Solanum species of eastern and northern Australia

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A. R. Bean

Solanum orgadophilum

Habit. Erect, herbaceous resprouter, 0.2–0.4 m high.

Branchlets. Branchlets white or grey or brown. Branchlet prickles 1–5 per decimetre, straight, acicular, 1–3.5 mm long, 5–8 times longer than wide, glabrous or with scattered stellate hairs on lower half. Branchlet hairs stellate. Branchlet stellae dense or very dense, 0.4–0.7 mm diameter, stalks 0–0.15 mm long. Branchlet stellae lateral rays 7–8, porrect. Branchlet stellae central ray 0.3–1.3 times as long as laterals, not gland-tipped. Branchlet Type 2 hairs absent.

Leaves. Leaves ovate or broadly ovate, entire. Leaves 6.5–20 cm long, 3.8–11.7 cm wide, 1.4–2 times longer than broad. Leaf apex obtuse or acute, base obtuse or cordate. Leaf oblique part 0–2 mm long, obliqueness index 0–2 percent. Petioles 3.2–8.4 cm long, 28–83% length of lamina, prickles absent or present.

Upper leaf surface. Upper leaf surface grey-green. Upper leaf surface prickles absent. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density moderate density or dense. Upper leaf surface stellae 0.1–0.25 mm apart, 0.3–0.4 mm across, stalks 0–0.1 mm long. Upper leaf surface stellae lateral rays 6–8, porrect. Upper leaf surface stellae central ray 0.2–0.7 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 or very dense. Lower leaf surface stellae 0.05–0.2 mm apart, 0.5–0.7 mm diameter, stalks 0–0.15 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.3–0.8 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 30–35 mm long. Inflorescence rachis prickles absent or present. Inflorescence 3–6-flowered. Flowers 5-merous. Pedicels at anthesis 6–11 mm long, same thickness throughout, 0.5–0.9 mm thick at mid-point, prickles absent or present. Calyx tube at anthesis 2.5–3.5 mm long. Calyx lobes at anthesis deltate, 2–6 mm long. Calyx prickles at anthesis absent. Calyx stellae dense or very dense, brown or rusty, 0.3–0.4 mm across, stalks 0–0.1 mm long, lateral rays 8. Calyx stellae central ray 0.8–1.2 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 13–14 mm long, rotate, inner surface glabrous. Anthers 4.8–5.5 mm long. Filaments 1 mm long. Ovary with stellate and Type 2 hairs. Functional style 8.5 mm long, protruding between anthers, with stellate hairs only.

Fruits. Fruiting calyx prickles absent.

Distribution and habitat. Queensland. Qld: Leichhardt. Grassland or open woodland on cracking clays.

Miscellaneous. Subg. Leptostemonum. Data source: specimens.

Illustrations. • young vigorous plant. • senescent plant.


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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