Xerox University Microfilms 300 North Zeab Road Ann Arbor, Michigan 40106 7 7 *2 3 6 3 CANNE, Judith Marie, 1943
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Xerox University Microfilms 300 North Zeab Road Ann Arbor, Michigan 40106 7 7 *2 3 6 3 CANNE, Judith Marie, 1943. THE SYSTEMATICS OF THE GENUS GALINSOGA CCOMPOSITAE: HELIANTHEAE). The Ohio State University, Ph.D., 1976 Botany Xerox University Microfilms , Ann Arbor, Michigan 48106 © 1976 JUDITH MARIE CANNE ALL RIGHTS RESERVED THE SYSTEMATICS OF THE GENUS GAL INSOGA (COMPOSITAE: HELIANTHEAE) DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Judith Marie Canne, B.S., M.Sc. ***** The Ohio State University 1976 Reading Committee: Approved By Dr. Valayamghat Raghavan Dr. Ronald L. Stuckey Dr. Tod F. Stuessy Advisee Dr. Thomas N. Taylor Department o ACKNOWLEDGMENTS Many people have offered assistance during this study and I extend to them sincere appreciation* particularly to Dr. Tod F. Stuessy who suggested the project and provided guidance throughout the study. Appreciation is owed to: Dr. David Keil for his help with nomenclature and field work in Mexico, Dr. Roland Seymour who made the trip to Guatemala possible, Dr. Donald Simpson for his help in planning the field work in Peru, Dr. Ramon Ferreyra for his assistance in Peru and for providing duplicates of some Galinsoga collections, Ms. Kathleen Hruschak and Sr. Josd Schunke for th eir help on field trip s, Dr. Elton Paddock for help in interpreting certain meiotic preparations, Mr. Robert Gardner and Dr. Robert Haynes for their help and suggestions, and Dr. Ronald L. Stuckey for aid with certain nomenclatural problems. Several people have provided assistance with lite ra tu re, and thanks are extended to Ms. Phyllis Edwards, Botany librarian at the British Museum (Natural History); Dr. L. Niklas, librarian at Botanisches Institu t und Botanischer Garten der Universitat Wien, Austria; to Dr. Karl Otto Meyer for information regarding the Roth herbarium; to Dr. Herv§ M. Burdet for data about the protologue of Galinsoga brachystephana; and to the late J.E. Lousley for help in locating the original publication of the name Galinsoga hirsuta. Thanks are also due Mrs. Carol Stuessy for preparing the illustrations of capitula of new species, and Dr. Charles Heiser for collecting fruits of Galinsoga while in Ecuador. Field work in Mexico, Peru, and the United States was supported by National Science Foundation Grant GB30240. Appreciation is offered to the curators and directors of the following herbaria for loan of specimens (abbreviations after Holmgren and Keuken, 1974); A, ARIZ, BM, CAS, DAV, DS, DUKE, ENCB, F, FSU, GH, K, LD, LL, MA, MEXU, MICH, MO, MSC, NY, OAC, OS, P, TEX, UC, US, USM, WIS, Z, and ZT. VITA Nov. 27, 1943 ................. Born - Syracuse, New York 1965 .................................. B.S., State University College of New York at Geneseo 1965-1969 ....... Senior High School Biology teacher, Victor, New York 1969-1970 ......................... National Science Foundation Academic Year Institute participant, Ball State University, Muncie, Indiana Aug., 1970 ..................... M.Sc., Ball State University, Muncie, Indiana 1970-1973 ......................... Graduate teaching associate, Department of Botany, The Ohio State University, Columbus, Ohio 1973-1974 ......................... Instructor of Biology, The Pontificial College Josephinum, Worthington, Ohio 1974-1975 ......................... Graduate teaching associate, Department of Botany, The Ohio State University, Columbus, Ohio 1975-1976 ......................... Lecturer, The Department of Botany and Genetics, The University of Guelph, Guelph, Ontario, Canada PUBLICATIONS "Compositae: Heliantheae, Galinsoginae of Panama. In Woodson et a l. Flora of Panama. Ann. Missouri Bot. Card. 1976. FIELDS OF STUDY Major Field: Systematic Botany Studies in intergeneric relationships of the subtribe Galinsoginae (Compositae). Associate Professor Tod F. Stuessy Studies in the systematics of the genus Galinsoga (Compositae). Associate Professor Tod F. Stuessy iv TABLE OF CONTENTS Page ACKNOWLEDGMENTS ................................................................................................ ii VITA .................................................................................................................... iv LIST OF TABLES................................................................................................ vii LIST OF FIGURES ............................................................................................ v iii CHAPTER I. A REVISION OF THE GENUS GALINSOGA (COMPOSITAE: HELIANTHEAE) Introduction ............................................................................... 1 Taxonomic History ................................................................... 3 Distribution and O rig in ...................................................... 7 Morphology................................................................................... 11 Cytology........................................................................................ 14 Phylogeny................................................................................... 21 Taxonomic Concepts ................................................................... 24 Taxonomy........................................................................................ 25 Key to Species ........................................................................... 28 Galinsoga Section Elata Canne .......................................... 30 Galinsoga formosa Canne .............................................. 31 Galinsoga elata Canne .................................................. 32 Galinsoga durangensis (Longpre) Canne ................. 36 Galinsoga mol1is McVaugh .......................................... 39 v Galinsoga Section Stenocarpha Canne ...................................... 41 Galinsoga f i l i f ormis Hemsl .............................................. 41 Galinsoga Section Galinsoga ...................................................... 45 Galinsoga longipes Canne .......................................... 45 Galinsoga tr ir a diata Canne...................................... 48 Galinsoga caliqensis Canne ............................. 51 Galinsoga guadriradiata Ruiz & Pavon................. Galinsoga boliviensis Canne ................................. 75 Galinsoga subdiscoidea Cronquist ......................... 79 Galinsoga mandonii Sch.-Bip ...................................... 82 Galinsoga parviflora C a v .......................................... 8 8 Galinsoga glandulosa Canne ...................................... 103 Excluded Names ............................................................................... 105 Literature Cited ........................................................................... 109 I I . THE CIRCUMSCRIPTION AND GENERIC RELATIONSHIPS OF GALINSOGA (COMPOSITAE: HELIANTHEAE) Introduction ................................................................................... 119 History of the Generic Concept of Galinsoga s. str. 120 Relationship to Tricarpha ................................................. 121 Relationship to Stenocarpha ............................................. 124 Relationship to Sabazia ...................................................... 125 Relationship to Selloa ..................................................... 130 Relationship to Tridax ..................................................... 131 Relationship to Cymophora ................................................. 133 Relationship to Calea .......................................................... 134 Summary...............................................................................................