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THE AMERICAN ERYCIBEAE (CONVOLVULACEAE): MARIPA, DICRANOSTYLES, AND LYSIOSTYLES I. SYSTEMATICS1 DANIEL F. AUSTIN2 ABSTRACT Studies of morphology, anatomy, ecology, phenology, cytology, palynology, phytogeog-raphy, and an analysis of related genera fonn the basis of a major tribal re-arrangement in the Convolvulaceae, and a systematic study of the American members of the tribe Erycibeae. Detailed results of the palynological and anatomical studies will be reported later. Field studies in Peru, Venezuela, Guyana, and Brazil, along with greenhouse grown plants from Brazil and Panama have aided in the understanding of some of the biological relationships of the taxa. Specimens, including types, from 23 major North and South American, and European herbaria have been utilized in this study, which has led to the recognition of eleven new taxa: one new subgenus, two new sections, three new subsections, five new species, two new varieties, and two new combinations. Keys, descriptions, typification, synonymy, and specimen citation are included for each taxon. The concept of the tribe Erycibeae has changed drastically since first con-ceived by Endlicher (1841) for the single genus Erycibe. Early workers con-sidered the southeastern Asian genus Erycibe distinct from the Convolbulaceae, and some thought it best allied with the Boraginaceae (Choisy, 1833). Hallier (1893) was the first to place the southeastern Asian genus Erycibe, the American genus Maripa, and the Malagasy genus Humbertia in the tribe Erycibeae. Al-though Bentham (1846) had recognized earlier the alliance between Maripa, Dicranostyles, and Lysiostyles, Meisner (1869), Peter (1891), Hallier (1893), Ooststroom (1953) and others did not. Most taxonomic studies of the Con-volvulaceae since Hallier have either followed his suggestions or have separated the genus Humbertia from the tribe (Pinchon, 1945, 1951). Only in 1964 were the concepts of the Erycibeae and the related Dicrano-styleae, both sensu Hallier, seriously questioned (Roberty, 1964). Although Roberty realized that the genera Dicranostyles and Lysiostyles, which had for-merly been placed in the Dicranostyleae (Meisner, 1869; Hallier, 1893), were related to Maripa and Erycibe, the general superficiality of his study led most readers to disregard his publication. There has been remarkably little study of these interesting genera since theywere first described. There have been two partial revisions of the genus Maripa(Gleason, 1929; Falcio, 1947), but neither was very thorough. Macbride (1959) 1Based on a dissertation submitted to the Graduate School of Washington University inpartial fulfillment of the requirements for the degree of Doctor of Philosophy. Assisted byNational Science Foundation Grant GB-5042, Air Force Office of Scientific Research ContractF44620-67-C-0055 (Walter H. Lewis principal investigator of both), the Governor AlacidNunes Fellowship awarded by the Partners of the Alliance Pari/Missouri, a Grant-in-Aid ofResearch from the Society of the Sigma Xi, and field trip funds supplied by the Museu Goeldiin Bel�m, Brazil. Numerous people assisted in various ways and their help is gratefullyacknowledged. Curators of the herbaria kindly permitted loans of their specimens for thisstudy, and their help is acknowledged. Publication partially supported by a grant from theDivision of Sponsored Research, Florida Atlantic University. 2 Herbarium, Department of Biological Sciences, Florida Atlantic University, Boca Raton,Florida 33432.ANN. MissouRI BOT. GARD. 60: 306-412. 1973.

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The American Erycibeae (Convolvulaceae): Maripa, Dicranostyles, and Lysiostyles I. Systematics

Daniel F Austin
Annals of the Missouri Botanical Garden 60: 306-412 (1973)

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