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Acacia anceps x nematophylla

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Acacia anceps x nematophylla

Bushy shrub 0.5–2.5 m tall. Branchlets glabrous. Phyllodes occasionally +/- continuous with branchlets, oblanceolate to linear-oblanceolate, obtuse to sub-acute, 12–55 mm long, 2–15 mm wide, straight to shallowly curved, green to sub-glaucous, midrib evident; pulvinus distinct or poorly developed. Inflorescences simple, initiated synchronously with phyllodes on new shoots and can appear falsely racemose when subtending phyllodes are not fully developed; peduncles 11–25 mm long, glabrous; heads globular, densely 40–84-flowered. Flowers 5-merous; sepals clearly united. Legumes narrowly oblong, often constricted between seeds, 5–7 cm long, 7–12 mm wide, coriaceous, crustaceous or woody, glabrous. Seeds transverse, elliptic, compressed, 4–5 x c. 4 mm, dull, black; funicle dark red (when dry), half or more encircling seed; aril clavate.

Occurs in coastal areas of southern Eyre and Yorke Peninsulas, S.A., where often locally common. Grows in sand and limestone.

These hybrid plants possess various combinations of characters which are intermediate between the two putative parents, A. anceps "winged variant" and A. nematophylla , namely, phyllode width and texture, legume width and number of flowers per head. Also, they often exhibit considerable morphological variation, especially in phyllode width. The hybrids superficially resemble the "typical variant" of A. anceps , which can be distinguished by its larger, oblanceolate, light green phyllodes and which does not occur on Yorke Peninsula or southern Eyre Peninsula.). Also resembles A. cupularis which can be distinguished by its linear phyllodes, short racemes and longitudinally oriented seeds.

This hybrid is discussed and illustrated in B.R.Maslin and D.J.E.Whibley, Nuytsia 6(1): 28, 31(1987).

Representative collections

S.A. Sturt Bay, c. 15 km S of Warooka, B.R.Maslin 4540 (PERTH). 28 miles from Yorketown, toward Foul Bay, M.B.Phillips SA/66 429 (AD, CBG). Point Davenport, F.D.Morgan 20/8/1977 ( AD, BH, L, NSW. ). Cape Donnington, C.R.Alcock C138 (AD).

(BRM & MO’L)

In Fl. Australia this taxon was noted under A. anceps and A. nematophylla.

WATTLE Acacias of Australia CD-ROM graphic

The information presented here originally appeared on the WATTLE CD-ROM which was jointly published by the Australian Biological Resources Study, Canberra, and the Department of Parks and Wildlife, Perth; it was produced by CSIRO Publishing from where it is available for purchase. The WATTLE custodians are thanked for allowing us to post this information here.

Page last updated: Tuesday 11 September 2018