Solanum species of eastern and northern Australia

DELTA Home

A. R. Bean

Solanum jucundum

Habit. Erect, rhizomatous perennial shrub, 0.7–1.8 m high.

Branchlets. Branchlets grey or yellow or rusty. Branchlet prickles absent or present, 0–10 per decimetre, straight, acicular or straight, broad-based, 6–10 mm long, 6–14 times longer than wide, glabrous or with scattered stellate hairs on lower half. Branchlet hairs stellate. Branchlet stellae very dense, 0.15–0.4 mm diameter, stalks 0–0.4 mm long. Branchlet stellae lateral rays 8–11, porrect or ascending or multiradiate. Branchlet stellae central ray 1–1.5 times as long as laterals, not gland-tipped, thready.

Leaves. Leaves lanceolate or ovate, entire. Leaves 2.5–8.5 cm long, 1.1–2.3 cm wide, 2.3–3.6 times longer than broad. Leaf apex acute, base obtuse or cordate. Leaf oblique part 0–3.5 mm long, obliqueness index 0–4 percent. Petioles 0.4–1.3 cm long, 10–20% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface grey-green or grey. Upper leaf surface prickles absent. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density moderate density to very dense. Upper leaf surface stellae 0.05–0.1 mm apart, 0.2–0.4 mm across, stalks 0 mm long. Upper leaf surface stellae lateral rays 6–8, porrect or ascending. 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 present throughout. Upper leaf surface Type 2 hairs 0.5–1 mm apart.

Lower leaf surface. Lower leaf surface yellowish or rusty. Lower leaf surface prickles absent. Lower leaf surface stellate hair density very dense. Lower leaf surface stellae 0.05–0.1 mm apart, 0.2–0.4 mm diameter, stalks 0–0.3 mm long. Lower leaf surface stellae lateral rays 7–9, porrect. Lower leaf surface stellae central ray 0.7–1.4 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 6–12 mm long. Inflorescence rachis prickles absent. Inflorescence 2–5-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 3–10 mm long, markedly thicker distally, 1–2 mm thick at mid-point, prickles absent. Calyx tube at anthesis 2.5–4.5 mm long. Calyx lobes at anthesis rostrate or attenuate, 1–10 mm long. Calyx prickles at anthesis absent. Calyx stellae very dense, yellow or white or brown or rusty, 0.3–0.5 mm across, stalks 0.1–0.4 mm long, lateral rays 7–10. Calyx stellae central ray 0.8–1.5 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla mauve or purple, 10–14 mm long, deeply lobed, inner surface densely stellate-hairy. Anthers 4.5–6.5 mm long. Ovary with Type 2 hairs only or with stellate and Type 2 hairs. Functional style 8–10 mm long, protruding between anthers, with Type 2 hairs only.

Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1 per inflorescence, globular, 13–16 mm diameter, yellowish-green or green, often streaked, 4-locular. Mature fruits placenta stalked, anvil-shaped. Mature fruits interior moist but not juicy, pericarp 0.8–1.1 mm thick. Pedicels at fruiting stage 5–15 mm long, 0.8–2.5 mm thick at mid-point. Seeds pale yellow or black, 2.5–3.5 mm long.

Distribution and habitat. Queensland, New South Wales. Qld: Darling Downs, Burnett, Maranoa, Leichhardt, Warrego, Port Curtis. NSW: North-west Slopes, Central-west Slopes, North Western Plains. Shrubby eucalypt woodland, remote from rainforest, lancewood communities (dominated by Acacia catenulata, shirleyi, burrowii, etc.).

Miscellaneous. Subg. Leptostemonum. Data source: specimens.

Illustrations. • flowers and fruits. • plant. • type specimen.


Cite this publication as: ‘Bean, A.R. 2012 onwards. Solanum species of eastern and northern Australia. Version: 29th June 2013. http://delta-intkey.com’.

Contents