Aloe xanthacantha
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Aloe xanthacantha Willd. [Synonym] = Aloe perfoliata L. (Liliaceae)
Engish:

protologue: Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 5: 282 (1811) [url checked 20190321]