Solanum species of eastern and northern Australia

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A. R. Bean

Solanum galbinum

Habit. Erect, rhizomatous perennial shrub, 0.5–1.5 m high.

Branchlets. Branchlets rusty or brown. Branchlet prickles 10–40 per decimetre, straight, acicular, 3–8 mm long, 8–13 times longer than wide, glabrous. Branchlet hairs stellate. Branchlet stellae very dense, 0.35–0.5 mm diameter, stalks 0 mm long. Branchlet stellae lateral rays 7–8, porrect. Branchlet stellae central ray 0.4–0.8 times as long as laterals, not gland-tipped.

Leaves. Leaves linear, entire. Leaves 4–7 cm long, 0.3–0.7 cm wide, 8.5–17 times longer than broad. Leaf apex obtuse or acute, base cuneate. Leaf oblique part 0–2 mm long, obliqueness index 0–3 percent. Petioles 0.2–0.3 cm long, 3–7% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles absent or present on midvein only, 0–6, straight, acicular, 1.5–7 mm long. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density sparse to moderate density. Upper leaf surface stellae 0.15–0.4 mm apart, 0.2–0.3 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 7–8, porrect. Upper leaf surface stellae central ray 0.7–1.3 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 very dense. Lower leaf surface stellae c. 0.05 mm apart, 0.4–0.5 mm diameter, stalks 0–0.15 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.4–0.8 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, sessile (rachis very short or absent) or cymose (pseudo-racemose). Inflorescence common peduncle absent or present, 0–4 mm long. Inflorescence rachis prickles absent. Inflorescence 4–9-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 4–6 mm long, same thickness throughout, 0.4–0.6 mm thick at mid-point, prickles absent. Calyx tube at anthesis 1–2 mm long. Calyx lobes at anthesis deltate, 1.5–2.5 mm long. Calyx prickles at anthesis absent. Calyx stellae very dense, purple or brown or rusty, 0.25–0.35 mm across, stalks 0–0.1 mm long, lateral rays 8–9. Calyx stellae central ray 0.6–1.4 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla white or mauve, 7–11 mm long, deeply lobed, inner surface sparsely stellate-hairy. Anthers 4–5.5 mm long. Ovary with stellate hairs only or with Type 2 hairs only. Functional style 8–9.5 mm long, protruding between anthers, with Type 2 hairs only or with stellate and Type 2 hairs. Functional style stellae 0.3–0.4 mm across, lateral rays 5–7, 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 1–4 per inflorescence, globular, 10–15 mm diameter, yellowish-green or green, often streaked, 1-locular (septum absent or incomplete). Mature fruits placenta sessile, semi-circular. Mature fruits interior juicy, succulent or moist but not juicy, pericarp 0.3–0.4 mm thick. Pedicels at fruiting stage 5–9 mm long, 0.5–0.9 mm thick at mid-point. Seeds pale yellow, 3.5–4 mm long.

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

Miscellaneous. Subg. Leptostemonum. Data source: specimens.

Illustrations. • galbinum_31815_03.jpg. • galbinum_31815_02.jpg. • galbinum_31815_01.jpg. • leaf surface.


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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