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6 535441 Hoodia alstonii (N.E. Br.) Plowes [125 1027674 Trichocaulon alstonii N.E. Br.]
I.B. Pole-Evans, E.P. Phillips, R.A. Dyer, L.E. Codd, Fl. Pl. S. Afr., vol. 47 : t. 1846 (1982) [Holcroft]
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