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. 2012 Dec 5;111(2):317–328. doi: 10.1093/aob/mcs261

Fig. 2.

Fig. 2.

Principal component analysis of five morphological traits from the Guadalquivir river basin, Strait of Gibraltar and Sebou river basin populations of Narcissus papyraceus. The first two axes account for 78 % and 18 % of the total variation, respectively. Monomorphic, anisoplethic and isoplethic populations are as indicated in the key. The Guadalquivir river basin and Strait of Gibraltar populations are depicted by black symbols, the Sebou river basin populations by grey symbols. Each population is represented with standard error of PCA1 and PCA2 factor loadings. Loadings for all the variables of the PCA are given in the top right corner. Arrows indicate populations from an intermediate geographic location between the Strait of Gibraltar and the Sebou river basin.