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A New Lightweight-Wooded Species of Anaxagorea (Annonaceae) from Flooded Black-Water Shrublands in Southern Venezuela

Paul E. Berry, Regis B. Miller and Alex C. Wiedenhoeft
Systematic Botany
Vol. 24, No. 4 (Oct. - Dec., 1999), pp. 506-511
DOI: 10.2307/2419639
Stable URL: http://www.jstor.org/stable/2419639
Page Count: 6
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A New Lightweight-Wooded Species of Anaxagorea (Annonaceae) from Flooded Black-Water Shrublands in Southern Venezuela
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Abstract

Anaxagorea inundata P. E. Berry & R. B. Miller is a distinctive new species from the blackwater Rio Atabapo basin in southern Venezuela. It is adapted to its strongly flooded habitat by producing very lightweight wood (specific gravity <0.2) and just a few leaves and flowers near the tips of the unbranched or few-branched stems. It appears to be most closely related to A. rheophytica Maas & Westra, also from a black-water river in southern Venezuela. An illustration of morphological features and photomicrographs of the wood anatomy are provided.

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