Solanum species of eastern and northern Australia

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A. R. Bean

Solanum ultimum

Habit. Erect, rhizomatous perennial shrub, 0.3–0.6 m high. Large stems prickles absent.

Branchlets. Branchlets white or grey or yellow. Branchlet prickles absent. Branchlet hairs stellate. Branchlet stellae very dense, 0.6–0.9 mm diameter, stalks 0–0.1 mm long. Branchlet stellae lateral rays 7–9, porrect. Branchlet stellae central ray 0.4–0.8 times as long as laterals, not gland-tipped, thready.

Leaves. Leaves lanceolate or ovate, entire. Leaves 4–6 cm long, 1.1–2.3 cm wide, 2.7–3.6 times longer than broad. Leaf apex obtuse or acute, base cuneate or obtuse. Leaf oblique part 0–1.5 mm long, obliqueness index 0–2 percent. Petioles 0.7–1.4 cm long, 16–23% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles absent. Upper leaf surface stellate hairs confined to midrib or distributed throughout, protostellae present, hair density absent from surface or very sparse or sparse. Upper leaf surface stellae 0.4–4 mm apart, 0.25–0.4 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 7–8, 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 white, grey. Lower leaf surface prickles absent. Lower leaf surface stellate hair density dense to very dense. Lower leaf surface stellae 0.1–0.2 mm apart, 0.4–0.6 mm diameter, stalks 0–0.1 mm long. Lower leaf surface stellae lateral rays 8–9, porrect. Lower leaf surface stellae central ray 0.2–0.8 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, solitary or sessile (rachis very short or absent). Inflorescence common peduncle absent. Inflorescence 1–3-flowered, with all flowers bisexual. Flowers 4–5-merous. Pedicels at anthesis 5–9 mm long, same thickness throughout or markedly thicker distally, 0.9–1 mm thick at mid-point, prickles absent. Calyx tube at anthesis 0.5–1.5 mm long. Calyx lobes at anthesis elliptic, 4–6 mm long. Calyx prickles at anthesis absent. Calyx stellae dense to very dense, white, 0.4–0.5 mm across, stalks 0–0.1 mm long, lateral rays 8–9. Calyx stellae central ray 0.4–0.8 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 7–9 mm long, shallowly lobed, inner surface glabrous. Anthers 3.5–4.5 mm long. Ovary with Type 2 hairs only. Functional style 5.5–7 mm long, protruding between anthers, glabrous or with Type 2 hairs only.

Fruits. Fruiting calyx lobes exceeding mature fruit, prickles absent. Mature fruits 1–2 per inflorescence, globular, 6–9 mm diameter, red. Mature fruits interior juicy, succulent. Pedicels at fruiting stage 7–12 mm long, 1.5–1.9 mm thick at mid-point. Seeds pale yellow, 2.4–2.7 mm long.

Distribution and habitat. Queensland. Qld: Mitchell, Burke. Shrubby eucalypt woodland, remote from rainforest, lancewood communities (dominated by Acacia catenulata, shirleyi, burrowii, etc.).

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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