Solanum species of eastern and northern Australia
Habit. Sprawling or erect, perennial vine, 1–2 m high.
Branchlets. Branchlets rusty or brown. Branchlet prickles 70–90 per decimetre, curved, broad-based, 2–4 mm long, 2.5–4 times longer than wide, glabrous or with scattered stellate hairs on lower half. Branchlet hairs stellate. Branchlet stellae sparse to moderate to dense, 0.2–0.3 mm diameter, stalks 0–0.1 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, thready.
Leaves. Leaves broadly ovate, shallowly lobed throughout. Leaf lobes 5–7 on each side, acute, lobing index 1.1–1.3. Leaves 8–12 cm long, 5–7.5 cm wide, 1.4–1.8 times longer than broad. Leaf apex acute or acuminate, base cuneate. Leaf oblique part 0–7 mm long, obliqueness index 0–7 percent. Petioles 1.6–3 cm long, 20–30% length of lamina, prickles present.
Upper leaf surface. Upper leaf surface green. Upper leaf surface prickles present on midvein and lateral veins, 40–120, straight, acicular, 3–11 mm long. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density very sparse to sparse. Upper leaf surface stellae 0.6–1.4 mm apart, 0.2–0.35 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 or yellowish. Lower leaf surface prickles present on midvein and lateral veins, 15–30, straight, acicular or straight, broad-based. Lower leaf surface stellate hair density dense to very dense. Lower leaf surface stellae 0.05–0.2 mm apart, 0.25–0.35 mm diameter, stalks 0 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.3–0.6 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 or present. Inflorescence 7–10-flowered, with some bisexual and some male flowers. Flowers 5-merous. Pedicels at anthesis 12–18 mm long, same thickness throughout, 0.5–0.6 mm thick at mid-point, prickles absent or present. Calyx tube at anthesis 2.5–3.5 mm long. Calyx lobes at anthesis deltate or rostrate, 0.5–3 mm long. Calyx prickles at anthesis absent. Calyx stellae dense, yellow or white or purple, 0.2–0.3 mm across, stalks 0 mm long, lateral rays 7–8. Calyx stellae central ray 0.4–1 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla mauve, 9–14 mm long, deeply lobed, inner surface sparsely stellate-hairy. Anthers 5.5–6.5 mm long. Ovary with stellate hairs only. Functional style c. 8.5 mm long, protruding between anthers, with stellate hairs only. Functional style stellae c. 0.2 mm across, lateral rays 6–8, central ray c. 1 times as long as laterals.
Fruits. Fruiting calyx lobes less than half length of mature fruit, prickles absent. Mature fruits 1 per inflorescence, 17 mm diameter, orange. Pedicels at fruiting stage 23–28 mm long, 1–1.3 mm thick at mid-point. Seeds pale yellow, 1.9–2.4 mm long.
Distribution and habitat. Queensland. Qld: Cook. Evergreen notophyll rainforest (no eucalypts).
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’.