Acacia xiphophylla
Acacia xiphophylla
Safety & Hazards
The seed of many Acacia species, including this one, is edible and highly nutritious, and can be eaten safely as a fairly major part of the diet. Not all species are edible, however, and some can contain moderate levels of toxins[1]. Especially when harvesting from the wild, especial care should be taken to ensure correct identification of any plants harvested for food[PFAF]. Especially in times of drought, many Acacia species can concentrate high levels of the toxin Hydrogen cyanide in their foliage, making them dangerous for herbivores to eat.
Cultivation Details
Acacia xiphophylla is a plant of the warm to hot arid zones of subtropical to tropical western Australia, where it is found at elevations up to 1,000 metres. It grows best in areas where annual daytime temperatures are within the range 24 - 36°c, but can tolerate 12 - 45°c[2]. When dormant, the plant can survive temperatures down to about -3°c, but young growth is more tender and can be severely damaged at 0°c[2]. It prefers a mean annual rainfall in the range 200 - 250mm, but tolerates 150 - 300mm and can withstand a dry season of 8 - 10 months[2]. Requires a sunny position. Grows in the wild on well-drained, medium to heavy textured soils that can be of moderate to low fertility[2]. Tolerates moderate levels of salt in the soil[2]. Prefers a pH in the range 7 - 8, tolerating 6.5 - 8.5[2]. A slow-growing, long-lived plant that regenerates from seed and apparently does not produce root suckers[3]. The plant has moderate coppicing ability when cut or damaged (e.g. by cool fire) at ground level; it will also reshoot from the terminal branches following cool fires. The plants are readily killed by hot, or even moderately hot, fires[3]. The seeds of most acacia species can be quickly and efficiently harvested at full maturity without the need for any specialised equipment. Small seed-bearing branches can be cut and beaten on sheets, or bushes can be beaten or shaken directly onto large sheets[4]. This species has a symbiotic relationship with certain soil bacteria; these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[5].
Propagation
The seed of most members of this genus has a hard seedcoat and may benefit from scarification before sowing to speed up germination. The seeds of this species, however, are soft-coated and therefore may not require any treatment prior to sowing[3]. If required, scarification can usually be done by pouring a small amount of nearly boiling water on the seeds (being careful not to cook them!) and then soaking them for 12 - 24 hours in warm water. By this time they should have imbibed moisture and swollen - if they have not, then carefully make a nick in the seedcoat (being careful not to damage the embryo) and soak for a further 12 hours before sowing. Acacia seeds that have matured fully on the bush and have been properly dried have a hard seed coat and can be stored in closed containers without deterioration for 5 - 10 years or more in dry conditions at ambient temperatures. It is best to remove the aril, which attracts weevils and can lead to moulds forming. The arils are easilyremoved by placing the seeds in water and rubbing them between the hands, then drying the seeds and winnowing them[4]. Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2026-02-19. <tropical.theferns.info/viewtropical.php?id=Acacia+xiphophylla>
Pollinators
Insects
References
- [1]Acacia in Australia: Ethnobotany and Potential Food Crop — Lister P.R.; Holford P.; Haigh T.; Morrison D.A. · ASHS Press, Alexandria, VA. · 1996 · https://hort.purdue.edu/newcrop/proceedings1996/v3-toc.html · ISBN 0-9615027-3-8 ↩︎
- [2]Ecocrop — http://ecocrop.fao.org/ecocrop/srv/en/home ↩︎Basic information on a wide range of useful plants, plus details of environmental needs where available.
- [3]Wattles of the Pilbara — http://worldwidewattle.com/speciesgallery/descriptions/pilbara/html/default.htm ↩︎A website with factsheets for the various Acacia species that grow in the Pilbara region of northwestern Western Australia
- [4]Potential of Australian Acacias in combating hunger in semi-arid lands — Rinaudo A.; Patel P.; Thomson L.A.J. · 2002 ↩︎
- [5]Nodulation Plants in GRIN Taxonomy — United States Department of Agriculture · http://www.ars-grin.gov/~sbmljw/cgi-bin/taxnodul.pl?language=en ↩︎An online database listing plants that have either positive or negative reports on root and stem nodulation with nitrogen-fixing bacteria.
- [6]Flora of Australia — http://www.anbg.gov.au/abrs/abif/flora/ ↩︎The full information from the Flora of Australia - on-line. An excellent resource.
- [7]Australian Trees and Shrubs: Species for Land Rehabilitation and Farm Planting in the Tropics — Doran J.C.; Turnbull J.W. (Editors) · Australian Centre for International Agricultural Research; Canbe · 1997 · ISBN 1-86320-127-0 ↩︎A very informative book, rich in information about the uses, cultivation needs and very much more for over 160 species of Australian trees and shrubs.
- [8]The Useful Native Plants of Australia. — Maiden J.H. · Turner & Co.; London. · 1889 · http://www.biodiversitylibrary.org ↩︎Terse details of the uses of many Australian plants and other species naturalised, or at least growing, in Australia. It can be downloaded from the Internet.
- [PFAF]Plants for a Future — pfaf.org ↩︎