Solanum species of eastern and northern Australia

DELTA Home

A. R. Bean

Solanum wilkinsii

Habit. Prostrate or sprawling, rhizomatous perennial shrub, 0.1–0.8 m high.

Branchlets. Branchlets mauve to purple or yellow or rusty or brown. Branchlet prickles absent or present, 0–230 per decimetre, straight, acicular, 0.5–3 mm long, 6–9 times longer than wide, glabrous. Branchlet hairs stellate. Branchlet stellae very dense, 0.3–0.5 mm diameter, stalks 0–0.3 mm long. Branchlet stellae lateral rays 7–8, porrect. Branchlet stellae central ray 0.8–1.2 times as long as laterals, not gland-tipped. Branchlet Type 2 hairs absent.

Leaves. Leaves ovate (sometimes narrowly ovate), entire. Leaves 4.1–8.3 cm long, 1.9–3.3 cm wide, 2.2–3.5 times longer than broad. Leaf apex acute, base cuneate or obtuse. Leaf oblique part 0–10 mm long, obliqueness index 0–12 percent. Petioles 0.9–3 cm long, 18–42% length of lamina, prickles absent.

Upper leaf surface. Upper leaf surface green or grey-green. Upper leaf surface prickles absent. Upper leaf surface stellate hairs distributed throughout, hair density sparse or moderate density. Upper leaf surface stellae 0.2–0.4 mm apart, 0.3–0.4 mm across, stalks 0–0.1 mm long. Upper leaf surface stellae lateral rays 7–8, porrect. Upper leaf surface stellae central ray 0.8–1.2 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. Lower leaf surface prickles absent. Lower leaf surface stellate hair density very dense. Lower leaf surface stellae 0.05 mm apart, 0.3–0.4 mm diameter, stalks 0–0.1 mm long. Lower leaf surface stellae lateral rays 7–8, porrect. Lower leaf surface stellae central ray 0.8–1.2 times as long as laterals, not gland-tipped. Lower leaf surface simple hairs absent. Lower leaf surface Type 2 hairs absent.

Inflorescence. Inflorescence supra-axillary, cymose (pseudo-racemose). Inflorescence common peduncle 8–23 mm long. Inflorescence rachis prickles present. Inflorescence 3–5-flowered, with all flowers bisexual. Flowers 5-merous. Pedicels at anthesis 4–9 mm long, prickles absent or present. Calyx tube at anthesis 2.5–3.5 mm long. Calyx lobes at anthesis deltate or attenuate, 2–6 mm long. Calyx prickles at anthesis absent or present, 0–60 per flower, 0.5–5 mm long. Calyx stellae very dense, yellow or brown or rusty, 0.3–0.45 mm across, stalks 0–0.3 mm long, lateral rays 7–8. Calyx stellae central ray 0.8–1.2 times as long as laterals, not gland-tipped. Calyx simple hairs absent, Type 2 hairs absent. Corolla purple, 12–16 mm long, rotate, inner surface glabrous. Anthers 4.1–5.5 mm long. Filaments 2–2.8 mm long. Ovary glabrous. Functional style 11 mm long (c.), protruding between anthers or strongly bent near base, not touching anthers, glabrous.

Fruits. Fruiting calyx hypanthium accrescent, enclosing most or all of mature fruit, prickles present, prickles 1.5–8 mm long. Mature fruits 1–2 per inflorescence, oblate, 15 mm diameter (c.). Pedicels at fruiting stage 8–14 mm long, 0.7–1 mm thick at mid-point.

Distribution and habitat. Northern Territory.

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’.

Contents