Table 1.

Floral odour chemistry in the hybrid zone

Orchid taxa	Number of floral odour compounds identified (% of total)	Number of taxon-specific odour compounds identified
Ophrys arachnitiformis	64 (80%)	3
Hybrids	73 (91.25%)	2
Ophrys lupercalis	66 (82.5%)	1

Summary of floral odour compound production in each orchid taxon of the hybrid zone investigated. A total of 80 odour compounds have been identified, 48 (i.e. 60%) of which were produced by all three taxa simultaneously.