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Cell numbers (A) and anisotropy (B) of long- (grey) and short-spurred (white) flowers under unit size. L-1, top of long spur; L-2, bottom of long spur; S-1, top of short spur; S-2, bottom of short spur. Sample sizes are 65, 132, 70, and 63 in the S-1, S-2, L-1, and L-2, respectively.
