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Flora of Australia Online

Grevillea oldei McGill., New Names Grevillea 11 (1986)

T: Dog Trap Rd, about 3 miles [4.8 km] from Ourimbah, N.S.W., 12 Apr. 1972, C.W.E.Moore 6169 ; holo: CANB; iso: CANB.

Illustrations: J.W.Wrigley & M.Fagg, Banksias, Waratahs & Grevilleas 262 (1989); D.J.McGillivray & R.O.Makinson, Grevillea 336, fig. 84, 337, col. pl. (1993); P.M.Olde & N.R.Marriott, Grevillea Book 3: 62 (bottom right), 63 (45A, B) (1995).

Regenerates from seed. Pollinator not known.

Diffuse shrub 0.4–1.2 m tall; branches often arching and subcolumnar. Branchlets angular, villous with spreading hairs. Leaves narrowly ovate to subtriangular, 0.5–3.5 cm long, (1.5–) 3–6 mm wide, (juveniles leaves to 5 cm long and 8 mm wide); upper surface faintly foveolate; margins shortly refracted; lower surface loosely and untidily villous. Conflorescence terminal, usually pedunculate (peduncles pendulous, often conspicuous, wiry, to 5 cm long), sometimes 2-branched; unit conflorescence subglobose. Flowers usually adaxially oriented. Flower colour: perianth and style bright to dark red, white inner beard displayed. Perianth outer surface with loose appressed biramous hairs mixed with erect simple glandular hairs and villous on limb; inner surface bearded. Pistil 9.5–15 mm long; style curved, with scattered papilloid hairs over most of its length; pollen-presenter oblique. Follicle obloid, 14–15 mm long. Fig. 18F–H.

Occurs in N.S.W., north of Sydney, restricted to a small area from Mangrove Mtn to Woy Woy and Gosford. Grows in heath or woodland in well-drained sites in sandy soils over sandstone. Flowers June–Feb. Map 201.

N.S.W.: Mangrove Mtn near road to Somersby Falls, W.F.Blakely & P.Murphy NSW94344 (K, NSW); Penang, J.H.Maiden & J.L.Boorman NSW94350 (NSW); Narara, May 1927, A.Murphy et al. (NSW); Woy Woy, H.M.R.Rupp NSW94351 (NSW).

This species is recognised as 'Rare' in J.D.Briggs & J.H.Leigh, Rare or Threatened Australian Plants (1995).

Grevillea oldei has conspicuously 3-nerved leaves, and has in the past been misidentified as G. trinervis (see G. juniperina subsp. trinervis , which has pistils ≥ 20 mm long and a subsericeous lower leaf surface). The leaves often twist distinctively on drying. Grevillea diffusa subsp. filipendula occurs at a distance of a few kilometres, and differs in its much longer, sublinear leaves, and lack of erect glandular hairs on the outer surface of the perianth. Just beyond the west of the range (Kulnura area), there is an extended zone of apparent hybridity with G. speciosa (see comments under that species).

(R.O.Makinson)

 

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