calyx prickles at anthesis absent or present, 0–5 per flower. Calyx stellae dense, transparent or purple, 0.35–0.5 mm across, lateral rays 7–8. Calyx stellae central ray 0.5–1.5 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 10–16 mm long, rotate. Anthers 4.5–5.5 mm long. Ovary with stellate and Type 2 hairs. Functional style 7.5–8.5 mm long, protruding between anthers, with Type 2 hairs only or with stellate and Type 2 hairs.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent or present. Mature fruits 1–4 per inflorescence, globular, 13–17 mm diameter, yellowish-green or green, often streaked, 2-locular. Mature fruits placenta stalked, circular to elliptical or stalked, anvil-shaped. Mature fruits interior moist but not juicy, pericarp 0.4–0.6 mm thick. Pedicels at fruiting stage 8–11 mm long. Seeds white or pale yellow, 2.3–2.6 mm long.

Distribution and habitat. New South Wales, Victoria. NSW: South Coast. Wet eucalypt forest with rainforest understorey, or rainforest margins, shrubby eucalypt woodland, remote from rainforest.

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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