Solanum species of eastern and northern Australia
Habit. Erect, rhizomatous perennial shrub, 0.4–1.5 m high.
Branchlets. Branchlets terete or ridged, yellow or rusty. Branchlet prickles present, 700–1200 per decimetre, straight, acicular, 4–9 mm long, 9–12 times longer than wide, with dense stellate hairs on lower part. Branchlet hairs stellate. Branchlet stellae very dense, 0.5–0.8 mm diameter, stalks 0–1 mm long. Branchlet stellae lateral rays 7–8, porrect or ascending. Branchlet stellae central ray 0.8–1.2 times as long as laterals, not gland-tipped, thready. Branchlet Type 2 hairs absent.
Leaves. Leaves ovate, entire. Leaves 7.1–14 cm long, 3.9–7.1 cm wide, 1.8–2.3 times longer than broad. Leaf apex acute, base cuneate or obtuse. Leaf oblique part 0–9 mm long, obliqueness index 0–7 percent. Petioles 1–2 cm long, 8–18% length of lamina, prickles present.
Upper leaf surface. Upper leaf surface yellowish or grey. Upper leaf surface prickles present on midvein only, 6–16, straight, acicular or straight, broad-based, 3–7 mm long. Upper leaf surface stellate hairs distributed throughout, protostellae absent, hair density very dense. Upper leaf surface stellae 0–0.05 mm apart, 0.6–0.9 mm across, stalks 0–0.9 mm long. Upper leaf surface stellae lateral rays 7–8, porrect. Upper leaf surface stellae central ray 0.6–1 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 only or present on midvein and lateral veins, 9–28, straight, acicular. Lower leaf surface stellate hair density very dense. Lower leaf surface stellae 0–0.05 mm apart, 0.6–0.9 mm diameter, stalks 0–0.8 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.7–1.1 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 14–25 mm long. Inflorescence rachis prickles present. Inflorescence 15–30-flowered, with one bisexual flower, the rest male. Flowers 5-merous, markedly dimorphic, with larger pricklier basal flower(s). Pedicels at anthesis 5–11 mm long, same thickness throughout. Calyx prickles on basal bisexual flowers 70–130. Calyx prickles on distal male flowers 0–20, 2–3.5 mm long. Calyx tube at anthesis 3–5 mm long. Calyx lobes at anthesis deltate, 1–6 mm long. Calyx prickles at anthesis absent or present, 0–130 per flower, 2–3.5 mm long (males only). Calyx stellae very dense, transparent, 0.7–0.9 mm across, stalks 0.1–1 mm long, lateral rays 7–9. Calyx stellae central ray 1–1.4 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 11–13 mm long, rotate, inner surface glabrous or sparsely stellate-hairy. Anthers 6.6–7.8 mm long. Filaments 1–1.5 mm long.
Fruits. Fruiting calyx lobes more than half length of mature fruit. Mature fruits 1 per inflorescence, globular, 30–38 mm diameter, yellow, 2-locular. Mature fruits placenta stalked, anvil-shaped. Pedicels at fruiting stage 22–43 mm long, 2.3–3.3 mm thick at mid-point. Seeds black, 2.5–3.2 mm long.
Distribution and habitat. Western Australia.
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’.