| Abstract Detail
Systematics Horn, Charles [1]. A new hybrid of Asimina (Annonaceae) in the southeastern USA. Two species of the genus Asimina (Annonaceae), A. triloba and A. parviflora, are well known and common in the southeastern United States. Field and laboratory work investigating morphological variation in leaf and flower morphology as well as habitat of the genus in South Carolina has shown that a hybrid between the two species exists. The differences in the three taxa are best related to growth form, habitat, peduncle length, and outer petal length and width. The hybrid has a longer peduncle, and larger outer petal length than A. parviflora while the hybrid peduncle length and outer petal width are less than on A. triloba. Relative to habitat, the hybrid is commonly found as clones at the base of slopes above floodplains with individual stems about 1.5 meters tall. In comparison A. parviflora commonly grows as small individual stems near ridge tops and A. triloba is a large clonal tree on the floodplain proper. This new hybrid, Asimina × piedmontana, has been documented in the piedmont of South Carolina (6 populations) and North Carolina (1 population), but is likely to be present where distribution of the two parent species overlap in North Carolina, South Carolina, Georgia, Alabama, Mississippi and Louisiana.
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1 - Newberry College, Biology, 2100 College Street, Newberry, SC, 29108, USA
Keywords:
Asimina
pawpaw
Annonaceae
Hybrids.
Presentation Type: Oral Paper
Session: 20, Basal Dicots/Monocots part A (Asparagales)
Location: 200/Savannah International Trade and Convention Center
Date: Tuesday, August 2nd, 2016
Time: 8:00 AM
Number: 20001
Abstract ID:818
Candidate for Awards:None |
