Acacia subtessarogona

Acacia subtessarogona, commonly known as spreading gidgee, is a tree in the family Fabaceae and the subgenus Juliflorae that is native to a small area in western Australia.

Spreading gidgee
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Clade: Mimosoideae
Genus: Acacia
Species:
A. subtessarogona
Binomial name
Acacia subtessarogona
Occurrence data from AVH

Description

Spreading gidgee grows as an upright tree to a height of up to 8 m (26 ft) and has ribbed branchlets that are densely hired between each of the ribs. Like most Acacia species, it has phyllodes rather than true leaves. These are flat, curved, and have a length of about 7 to 13 cm (2.8 to 5.1 in) and a width of 4 to 9 mm (0.16 to 0.35 in) and have longitudinal striations. When it between July and October[1] it produces simple inflorescences that occur in groups of one to five in the axils on 4 to 8 mm (0.16 to 0.31 in) long stalks. The flower-heads are a short cylindrical shape with a length of 6 to 12 mm (0.24 to 0.47 in) and densely packed with yellow flowers. The seed pods that form after flowering have a length of 6 to 12 cm (2.4 to 4.7 in) with a distinctive groove along each edge. The seeds insode are 5 to 6.5 mm (0.20 to 0.26 in) long and have an obloid shape.[2]

Distribution

Endemic to Western Australia, it occurs only in a small area of the Gascoyne River catchment near Carnarvon with outlying population near Wiluna.[2] It is often found situated in low lying area, along creeklines[1] or on rocky ground growing in red loamy soils and is commonly associated with Acacia sclerosperma and Acacia tetragonophylla and sometimes with Acacia ancistrocarpa.[2]

See also

References
  1. "Acacia subtessarogona". FloraBase. Western Australian Government Department of Parks and Wildlife.
  2. "Acacia subtessarogona". Flora of Australia Online. Department of the Environment and Heritage, Australian Government.
  • Mitchell, A. A.; Wilcox, D. G. (1994). Arid Shrubland Plants of Western Australia, Second and Enlarged Edition. University of Western Australia Press, Nedlands, Western Australia. ISBN 978-1-875560-22-6.
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