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Biosystematics of the Phacelia ranunculacea complex (Hydrophyllaceae)

Matthew, Sewell

Abstract Details

2003, Master of Science, Miami University, Botany.
Phacelia ranunculacea sensu lato (subgenus Cosmanthus , Hydrophyllaceae) occurs on floodplains and in alluvial hardwood forests throughout eastern North America. It is comprised of herbaceous annuals with alternate, pinnate leaves and white to lavender, tubular-campanulate flowers in terminal scorpioid-like cymes. The distribution of populations displays a disjunct between the Midwest and Atlantic coastal plain, with a chromosome number of n =6 associated with the former and n =14 allied with the latter. A phenetic analysis of morphological characters was conducted using 350 herbarium specimens from 18 herbaria. The resulting phenogram revealed two distinct clusters of specimens on which haploid chromosome number was mapped. Correlation of clusters and chromosome counts with type specimens resulted in recognition of two taxa: Phacelia ranunculacea sensu stricto and Phacelia covillei . Results of morphological analyses, a diagnostic key, species descriptions, and lists of representative specimens are provided for these two closely related species.
Michael Vincent (Advisor)
60 p.

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Citations

  • Matthew, S. (2003). Biosystematics of the Phacelia ranunculacea complex (Hydrophyllaceae) [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1071261639

    APA Style (7th edition)

  • Matthew, Sewell. Biosystematics of the Phacelia ranunculacea complex (Hydrophyllaceae). 2003. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1071261639.

    MLA Style (8th edition)

  • Matthew, Sewell. "Biosystematics of the Phacelia ranunculacea complex (Hydrophyllaceae)." Master's thesis, Miami University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1071261639

    Chicago Manual of Style (17th edition)