Flora of Australia Online
Grevillea micrantha Meisn., Linnaea 26: 358 (1854)
T: 'Australia felix. [Vic.] 1851–52. legit Dr Ferd. Mueller. Grevillea micrantha nob. (5 Sept. 53.) ex Herb. Sonder'; holo: NY n.v. , fide D.J.McGillivray & R.O.Makinson, Grevillea 426 (1993); ?iso: G-DC.
Grevillea linearifolia 'form j' (Western Victorian form) and 'Unassigned 7', of D.J.McGillivray & R.O.Makinson, Grevillea 345–347 (1993).
Illustrations: P.M.Olde & N.R.Marriott, Grevillea Book 3: 23 (bottom right), 24 (14A, B) (1995).
Regenerates from seed and often rhizomes. Presumed insect-pollinated.
Spreading shrub 0.3–0.6 m tall. Branchlets angular and ridged, subsericeous between ridges. Leaves linear to narrowly elliptic or oblanceolate, 1–4 cm long, 0.6–1.0 (–1.5) mm wide, often gently incurved or wavy; upper surface prominently to obscurely 3-ribbed, minutely scabrid at least on ribs; margins vertically refracted about intramarginal vein (leaf oblong in cross-section) and usually abutting midvein; lower surface usually enclosed except for midvein and 2-grooved, occasionally partly exposed and subsericeous. Conflorescence usually terminal, erect, sessile or very shortly pedunculate, regular, umbelloid, c. 6–14-flowered. Flowers adaxially oriented. Flower colour: perianth and style white to pale pink. Perianth subsericeous to sparsely so outside, usually glabrous inside with a discolorous cushion-like pulvinus on each ventral tepal opposite ovary, occasionally pulvinus with a few minute hairs. Pistil 5–6.5 (–8?) mm long; style sharply hooked in apical 2 mm, glabrous except for minute hairs or papillae on back of style-end; pollen-presenter oblique. Follicle narrowly ovoid, 10–11 mm long, glabrous, faintly colliculose. Fig. 23G–I.
Endemic in south-central to south-western Vic.: sporadic occurrences in the area bounded by Brisbane Ra., Mt Macedon, Wedderburn, the eastern fall of the Victoria Ra., and Portland area. Grows in poor stony soils in ironbark or mallee woodland. Flowers Aug.–Jan. Map 219.
Vic.: Mt Clay, N of Portland, E.Finck & A.C.Beauglehole 5878 (MEL); Victoria Ra., E side, Big Cord, Glenelg R., A.C.Beauglehole 22243 (MEL, NSW); Midlands, 6.5 km SW of Wedderburn, Nine Mile South Rd, J.Connock 368 (MEL); on the Wychitella to Wedderburn road, 4 km N of Calder Hwy, T.B.Muir 4904 (K, MEL); Brisbane to Anakie Ra. area, c. 1.6 km SE of Durdiwarrah Reservoir, 30 Sept. 1945, R.V.Smith (K, MEL).
Most populations of G. micrantha have linear leaves 0.8–1.0 mm wide, with the margins fully refracted against the abaxial midvein. There is considerable variation in the coarseness of foliage. Populations in the Portland area, the 'Mt Clay form', have the leaves sublinear to narrowly elliptic or narrowly oblanceolate, to 1.5 mm wide, the margins less refracted with the lower surface often exposed on either side of the midvein, and the veins of the upper surface less granular-scabrid. Some Brisbane Ra. plants also have the leaf lower surface partly exposed; these populations also tend to have fewer-flowered conflorescences.
Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia