LABIATAE: TAXONOMY AND SUSCEPTIBILITY TO PUCCINIA MENTHAE PERS.

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Summary

Correlations among comparative observations on pollen grains, stomata and stem anatomy tor 125 genera of Labiatae suggest that the family comprises two main groups. This situation was hinted at by Bentham, but is completely obscured by the currently fashionable classification of Briquet. The rust fungus Puccinia menthae Pers. exhibits a very marked preference for members of one group (seventy recorded host species) over the other (only one host species).

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