Topic
Pearcea
About: Pearcea is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 139 citations.
Papers
1 Jan 1996
TL;DR: Pearcea differs from related and similar genera in the Gloxinieae by having fleshy capsules dehiscing by two valves and exposing a sticky seed mass, and is usually found in the shady, humid forest understory, often near small streams.
Abstract: Kvist, Lars Peter, and Laurence E. Skog. Revision of Pearcea (Gesneriaceae). Smithsonian Contributions to Botany, number 84,47 pages, 22 figures, 1 table, 1996.-Seventeen species of Pearcea (Gesneriaceae) are recognized, nine of which are new: Pearcea bella, P. bilabiata, P. cordata, P. fuscicalyx, P. glabrata, P. gracilis, P. grandijolia, P. intermedia, and P. strigosa. Of the remaining eight species, two were originally described in Pearcea, one is transferred herein from Kohleria, and five come from Parakohleria, a genus placed in synonymy herein. Pearcea occurs mainly on the eastern Andean slopes of Colombia (5 species), Ecuador (12 species), Peru (6 species), and Bolivia (1 species), and one species also occurs on the western Andean slopes in Ecuador. The largest number of species appears to occur in Ecuador, although additional species may occur in less explored parts of Peru. Pearcea differs from related and similar genera in the Gloxinieae by having fleshy capsules dehiscing by two valves and exposing a sticky seed mass. All species are herbs, usually with bright red flowers, and are usually found in the shady, humid forest understory, often near small streams. Hybridization, local speciation, and polymorphic variation may complicate the species delimitation. The variable Pearcea sprucei occurs throughout nearly the entire range of the genus (and includes the only accepted variety, var. parvzji’ora), but most species are rare and local. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution’s annual report, Smithsonian Year. SERIES COVER DESIGN: Leaf clearing from the katsura tree Cercidiphyllum japonicum Siebold and Zuccarini. Library of Congress Cataloging-in-Publication Data Kvist, Lars Peter. Revision of Pearcea (Gesneriaceae) / Lars Peter Kvist and Laurence E. Skog. p. crn. (Srnithsonian contributions to botany ; no. 84) Includes bibliographical references (p. 46) and index. 1. Pearcea-Classification. 1. Skog, Laurence E. 11. Title. 111. Series. QKl.S2747 no. 84 [QK495.G4] 581 s-dc20 [583’.81] 96-28456 @ The paper used in this publication meets the minimum requirements of the American National Standard for Permanence of Paper for Printed Library Materials 239-48-1984.
89 citations
TL;DR: Maximum parsimony phylogenetic analyses suggest that the genera Gloxinia, Phinaea, and (possibly) Diastema are polyphyletic; Kohleria is paraphyletic in relation to Capanea; Bellonia and Pheidonocarpa should be considered members of tribe Gesnerieae; and Lembocarpus is a member of tribe Episcieae.
Abstract: Tribe Gloxinieae has been estimated to include 22 genera and approximately 290 species. This study presents maximum parsimony phylogenetic analyses of nuclear ribosomal DNA internal transcribed spacer regions sequences, the chloroplast DNA trnL intron and trnL-trnF intergenic spacer region sequences, a morphological cladistic dataset, and combined analyses of these datasets. These analyses suggest that the genera Gloxinia, Phinaea, and (possibly) Diastema are polyphyletic; Kohleria is paraphyletic in relation to Capanea; Bellonia and Pheidonocarpa should be considered members of tribe Gesnerieae; and Lembocarpus is a member of tribe Episcieae. Furthermore, the historically recognized genus Seemannia, now included in Gloxinia, appears to form a strongly supported monophyletic group; several Gloxinia species from southern Brazil appear to be most closely related to Goyazia; Capanea, Kohleria, Pearcea s.l., and Diastema vexans appear to form a strongly supported clade; and Diastema, Monopyle, Phinaea (in part), and a few Gloxinia species (Gloxinia dodsonii, G. lindeniana, and G racemosa) form a clade. Classification issues and generic boundaries of these lineages are discussed in detail.
48 citations
TL;DR: Results from molecular data generated from the nrDNA ITS and cpDNA trnL-F regions strongly support that P. pulchella does not group with other Phinaea species and instead shares a recent common ancestor with Diastema vexans in a clade that is sister to Pearcea and Kohleria, suggesting that radial floral symmetry and buzz-pollination is autapomorphic in this taxon.
Abstract: Phinaea , in the currently accepted circumscription, is a genus in the flowering plant family Gesneriaceae with three widely dis- junct species. These species are known from small populations in Mexico, northern South America, and the West Indies (Cuba and Haiti), respectively. Phinaea pulchella is one of the few members of the tribe Gloxinieae that occurs naturally in the West Indies and it is the only mem- ber of the tribe endemic to that region. It was rediscovered in Cuba in 2008, more than fifty years after it was last documented. Results from molecular data generated from the nrDNA ITS and cpDNA trnL-F regions strongly support that P. pulchella does not group with other Phinaea species and instead shares a recent common ancestor with Diastema vexans in a clade that is sister to Pearcea and Kohleria . The phylogenetic placement of P. pulchella suggests that radial floral symmetry and buzz-pollination is autapmorphic in this taxon. Our results strongly support convergence of radial symmetry and associated characters with buzz-pollination in the following taxa in the tribe Gloxinieae: Niphaea , Phinaea s. s., Phinaea pulchella , and Amalophyllon . New generic circumscriptions based on the results presented here are not suggested until more com- plete taxon sampling includes additional species currently recognized in Amalophyllon .
11 citations
TL;DR: A new species of Gesneriaceae (tribe Gloxinieae) is described from Ecuador and Peru in South America, and Observations of the bivalved fruit dehiscence and the resulting appearance of winged appendages in P. pileifolia and other congeners are discussed.
Abstract: A new species of Gesneriaceae (tribe Gloxinieae) is described from Ecuador and Peru in South America. Pearcea pileifolia J. L. Clark & L. E. Skog is vegetatively distinctive from all other species of Pearcea Regel by its oblong leaf blades with crenate to serrate margins and markedly anisophyllous, opposite leaves with the smaller leaf in a pair reduced to a scalelike appendage. Observations of the bivalved fruit dehiscence and the resulting appearance of winged appendages in P. pileifolia and other congeners are discussed.
2 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2011 | 1 |
| 2009 | 1 |
| 2005 | 1 |
| 1996 | 1 |