Solanum species of eastern and northern Australia

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A. R. Bean

Solanum viarum

Habit. Erect, rhizomatous perennial shrub, 0.3–1 m high.

Branchlets. Branchlet prickles 13 per decimetre, straight, broad-based or curved, broad-based, 1–6 mm long, 1.5–6 times longer than wide. Branchlet hairs simple. Branchlet stellae absent. Branchlet simple hairs erect, straight, gland-tipped, 0.3–0.7 mm long. Branchlet Type 2 hairs absent.

Leaves. Leaves ovate or broadly ovate, shallowly lobed throughout. Leaf lobes 3–4 on each side, lobing index 1.1–1.3. Leaves 9.4 cm long, 7.3 cm wide. Leaf apex acute, base cordate. Petioles 3.2 cm long, 34% length of lamina, prickles present.

Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles present on midvein and lateral veins, straight, acicular or straight, broad-based. Upper leaf surface stellate hairs absent, hair density absent from surface. Upper leaf surface simple hairs erect, straight, moderate to dense, not gland-tipped, 0.4–1.5 mm long. Upper leaf surface Type 2 hairs absent.

Lower leaf surface. Lower leaf surface green or yellowish. Lower leaf surface prickles present on midvein and lateral veins, 20–50, straight, acicular or straight, broad-based. Lower leaf surface stellate hair density very sparse or sparse. Lower leaf surface stellae 0.5–2 mm apart, 0.6–1 mm diameter, stalks 0–0.2 mm long. Lower leaf surface stellae lateral rays 4, porrect. Lower leaf surface stellae central ray 1.5–2 times as long as laterals, not gland-tipped. Lower leaf surface simple hairs erect, straight, moderate to dense, not gland-tipped or gland-tipped. Lower leaf surface Type 2 hairs absent.

Inflorescence. Inflorescence supra-axillary, solitary or sessile (rachis very short or absent). Inflorescence common peduncle absent or present. Inflorescence 1–5-flowered. Flowers 5-merous. Calyx prickles at anthesis present. Calyx stellae absent. Calyx simple hairs present. Corolla white, deeply lobed. Anthers 4.8–6 mm long. Functional style protruding between anthers, glabrous.

Fruits. Fruiting calyx lobes less than half length of mature fruit. Mature fruits globular, yellow. Seeds pale yellow or brown.

Distribution and habitat. Queensland, New South Wales. Qld: Moreton. NSW: North Coast.

Miscellaneous. Naturalised. Subg. Leptostemonum. Common name: Tropical soda apple. Data source: specimens.

Illustrations. • fruits. • fruits.


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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