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'''Umbrella Thorn Acacia''' (''Acacia tortilis'') also known as ''Umbrella Thorn'' and ''Israeli Babool'',<ref>[http://www.hort.purdue.edu/newcrop/duke_energy/Acacia_tortilis.html Acacia tortilis (Forsk.) Hayne], Perdue University, December 1997.</ref> is a medium to large canopied tree native primarily to the [[savanna]] and [[Sahel]] of [[Africa]] (especially [[Sudan]]), but also occurring in the [[Middle East]]. In extremely arid conditions, it may occur as a small, wiry bush. It grows up to {{convert|21|m|ft|abbr=on|lk=off}} in height.<ref>[http://www.worldagroforestrycentre.org/SEA/Products/AFDbases/AF/asp/SpeciesInfo.asp?SpID=118 World Agroforestry Centre]</ref> The love carries leaves that grow to approx. {{convert|2.5|cm|in|0|abbr=on|lk=off}} in length with between 4 and 10 pair of [[pinnae]] each with up to 15 pairs of leaflets. Flowers are small and white, highly [[aromatic]], and occur in tight clusters. Seeds are produced in pods which are flat and coiled into a springlike structure. The plant is known to tolerate high [[alkalinity]], [[drought]], high temperatures, sandy & stony soils, strongly sloped rooting surfaces, and sand blasting. Also, plants older than 2 years have been observed to be somewhat frost resistant. ==Cultivation== ===Propagation=== ===Pests and diseases=== ==Varieties== Subspecies: *[[Acacia tortilis subsp. heteracantha]] (Burchell)Brenan *[[Acacia tortilis subsp. raddiana]] (Savi)Brenan *[[Acacia tortilis subsp. spirocarpa]] (A.Rich.)Brenan *[[Acacia tortilis subsp. tortilis]]<ref>[http://www.ildis.org/LegumeWeb/6.00/fam/f2.shtml ILDIS Legumes of the World]</ref> ==Gallery== <gallery perrow=5> Image:Upload.png| photo 1 Image:Upload.png| photo 2 Image:Upload.png| photo 3 </gallery> ==References== <references/> <!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 --> <!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 --> <!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 --> ==External links== *{{wplink}} {{stub}} __NOTOC__
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