期刊
SYSTEMATIC BOTANY
卷 36, 期 4, 页码 939-949出版社
AMER SOC PLANT TAXONOMISTS
DOI: 10.1600/036364411X604958
关键词
Amazonia; rain forest trees; South America; speciation; white-sand forests
资金
- National Science Foundation [DEB-0918600, OISE-0402061]
- Direct For Biological Sciences
- Division Of Environmental Biology [0919567] Funding Source: National Science Foundation
Protium section Papilloprotium and Protium alvarezianum are described and a key to the four species of the section provided. The section is distinguished principally by its papillate abaxial leaflet surface, and the petals saccate at base and villous adaxially. The rather widespread edaphic generalist P. ferrugineum shares a common ancestor with two small clades, one containing two white-sand specialists (P. reticulatum and P. alvarezianum) that appear to have diverged from a common ancestor allopatrically via fragmentation of white-sand habitats, and the other exhibiting degrees of edaphic specialization among variants of P. subserratum. This scenario highlights the role of edaphic heterogeneity as a driver in the diversification of the Amazon flora.
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