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Flora of Australia Online

Grevillea parvula Molyneux & Stajsic, Fl. Australia 17A: 502 (2000)

Grevillea victoriae var. leptoneura Benth., Fl. Austral. 5: 468 (1870), as var. ?leptoneura . T: sources of the Genoa river, Vic., F.Mueller recd 1870; lecto: K, fide D.J.McGillivray & R.O.Makinson, Grevillea 447 (1993); remaining syntypes: K, MEL (2 sheets).

Grevillea victoriae 'race f' p.p. , of D.J.McGillivray & R.O.Makinson, Grevillea 321 (1993). 

Grevillea victoriae , unassigned to race p.p. ('Mallacoota Inlet'), of R.O.Makinson, Fl. Victoria 3: 852 (1996). 

Illustrations: J.W.Wrigley & M.Fagg, Banksias, Waratahs & Grevilleas 332 (1991), as Grevillea victoriae var. leptoneura ; D.J.McGillivray & R.O.Makinson, Grevillea 323 (1993), as Grevillea victoriae ; P.M.Olde & N.R.Marriott, Grevillea Book 3: 225 (184G) (1995), as Grevillea victoriae var. leptoneura.

Regenerates from seed.

Shrub, widely spreading or rarely compact, 1–2 m tall. Branchlets tomentose to subvillous. Leaves elliptic to narrowly so or occasionally obovate to oblanceolate, (1.5–) 2.5–4 cm long, (5–) 8–18 mm wide, upper surface smooth, dull, with lateral veins obscure to weakly evident; margins shortly recurved; lower surface densely (very rarely openly) subsericeous to subtomentose. Conflorescence terminal or axillary, usually decurved to pendulous, pedunculate, simple or to 3-branched; unit conflorescence a loose irregular often subsecund cluster, 8–36-flowered; floral rachis 5–16 (–25) mm long. Flower colour: perianth red outside with red hairs, style red or reddish pink. Perianth densely to openly subsericeous outside, bearded inside. Pistil (12–) 17–20 mm long; style with minute hairs towards apex; pollen-presenter lateral or almost so. Follicle (14.5–) 17–19.5 mm long, with faint longitudinal ridges. Fig. 3F.

Occurs in southern N.S.W. (isolated mountains between Eden and the Main Range, and on the Wallagaraugh R. and historically on the Towamba R.) and in Vic. on the upper Genoa R. and lower Wallagaraugh R., also (Molyneux & Stajsic, pers. comm., vouchers not seen) Thurra R. headwaters on E side of Mt Kaye, and NW of Buldah on E side of Errinundra Natl Park. Grows usually near watercourses in forest communities, on granitic and slatey substrates. Flowers Oct.–Mar. (–July). Map 234.

N.S.W.: Mt Kaye, A.C.Beauglehole 34095 (CANB, MEL); Nalbaugh Natl Park, White Rock Mtn, P.Beesley 321 & D.Binns (AD, CANB, MEL, NSW); Letts Mtn, 7 km ESE of Mt Wog Wog, I.R.Telford 6741 (CANB, NSW); spur on E face of Wog Wog Mtn, D.E.Albrecht 965 (CANB, MEL, NSW). Vic.: Wallagaraugh R., upper tidal reaches c. 2 km upstream from Johnstons Bridge, W bank, R.O.Makinson 1648 & B.J.Harrison (AD, BRI, CANB, HO, K, MEL, NE, NSW, PERTH).

A latinised version of the former varietal name, 'var. tenuinervis ', has been applied in the horticultural trade, but has no formal standing.

Grevillea parvula is congruent with those populations of McGillivray & Makinson's 'race f' of G. victoriae that lie in N.S.W., and in Victoria on the catchment of the Wallagaraugh and Genoa Rivers, i.e. those mapped as E of 149º longitude (McGillivray & Makinson, Grevillea 322, map 90 (1993)).

Grevillea parvula has new growth usually pink or purplish pink (rarely green), a leaf length/width ratio 2.5:1 to 4.5:1, and floral rachises with a pale to brownish indumentum. Foliage of plants from higher altitudes tend to have a light green leaf colour, less pronounced pink flushing of the new growth, and a tendency to a denser beard on the inner surface of the perianth.

Grevillea parvula has usually smaller leaves, flowers and follicles as compared with most of its close relatives, and the pollen-presenter strongly concave or rarely flat in cross-section. It has a subglobose, obtuse limb of the flower bud, which is thus round in face view; this is a strong distinguishing character state from G. oxyantha (limb acute, subpyramidal) and G. epicroca (limb of flower bud obtuse but distinctly square in face view).

It is easily distinguished by its tomentose to subvillous branchlets (the hairs spreading) from G. victoriae and G. epicroca , both of which have the branchlets hairs appressed. Other differences from G. victoriae are noted under that species. The strongly pink-flushed new leaf growth of G. parvula also distinguishes it from other taxa in the subgroup (except G. epicroca ).

The lower leaf surface is usually densely hairy, but occasional specimens from Mt Kaye (Vic.) and the upper Genoa R. have an open indumentum resembling that of G. epicroca (see differences above) and G. monslacana .

Other taxa in the subgroup which resemble G. parvula in having spreading branchlet hairs include G. rhyolitica and G. irrasa .

A population near Bemboka, N.S.W., (Telford 11565 ) resembles G. parvula but has a less shaggy indumentum on the branchlets, a tendency towards a squarish limb on the flower bud (due to a median keel on each tepal's limb-segment), and thicker peduncles. It may constitute either a distinct taxon allied to G. parvula , or an intergrade between it and G. oxyantha . See also note under G. epicroca re Minuma Ra. population. Since publication of the Flora of Australia, G. bemboka has been published for the Bemboka population.

(R.O.Makinson)

 

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