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FISH distribution pattern of 25S and 5S rDNA on metaphase chromosomes of Paphiopedilum section Barbata. (A) Paphiopedilum wardii, (B) P. hennisianum, (C) P. sukhakulii, (D) P. purpuratum, (E) P. dayanum, (F) P. venustum, (G) P. curtisii, (H) P. acmodontum, (I) P. sangii.
