Acacia aneura

F.Muell. ex Benth. (1855)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Fabales Family: Fabaceae Genus: Acacia

mulga, mulga acacia

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Description

Key Characters:

Growth Form: Shrub or tree 2.5–7 (–10 m) high, often multi–stemmed with bushy crowns.

Stems: Branchlets obscurely ribbed or ribless, ribs not resinous or with a normally thin layer of translucent resin, new shoots resinous, with a dense layer of dark-colored glandular hairlets.

Roots:

Leaves: Leaves simple, modified into phyllodes. Alternate. Phyllodes narrowly linear to linear-elliptic, mostly shallowly incurved, not rigid, flat, 4–12 (–18) cm long, (1–) 1.5–3 (–4) mm wide. Blades glabrous or obscurely appressed-hairy between veins, normally grey-green to subglaucous and often with a silvery sheen. Longitudinal veins numerous and very fine, margins not resinous; gland 0–1(–3) mm above pulvinus.

Flowers: Inflorescences mostly simple; peduncles 4–10 (–15) mm long, sparsely to ± densely sericeous with commonly some red-brown glandular hairlets; spikes (10–) 15–30 (–40) mm long. Flowers 5-merous. Calyx of 5 sepals; Sepals free, ½–¾ length of petals, normally linear-spathulate. Corolla of 5 petals.

Fruit: Pods mostly straight-edged; flat; (1–) 1.5–4 cm long; (6–) 7–15 mm wide including the wing 0.4–1 (–2) mm wide; chartaceous to firmly chartaceous; normally brown to grey-brown; glabrous or sparsely appressed puberulous; obscurely reticulate; margins winged or rarely bevel-edged; often shiny-resinous. Seeds transverse to oblique; 3.5–5 mm long; 2.5–3 (–3.5) mm wide; elliptic to oblong or ovate; aril small; whitish or cream.

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Only found in cultivation
Molokai Only found in cultivation
Lana'i Naturalized
Kaho'olawe Only found in cultivation

Dispersal Agents

Forestry

Pollinators

Bibliography

Name Published In: Linnaea 26: 627 (1855)

Other References

Wagner & Herbst 1995:19 (NEWNAT/L, DESCR)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Acacia aneura Honouliuli Forest Reserve, Manawahua, No. 1 gate Preserved_Specimen Judd, C.S. Oahu BISH 1939-04-12
2 Acacia aneura Kaluakoi, Puu Nana Preserved_Specimen Herbst, D.R. 5719 Molokai BISH 1976-03-08
3 Acacia aneura Kiei Gulch, W of Lanai City and N of Kaumalapau dry, grass; with Leucaena, Sida, Casuarina, Panicum Preserved_Specimen Wood, K.R. 336 Lanai BISH 1980-05-14
4 Acacia aneura Hillside above Ku Heia Ranch site Grove of trees evidently planted. Preserved_Specimen Grove of trees evidently planted. Trees 5-8ft tall; ca. 50 trees in grove. Flowers yellowish. Pope, B. Kahoolawe BISH 1994-12-28
5 Acacia aneura Kaumalapau Hwy. Widely naturalized around quarry and nearby areas. Growing with Dodonaea and Waltheria in coastal dry scrub. Preserved_Specimen Naturalized. Starr, F. 7040205 Lanai BISH 2007-04-02
6 Acacia aneura Kaluakoi District, Puu Nana Preserved_Specimen Tree with silvery foliage; deep yellow flowers. Tree 25 ft. tall with a 10 in DBH. Herbst, D.R. 5719 Molokai BISH 1976-03-08
7 Acacia aneura Lower Kaumalapau Preserved_Specimen 7 m tree, tough, stiff branched Hobdy, R.W. 1966 Lanai BISH 1984-02-18
8 Acacia aneura Maunalani Heights, Kaimuki, Honolulu Preserved_Specimen Ornamental. Whitish slender shrub, 2.5 m. tall. Fosberg, F.R. 29537 Oahu BISH 1948-02-13