Table 3.

Correlation coefficients between the four metric parameters recorded within each inflorescence

	Labellum length	Labellum width	Spur length
(A) Dactylorhiza praetermissa (n = 35)
Labellum width	0·773
Spur length	–0·125	–0·067
Spur width	0·187	0·323	0·127
(B) Dactylorhiza cf. foliosa × praetermissa (n = 61)
Labellum width	0·885
Spur length	0·042	0·140
Spur width	0·330	0·353	0·445
(C) Dactylorhiza fuchsii (n = 30)
Labellum width	0·890
Spur length	0·270	0·371
Spur width	0·025	0·243	0·438
(D) Gymnadenia conopsea (small) (n = 9)
Labellum width	0·870
Spur length	0·186	0·176
Spur width	0·930	0·909	0·127
(E) Gymnadenia conopsea (medium) (n = 15)
Labellum width	0·918
Spur length	0·630	0·454
Spur width	0·454	0·490	–0·302
(F) Anacamptis pyramidalis (n = 35)
Labellum width	0·964
Spur length	0·870	0·887
Spur width	0·670	0·742	0·607
(G) Platanthera chlorantha (n = 9)
Labellum width	0·887
Spur length	0·380	0·252
Spur width	0·707	0·720	0·822

The correlation coefficient for labellum length versus width for Dactylorhiza viridis is 0·960 (n = 16).