The umbrella thorn, (Vachellia planifrons), is a species of Vachellia of the family Fabaceae. It is native to India and Sri Lanka. It is about 7m high thorny shrub. Greyish-brown bark is thick with horizontal markings. Leaves are bipinnate, alternate; apex obtuse; margin entire. Flowers are white in color. Fruit is a pod.
Taxonomy Vachellia planifrons was scientifically described in 1834 by Robert Wight and George Arnott Walker Arnott and named Acacia planifrons. Prior to its first valid description Mimosa eburnea was described in 1805, but this name had already been used in 1782. In 2014 it was moved to Vachellia by Subramanyam Ragupathy, David Stanley Seigler, John Edwin Ebinger, and Bruce Maslin. It has no accepted subspecies and six synonyms.
Table of Synonyms Name Year Rank Notes Acacia planifrons 1834 species ≡ hom. Acacia roxburghii 1834 species = het. Mimosa caesia 1831 species = het., not validly publ. Mimosa eburnea 1805 species = het., sensu auct. Mimosa planifrons 1834 species = het. Mimosa umbrifera 1834 species = het. Notes: ≡ homotypic synonym; = heterotypic synonym
References
External links GROWTH RESPONSE OF ACACIA PLANIFRONS