Solanum species of eastern and northern Australia
Habit. Erect, rhizomatous perennial shrub, 0.3–1 m high. Large stems bark corky on trunk.
Branchlets. Branchlets terete or ridged, yellow or rusty or brown. Branchlet prickles 30–160 per decimetre, straight, acicular, 1–5 mm long, 10–16 times longer than wide, glabrous or with dense stellate hairs on lower part. Branchlet hairs stellate. Branchlet stellae very dense, 0.25–0.7 mm diameter, stalks 0–0.7 mm long. Branchlet stellae lateral rays 6–9, ascending. Branchlet stellae central ray 1–2 times as long as laterals, not gland-tipped, thready or rigid.
Leaves. Leaves ovate or broadly ovate, entire. Leaves 3.5–7.5 cm long, 1.5–3.5 cm wide, 1.7–2.3 times longer than broad. Leaf apex acute, base obtuse or cordate. Leaf oblique part 0–3 mm long, obliqueness index 0–6 percent. Petioles 0.8–2.6 cm long, 16–35% length of lamina, prickles absent or present.
Upper leaf surface. Upper leaf surface grey. Upper leaf surface prickles absent. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density very dense. Upper leaf surface stellae c. 0.05 mm apart, 0.5–0.7 mm across, stalks 0–0.7 mm long. Upper leaf surface stellae lateral rays 6–8, porrect. Upper leaf surface stellae central ray 1.2–2.5 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 or yellowish. Lower leaf surface prickles absent. Lower leaf surface stellate hair density dense to very dense. Lower leaf surface stellae 0.05–0.1 mm apart, 0.4–0.8 mm diameter, stalks 0–1 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 1.5–2 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, solitary or cymose (pseudo-racemose). Inflorescence common peduncle 5–14 mm long. Inflorescence rachis prickles absent. Inflorescence 1–2-flowered, with one bisexual flower, the rest male or some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 4–11 mm long, same thickness throughout or markedly thicker distally, 1.1–1.5 mm thick at mid-point, prickles absent. Calyx tube at anthesis 3.5–5 mm long. Calyx lobes at anthesis deltate, 4–7 mm long. Calyx prickles at anthesis absent. Calyx stellae very dense, transparent or brown or rusty, 0.5–0.7 mm across, stalks 0.3–0.9 mm long, lateral rays 7–8. Calyx stellae central ray 1–2 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla white or mauve or purple, 12–17 mm long, shallowly lobed or deeply lobed, inner surface densely stellate-hairy. Anthers 5.5–7.5 mm long. Ovary glabrous or with Type 2 hairs only. Functional style 10.5–12.5 mm long, protruding between anthers, glabrous.
Fruits. Fruiting calyx lobes less than half length of mature fruit or lobes more than half length of mature fruit, prickles absent. Mature fruits 1 per inflorescence, globular, 14–18 mm diameter, yellowish-green or green, often streaked, 4-locular. Mature fruits placenta stalked, circular to elliptical. Mature fruits interior moist but not juicy, pericarp 2.4–3 mm thick. Pedicels at fruiting stage 7–13 mm long, 1.3–1.5 mm thick at mid-point. Seeds black, 2.5–2.8 mm long.
Distribution and habitat. Queensland. Qld: Mitchell, Kennedy North, Burke. Shrubby eucalypt woodland, remote from rainforest.
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’.