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Flora of Australia Online

Dryandra trifontinalis A.S.George, Nuytsia 10: 337 (1996)

T: W of Three Springs on Nebru Rd, W.A., 6 Aug. 1986, A.S.George 16789 ; holo: PERTH; iso: CANB, K, MEL, NSW, PERTH.

Openly branched shrub to 2 m, without lignotuber. Stems sparsely hirsute, soon glabrous. Leaves sessile or with petiole to 10 mm long; lamina broadly linear, 3–16 cm long, 10–18 mm wide, acute, pungent, closely tomentose below; margins recurved, coarsely serrate; teeth 5–10 each side, broadly obliquely triangular, pungent. Inflorescence on lateral branchlet to 1 cm long, occasionally terminal; involucral bracts ovate to lanceolate, acute, to 10 mm long, glabrous or scurfy, shortly ciliate; flowers 55–65 per head. Perianth 24–25 mm long, pale yellow, curled-tomentose above base, hirsute distally; limb 3–4 mm long, glabrous. Pistil ±straight, 25–26 mm long, pale yellow, glabrous except silky apex of ovary; pollen presenter 1.8–2 mm long, smooth. Follicles oblong to ovate, 6–9 mm long, sparsely hairy, striate. 

Restricted to a few populations near Three Springs, W.A. Grows in lateritic soil in low woodland. Flowers Aug.–Sept. Map 287.

W.A.: W of Three Springs, J.S.Beard 7251 (PERTH); Three Springs, W.E.Blackall 4878 (PERTH).

Most closely related to D. wonganensis , differing in the coarsely-lobed leaves and smaller flowers. Also similar to D. hewardiana which has the inflorescences on longer branchlets, pubescent involucral bracts with densely ciliate margins, a smaller perianth limb and smaller pollen presenter. Flowers not scented.

Since publication of the Flora of Australia the Australian Plant Census accepts A.R.Mast & K.R.Thiele's transfer of Dryandra to Banksia in Austral. Syst. Bot. 20: 63–71 (2007). As a result this taxon is treated under Banksia trifontinalis .

(A.S.George)

 

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