Eucalyptus ×macmahonii Rule

Muelleria 10: 13 (1997) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: rare (r)

Mallee to 5 m tall; bark smooth throughout or with loose ribbons at base. Juvenile leaves petiolate, alternate, lanceolate or elliptic-lanceolate, to 8 cm long, 2.5 cm wide, slightly discolorous, dull, grey-green; adult leaves petiolate, alternate, narrow-lanceolate or lanceolate, 7–11 cm long, 0.8–1.5 cm wide, concolorous, glossy, green; reticulation dense, with numerous island and intersectional oil glands. Inflorescences axillary, unbranched; peduncles slightly flattened, to 1.2 cm long, 7–11-flowered; buds shortly pedicellate, ovoid or slightly clavate, to 0.9 cm long, 0.5 cm diam., scar present; operculum conical, outer operculum often incompletely shed; stamens inflexed; anthers versatile, dorsifixed, oblong; ovules in 4 vertical rows; flowers white. Fruit shortly pedicellate or sessile, cupular or subcylindric, to 0.9 cm long, 0.8 cm diam.; disc descending; valves (3)4, below rim level; seeds red-brown, reticulate, flattened, hilum ventral.   

Recorded from the southern base of Mt Arapiles and south of the Little Desert near Nurcoung, but probably occurs more widely throughout the Wimmera region, found in mallee communities on sandy soils.

Apparently a stabilised hybrid between Eucalyptus phenax and E. wimmerensis. Distinguished from the former by the smooth operculum that often retains fragments of the incompletely shed outer operculum, the more slender peduncles and fruits that are usually on short pedicels, and from the latter by the glossy, green leaves, larger fruit and buds, and shorter pedicels.

Created by: Andre Messina, 2016-08-17
Updated by: Val Stajsic, 2018-05-11
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life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Myrtales
family Myrtaceae
genus Eucalyptus
Higher taxa