Solanum species of eastern and northern Australia

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A. R. Bean

Solanum intonsum

Habit. Erect, rhizomatous perennial shrub, 0.8–2 m high.

Branchlets. Branchlets grey or yellow or rusty or brown. Branchlet prickles absent or present, 0–5 per decimetre, straight, broad-based, 0.5–6 mm long, 4–7 times longer than wide, glabrous or with scattered stellate hairs on lower half. Branchlet hairs stellate. Branchlet stellae dense to very dense, 0.3–0.5 mm diameter, stalks 0–0.2 mm long. Branchlet stellae lateral rays 6–8, porrect. Branchlet stellae central ray 0.3–0.7 times as long as laterals, not gland-tipped, rigid.

Leaves. Leaves lanceolate or ovate, entire. Leaves 4.5–16.5 cm long, 1.3–6.5 cm wide, 2.1–4.5 times longer than broad. Leaf apex acute, base cuneate or obtuse. Leaf oblique part 0–5 mm long, obliqueness index 0–6 percent. Petioles 0.3–2.5 cm long, 7–30% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface green or grey-green. Upper leaf surface prickles absent. Upper leaf surface stellate hairs distributed throughout, protostellae present, hair density moderate density to dense. Upper leaf surface stellae 0.1–0.2 mm apart, 0.15–0.25 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 4–10, ascending. Upper leaf surface stellae central ray 0.5–1 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. Lower leaf surface stellate hair density dense to very dense. Lower leaf surface stellae 0.05–0.1 mm apart, 0.4–0.6 mm diameter, stalks 0–0.2 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.2–0.6 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, sessile (rachis very short or absent) or cymose (pseudo-racemose). Inflorescence common peduncle absent or present, 0–5 mm long. Inflorescence rachis prickles absent. Inflorescence 2–7-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 4–9 mm long, same thickness throughout, 0.5–0.8 mm thick at mid-point, prickles absent. Calyx tube at anthesis 3–4.5 mm long. Calyx lobes at anthesis attenuate, 1–5 mm long. Calyx prickles at anthesis absent. Calyx stellae dense to very dense, yellow, 0.25–0.4 mm across, stalks 0–0.1 mm long, lateral rays 7–8. Calyx stellae central ray 0.5–1 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 9–13 mm long, shallowly lobed, inner surface sparsely stellate-hairy. Anthers 4.5–5.5 mm long. Ovary with Type 2 hairs only. Functional style 8–9 mm long, protruding between anthers, with stellate hairs only or with Type 2 hairs only. Functional style stellae c. 0.3 mm across, lateral rays 5–6, central ray 0.5–1 times as long as laterals.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1–2 per inflorescence, globular, 16 mm diameter, yellowish-green or green, often streaked, 2-locular. Mature fruits placenta sessile, linear. Mature fruits interior moist but not juicy, pericarp 2 mm thick. Pedicels at fruiting stage 7–10 mm long, 0.8–1 mm thick at mid-point. Seeds pale yellow, 2.3–2.8 mm long.

Distribution and habitat. Queensland. Qld: Cook. Wet eucalypt forest with rainforest understorey, or rainforest margins, shrubby eucalypt woodland, remote from rainforest.

Miscellaneous. Subg. Leptostemonum. Data source: specimens.

Illustrations. • immature fruits. • flowering branchlet.


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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