Solanum species of eastern and northern Australia

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A. R. Bean

Solanum dianthophorum

Branchlets. Branchlets rusty or brown. Branchlet prickles absent. Branchlet hairs stellate. Branchlet stellae very dense, 0.4–0.5 mm diameter, stalks 0–0.1 mm long. Branchlet stellae lateral rays 8–13, porrect. Branchlet stellae central ray 0.5–1 times as long as laterals, not gland-tipped, thready or rigid.

Leaves. Leaves ovate, entire. Leaves 1.5–3.5 cm long, 0.9–1.8 cm wide, 1.9–2.4 times longer than broad. Leaf apex obtuse or acute, base obtuse or cordate. Leaf oblique part 0–1.5 mm long, obliqueness index 0–4 percent. Petioles 0.4–0.85 cm long, 20–25% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface grey-green. Upper leaf surface prickles absent or present on midvein only, 0–2, straight, acicular, 0.5–1.5 mm long. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density dense. Upper leaf surface stellae 0.1–0.2 mm apart, 0.3–0.4 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 8, porrect. 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 yellowish. Lower leaf surface prickles absent. Lower leaf surface stellate hair density very dense. Lower leaf surface stellae 0.05–0.15 mm apart, 0.3–0.4 mm diameter, stalks 0–0.1 mm long. Lower leaf surface stellae lateral rays 8, porrect. Lower leaf surface stellae central ray 0.5–1 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 absent. Inflorescence rachis prickles absent. Inflorescence 2–4-flowered. Flowers 5-merous. Pedicels at anthesis 4–5 mm long, same thickness throughout, c. 0.5 mm thick at mid-point, prickles absent. Calyx tube at anthesis c. 1.5 mm long. Calyx lobes at anthesis attenuate, c. 3 mm long. Calyx prickles at anthesis present, 1–4 per flower, 0.5 mm long. Calyx stellae very dense, brown or rusty, 0.3–0.45 mm across, stalks 0–0.1 mm long, lateral rays 8. Calyx stellae central ray 0.6–1 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla c. 7 mm long, deeply lobed, inner surface glabrous. Anthers c. 3.9 mm long.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent or present, prickles 0.5–1 mm long. Mature fruits 1 per inflorescence, globular, 10 mm diameter. Pedicels at fruiting stage 7–12 mm long, 0.9–1.2 mm thick at mid-point.

Distribution and habitat. Queensland. Qld: Port Curtis.

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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