Phytogeographic distribution

Common phylogeny Morphologic-anatomical similarities Similar phytogeographic distribution Similar secondary metabolism... 

Some years ago, Breckon and Barbour (1974) published a review of beach vegetation for the North American Pacihc Coast that contains detailed information on a wide variety of strand taxa. A number of taxa discussed in their work have disjunct distributions, involving other continental beaches suggesting other taxa worthy of detailed phytogeographic study. 

The Brazilian Caatinga Phytogeographical Patterns Inferred from Distribution Data of the Leguminosae... 

Gentry, A., Distribution patterns of neotropical Bignoniaceae some phytogeographic implications, in Tropical Botany, Larsen, K. and Hohn-Nielsen, L., Eds, Academic Press, London, 1979, 339. 

Although knowledge of the flora of Chamela-Cuixmala is sufficiently advanced to permit an analysis of the patterns of geographical distribution, the full neotropical distributions of many of the species are still uncertain and therefore any analysis of the biogeographical patterns must be considered tentative. Nevertheless, we are reasonably confident that the phytogeographical affinities reported here will be sufficiently reliable not to be changed by future discoveries. 

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