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Flora of Australia Online

Banksia plagiocarpa A.S.George, Nuytsia 3: 467 (1981)
Dallachy's Banksia

T: Mt Bowen, Hinchinbrook Island, Qld, 15 June 1981, A. & M.Thorsborne & M.Godwin C1833 ; holo: BRI; iso: CANB, K, NSW, PERTH.

Illustrations: A.S.George, Banksia Book 64, 65, fig. 7, pl. 27 (1984); C.E.Rosser & A.S.George, Banksias III: pl. 65 (in press).

Shrub to 5 m, fire tolerant? Bark fissured, corky, grey-brown. Stems red-velvety, glabrescent after 2–3 years. Leaves alternate; petiole 5–20 mm long; lamina lanceolate to narrowly obovate, 8–20 cm long, 6–17 mm wide, obtuse; margins recurved, obtusely serrate to entire; upper surface tomentose, rusty, glabrescent; lower surface tomentose, glabrescent on nerves. Inflorescence 7–14 cm long; involucral bracts thick, tomentose, persistent. Flowers pale blue-grey to mauve in late bud, with limb pale pink-brown in upper half, all becoming dull yellow when open; style pale yellow. Perianth 22–25 mm long including limb of 4–5 mm, appressed-pubescent outside, glabrous inside. Pistil straight or gently curved, 26–28 mm long, glabrous; pollen presenter 0.5–0.7 mm long, scarcely thicker than style. Old flowers soon falling. Follicles up to c. 60, turned somewhat upwards, narrowly elliptic, 12–16 mm long, 5–10 mm high, 5–8 mm wide; valves obliquely triangular, obtuse, smooth, closely tomentose. Seed obovate, 15–17 mm long; seed body obovate, 8–9 mm long, 3–4 mm wide, slightly rugose or smooth. Fig. 25A–E.

Occurs in Qld, on Hinchinbrook Is. and the adjacent mainland. Grows in sandy loam or clay-loam on rocky, granite slopes, in closed shrubland and low shrubland. Flowers Feb.–July. Map 180.

Qld: Coast Ra., 21 Feb. 1868, J.Dallachy (K, MEL); E spur of Bishop Peak, Cardwell Ra., I.R.Telford 9244 & G.Butler (CANB, NSW).

Probably fire-tolerant, sprouting by epicormic shoots. Some follicles open after 2–3 years; the others remain closed until burnt. New growth bright rusty red, velvety. Related to B. oblongifolia which is a shrub with several slender stems arising from a lignotuber, smaller leaf serrations, yellower flowers, and smaller, evenly rounded follicles.



Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia