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miami1071261639.pdf (2.63 MB)
ETD Abstract Container
Abstract Header
Biosystematics of the
Phacelia
ranunculacea
complex (Hydrophyllaceae)
Author Info
Matthew, Sewell
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=miami1071261639
Abstract Details
Year and Degree
2003, Master of Science, Miami University, Botany.
Abstract
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.
Committee
Michael Vincent (Advisor)
Pages
60 p.
Subject Headings
Biology, Botany
Keywords
Phacelia
;
Hydrophyllaceae
;
biosystematics
;
phenetic analysis
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RIS
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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)
Abstract Footer
Document number:
miami1071261639
Download Count:
1,480
Copyright Info
© 2003, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.