, Volume 70, Issue 4, pp 427–444 | Cite as

Notes on the Burseraceae in central Amazonia, including four new taxa. Studies in neotropical Burseraceae XXVI

  • Douglas C. Daly


The Burseraceae are known to comprise one of the most important tree families in Amazonia, but examination of Burseraceae diversity indicates that this importance is achieved differently in different parts of the Amazon, generally showing greater relative density compared to relative diversity in the east and greater relative diversity compared to relative density in the west, but both high relative density and diversity in central Amazonia. The patterns of relative density may be explained by current climates and by soils, but those of diversity are more likely a function of historical events. Revision of the Burseraceae for two projects near Manaus, Brazil revealed four new taxa. Protium hebetatum is widespread in western Amazonia, but it is one of the most common trees in central and west-central Amazonia; it resembles P. grandifolium. Protium tonyanum is a distinctive new species in poorly resolved sect. Sarcoprotium. Protium paniculatum var. modestum is known thus far only from the vicinity of Manaus plus several localities in the state of Amazonas, Venezuela; a key to the varieties is provided. Dacryodes hopkinsii is one of a group of four species in that genus from Amazonia and the Venezuelan Guayana with relatively large and fleshy flowers that are functionally bisexual. The discovery of these new taxa underscores the biological importance of Manaus and vicinity as a center of diversity for many taxa and exemplifies the synergy between well-designed floristic projects and systematics.


Biodiversity Dacryodes Manaus Neotropics Protium taxonomy 



I thank the late Rupert Barneby for his help with the selection of epithets, and Bobbi Angell for her revealing and handsome illustrations. I am particularly grateful to Michael J. Hopkins, José Eduardo Ribeiro, and their colleagues in the Projeto Flora da Reserva Ducke for supporting my field work at the reserve, for key re-collections from specific trees, for superb logistical support overall, and for the professionalism, patience and tenacity to bring their much-needed floristic project to fruition. Sue Laurance generously provided data from the Biological Dynamics of Forest Fragments Project in Manaus, and Elaine Hooper generously shared her insightful analyses of tree and seedling as a function of forest fragment size.

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© The New York Botanical Garden 2018

Authors and Affiliations

  1. 1.The New York Botanical GardenBronxUSA

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