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Flora of Australia Online

Banksia dentata L.f., Suppl. Pl. 127 (1782)
Tropical Banksia

Sirmuellera dentata (L.f.) Kuntze, Revis. Gen. Pl. 2: 582 (1891); Isostylis dentata (L.f.) Britten, in J.Banks & D.Solander, Ill. Austral. Pl. Cook's Voy. 3: 84 (1905). T: Endeavour R., [Qld], June–July 1770, J.Banks & D.Solander ; lecto: BM, fide A.S.George, Nuytsia 3: 275 (1981); isolecto: B, BM, MEL, NSW.

Banksia procumbens Dum.-Cours., Bot. Cult. 2nd edn, 7: 107 (1814), nom. inval. — in synonymy under Banksia dentata.  

Illustrations: C.E.Rosser & A.S.George, Banksias I: pl. 4 (1981); A.S.George, Banksia Book 47, 48, fig. 1, pl. 18 (1984).

Tree to 7 m tall, fire tolerant. Bark roughly tessellated. Stems tomentose, at length glabrescent. Leaves alternate, scattered; petiole 5–10 mm long; lamina undulate, narrowly obovate, 9–22 cm long, 2–9 cm wide, acute; margins slightly recurved, irregularly dentate; upper surface velvety, glabrescent; lower surface closely white-tomentose. Inflorescence 5–15 cm long; involucral bracts narrowly triangular to subulate on thick base, tomentose, persistent. Flowers cream to pale yellow, including style. Perianth 25–32 mm long including limb of 5 mm, closely pubescent to hirsute outside, sparsely hirsute inside above middle. Pistil slightly recurved, 31–46 mm long, glabrous; pollen presenter 1 mm long, scarcely distinguishable from style. Old flowers soon falling. Follicles commonly 30–60 but sometimes to 100, narrowly elliptic, 15–20 mm long, 4–8 mm high; valves semi-elliptic, smooth, velvety, glabrescent. Seed obovate, 18–21 mm long; seed body obliquely obovate, 10–12 mm long, 5–8 mm wide. 

In Australia, from Bedford Downs and the Isdell Ra., W.A., through the 'Top End' of the N.T. to Cape York Peninsula, Qld, extending south to the Bloomfield R.; apparently absent south of the Gulf of Carpentaria. Also in Papua New Guinea, Irian Jaya and the Aru Is. Usually on seasonally moist sandy flats, sometimes among sandstone or quartzite rocks, in woodland; sometimes by creeks and in gorges. Flowers Nov.–June. Map 175.

W.A.: 79 km N of Drysdale Stn, D.E.Symon 7100 (AD, PERTH). N.T.: Black Jungle, near Darwin, Mar. 1956, N.G.Eddy (DNA); Little Lagoon, Groote Eylandt, R.L.Specht 214 (BRI, PERTH). Qld: Horn Is., Torres Strait, E.Cameron 2126 (QRS); NE of Iron Ra., 12 Apr. 1944, H.Flecker (BRI, JCT).

This is the only species of Banksia that occurs naturally outside Australia. Follicles opening within a year.

(A.S.George)

 

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