Table 2.

Average length, cross-sectional area, and area of the vascular bundle in filaments of C. coelestis and C. dianthifolia

	C. coelestis					C. dianthifolia
Stamen type	Filament length (mm)	Filament cross-sectional area (mm2)	Vascular bundle area (mm2)	Filament length (mm)	Filament cross-sectional area (mm2)	Vascular bundle area (mm2)
Lateral	10·47 ± 0·31a	5·12 × 10−2 ± 6·11 × 10−3b	5·42 × 10−3 ± 3·52 × 10−4b	8·97 ± 0·27a	3·77 × 10−2 ± 2·17 × 10−3a	3·65 × 10−3 ± 1·91 × 10−4a
Central	8·68 ± 0·21b	1·17 × 10−1 ± 9·86 × 10−3a	6·31 × 10−3 ± 3·72 × 10−4a	7·17 ± 0·26b	4·35 × 10−2 ± 3·96 × 10−3a	3·91 × 10−3 ± 3·29 × 10−4a
Staminode	6·29 ± 0·15c	1·39 × 10−2 ± 1·10 × 10−3c	1·08 × 10−3 ± 5·70 × 10−5c	6·22 ± 0·28c	9·80 × 10−3 ± 5·87 × 10−4b	1·24 × 10−3 ± 6·90 × 10−5b

Values averaged across measurements of filaments of ten of each stamen type ± standard error for both species.

Different superscript letters within a column indicate significantly different values at P < 0·05.