289 pages, 57 plates with b/w photos and b/w illustrations
The last survey of Begoniaceae to include all known species was that of A. DeCandolle in his Prodromus in 1862. It had brief descriptions of 380 species, organized into American, Asian, and African groups of sections. The arrangement was taxonomic and many descriptions of species lacked the necessary floral or fruit characters to place them in sections.
Since 1864 over 1000 species have been proposed, many without any relation to previous ones. Begoniaceae, first edition (1986) provided an illustrated key to all natural species, separating the American species from those of the Old World. This key was meant primarily for identification and thus was based on blade-shape, habit, and inflorescence.
This new edition of Begoniaceae has been completely revised to include the many new taxa and the changes in status that have occurred since 1986. The Illustrated Key, now Part II, with the errata for Edition 1, has been abridged and supplemented to include the new changes.
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