Solanum species of eastern and northern Australia
Habit. Erect, rhizomatous perennial shrub, 1–3 m high. Large stems bark furrowed, corky throughout.
Branchlets. Branchlets grey or yellow or rusty or brown. Branchlet prickles absent or present, 0–15 per decimetre, straight, acicular, 4–10 mm long, 9–12 times longer than wide, glabrous. Branchlet hairs stellate. Branchlet stellae dense, 0.4–0.9 mm diameter, stalks 0.1–0.6 mm long. Branchlet stellae lateral rays 4–8, porrect. Branchlet stellae central ray 1–1.5 times as long as laterals, not gland-tipped, rigid.
Leaves. Leaves ovate, entire. Leaves 3–11.5 cm long, 1.1–4.5 cm wide, 2.1–2.7 times longer than broad. Leaf apex acute, base cuneate or obtuse. Leaf oblique part 0–7 mm long, obliqueness index 0–7 percent. Petioles 0.5–1.3 cm long, 8–18% length of lamina, prickles absent.
Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles absent or present on midvein only, 0–2, straight, acicular, 5–7 mm long. Upper leaf surface stellate hairs distributed throughout, protostellae present, hair density sparse to moderate density. Upper leaf surface stellae 0.4–0.7 mm apart, 0.4–0.8 mm across, stalks 0–0.3 mm long. Upper leaf surface stellae lateral rays 4–7, porrect. Upper leaf surface stellae central ray 1–2 times as long as laterals, not gland-tipped. Upper leaf surface simple hairs erect, straight, sparse or moderate to dense, not gland-tipped, 0.1–0.3 mm long. Upper leaf surface Type 2 hairs absent.
Lower leaf surface. Lower leaf surface yellowish or rusty. Lower leaf surface prickles absent. Lower leaf surface stellate hair density dense. Lower leaf surface stellae 0.1–0.3 mm apart, 0.6–1 mm diameter, stalks 0.1–0.7 mm long. Lower leaf surface stellae lateral rays 4–8, porrect. Lower leaf surface stellae central ray 1–2 times as long as laterals, not gland-tipped. Lower leaf surface simple hairs absent. Lower leaf surface Type 2 hairs absent.
Inflorescence. Inflorescence leaf-opposed, cymose (pseudo-racemose). Inflorescence common peduncle 9–12 mm long. Inflorescence rachis prickles absent. Inflorescence 5–8-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 2–8 mm long, same thickness throughout, 0.5–0.7 mm thick at mid-point, prickles absent. Calyx tube at anthesis 1.5–3.5 mm long. Calyx lobes at anthesis deltate or attenuate, 2–5 mm long. Calyx prickles at anthesis absent. Calyx stellae dense, transparent, 0.5–0.8 mm across, stalks 0–0.2 mm long, lateral rays 4–8. Calyx stellae central ray 1–1.5 times as long as laterals, not gland-tipped or gland-tipped. Calyx simple hairs absent, Type 2 hairs present. Corolla mauve or purple, 9–17 mm long, shallowly lobed, inner surface glabrous or sparsely stellate-hairy. Anthers 4.5–7 mm long. Ovary glabrous. Functional style 8.5–10 mm long, protruding between anthers, glabrous or with stellate hairs only. Functional style stellae c. 0.4 mm across, lateral rays c. 4, central ray c. 2 times as long as laterals.
Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1–3 per inflorescence, oblate or globular, 15–21 mm diameter, yellowish-green or green, often streaked, 2-locular. Mature fruits placenta stalked, anvil-shaped. Mature fruits interior moist but not juicy, pericarp 2–2.6 mm thick. Pedicels at fruiting stage 4–8 mm long, 0.6–0.8 mm thick at mid-point. Seeds pale yellow, 2.5 mm long.
Distribution and habitat. Queensland. Qld: Burnett, Maranoa, Leichhardt, Port Curtis, Kennedy South, Kennedy North. Semi-evergreen vine thicket or brigalow/belah, shrubby eucalypt woodland, remote from rainforest.
Miscellaneous. Subg. Leptostemonum. Data source: specimens.
Illustrations. • mature fruit. • bark. • upper 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’.