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Table 1 The diploid chromosome numbers and rDNA FISH patterns of Paphiopedilum subgenera/sections

From: Taxonomic placement of Paphiopedilum rungsuriyanum (Cypripedioideae; Orchidaceae) based on morphological, cytological and molecular analyses

Subgenus/section 2n Number of rDNA sitesa
25S 5S
Subgenus Parvisepalum 26 2–4 2
Subgenus Brachypetalum 26 2 2
Subgenus Paphiopedilum    
 Section Laosianum 26 2 20
 Section Megastaminodium 26 2 22
 Section Paphiopedilum 26, 30 2 14–21
 Section Coryopedilum 26 2–9 16–32
 Section Pardalopetalum 26 2–6 8–34
 Section Barbata 32–42 2 2–18
 Section Cochlopetalum 30–38 2 20–25
  1. aThe rDNA FISH patterns at subgenus/section-level (except for sections Laosianum and Megastaminodium) published by Lan and Albert (2011)