Solanum species of eastern and northern Australia


A. R. Bean

Solanum dissectum

Habit. Erect, rhizomatous perennial shrub, 0.3–0.8 m high.

Branchlets. Branchlets grey or brown. Branchlet prickles 3–10 per decimetre, straight, acicular, 4–11 mm long, 9–13 times longer than wide, glabrous. Branchlet hairs absent. Branchlet stellae absent.

Leaves. Leaves ovate or broadly ovate, deeply lobed throughout. Leaf lobes 2–4 on each side, acute or obtuse, lobing index 7–22. Leaves 2–5.5 cm long, 0.9–2.5 cm wide, 1.5–2.9 times longer than broad. Leaf apex obtuse or acute, base cuneate or obtuse. Leaf oblique part 0–1.5 mm long, obliqueness index 0–5 percent. Petioles 0.3–1.2 cm long, 12–25% length of lamina, prickles absent or present.

Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles absent or present on midvein only, 0–4, straight, acicular, 1–7 mm long. Upper leaf surface stellate hairs absent, hair density absent from surface. Upper leaf surface simple hairs absent. Upper leaf surface Type 2 hairs present only in vein depressions.

Lower leaf surface. Lower leaf surface green. Lower leaf surface prickles absent or present on midvein only, 0–4, straight, acicular. Lower leaf surface stellate hair density absent. 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, 0–2 mm long. Inflorescence rachis prickles absent. Inflorescence 2–5-flowered, with all flowers bisexual. Flowers 5-merous. Pedicels at anthesis 6–8 mm long, markedly thicker distally, 0.4–0.5 mm thick at mid-point, prickles absent. Calyx tube at anthesis 1–2 mm long. Calyx lobes at anthesis rostrate, 1–2.5 mm long. Calyx prickles at anthesis absent. Calyx stellae absent. Calyx simple hairs absent, Type 2 hairs absent. Corolla mauve, 6–9 mm long, deeply lobed, inner surface glabrous. Anthers 2.5–4 mm long. Ovary with Type 2 hairs only. Functional style 4–6.5 mm long, protruding between anthers, glabrous.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1 per inflorescence, globular, 7–9 mm diameter, red, 1-locular (septum absent or incomplete). Mature fruits placenta not apparent. Mature fruits interior juicy, succulent, pericarp 0.2–0.3 mm thick. Pedicels at fruiting stage 10–19 mm long, 0.5–1 mm thick at mid-point. Seeds pale yellow, 3–4.1 mm long.

Distribution and habitat. Queensland. Qld: Leichhardt, Port Curtis. Semi-evergreen vine thicket or brigalow/belah.

Miscellaneous. Subg. Leptostemonum. Data source: specimens.

Illustrations. • leaves.

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