Bruguiera (Rhizophoraceae) in the Indo-West Pacific: a morphometric assessment of hybridization within single-flowered taxa

Duke, N.C., and Ge, X.-J. (2011) Bruguiera (Rhizophoraceae) in the Indo-West Pacific: a morphometric assessment of hybridization within single-flowered taxa. Blumea, 56 (1). pp. 36-48.

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Abstract

The first putative hybrid tree species of the genus Bruguiera (Rhizophoraceae), B. x rhynchopetala, is reported from mangrove forests of China and Australia. It was described from China previously as a variety of B. sexangula. The hybrid is acknowledged as B. gymnorhiza x B. sexangula with parent species restricted to different parts of the Indo-West Pacific. The hybrid is recognised at north-eastern and south-eastern parts of the overlap area between parent distributions, but it appears absent in western parts. Further local assessments are needed across the range. Hybrid status is supported by: 1) intermediate and shared morphological characters; 2) distribution limited to areas of co-occurrence of B. gymnorhiza and B. sexangula; and 3) molecular studies. However, compared with other mangrove genera with naturally occurring hybrids, this occurrence is unusual since this intermediate usually has functional flowers and fruits. Full descriptions are given for the new hybrid taxon and three larger, single-flowered Bruguiera taxa, along with distribution maps and a key.

Item ID: 30003
Item Type: Article (Research - C1)
ISSN: 2212-1676
Keywords: Bruguiera x rhynchopetala, hybrid, Indo-West Pacific, mangrove, morphometric, Rhizophoraceae
Additional Information:

This is an open access article published under a CC_BY-NC-ND 3.0 license.

Funders: University of Hong Kong, US Forest Service, Australian Institute of Marine Science (AIMS)
Date Deposited: 30 Oct 2013 09:41
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 40%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060310 Plant Systematics and Taxonomy @ 40%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 20%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960802 Coastal and Estuarine Flora, Fauna and Biodiversity @ 40%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 40%
96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960609 Sustainability Indicators @ 20%
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