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''Aloe'' comprises about 450 species in Africa and Arabia, of which c. 315 occur in mainland Africa, c. 100 are endemic to Madagascar or the Indian Ocean islands (including the former ''Lomatophyllum'') and c. 50 occur in Arabia. The taxonomy is complicated by the occurrence of interspecific hybrids both in the wild and in cultivation. Two varieties of ''Aloe secundiflora'' are recognized: var. ''secundiflora'' and the suckering var. ''sobolifera'' S.Carter; the latter is only known from Tanzania. Natural hybrids with several other species have been reported. Apart from ''Aloe secundiflora'', there are several other East African species with similar growth habit and with medicinal use or use as poison.  === ''Aloe macrosiphon'' ===''[[Aloe macrosiphon]]'' Baker is used medicinally and has very similar chemical properties to ''Aloe vera''.  === ''Aloe ruspoliana'' ===''[[Aloe ruspoliana]]'' Baker is poisonous to sheep and camels and is used in Somalia and Kenya to poison hyenas.

Newton, L.E., 2006. '''Aloe secundiflora''' Engl. [Internet] Record from PROTA4U. In: Schmelzer, G.H. & Gurib-Fakim, A. (Editors). PROTA (Plant Resources of Tropical Africa / Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. <http://www.prota4u.org/search.asp>. Accessed {{CURRENTDAY}} {{CURRENTMONTHNAME}} {{CURRENTYEAR}}.

[[Category:PROTA prov]]