ANATOMY AND THE TAXONOMIC SIGNIFICANCE OF GROSS VEGETATIVE MORPHOLOGY IN SENECIO

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Summary

The well-known arrangements of Senecio species appear to be based on inadequate data. Observations on leaf hairs, achene hairs, corolla venation, pappus structure and ovarian crystal form are presented for forty-five species. A classification based on these features bears little resemblance to the conventional view of the genus, but its taxonomic soundness is strikingly supported by considerations of gross leaf morphology and habit.

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