The legume subfamily Caesalpinioideae is a paraphyletic grade, within which are nested the monophyletic subfamilies Mimosoideae and Papilionoideae. Although higher level relationships within ...Caesalpinioideae are now better understood, few studies have examined generic and species level relationships. A morphological and molecular phylogenetic analysis of selected members of the Brownea clade (Detarieae: Caesalpinioideae) is presented here, focusing on relationships within and among the genera Elizabetha, Heterostemon, Paloveopsis, and Paloue. Morphological characters (125) and DNA sequence data from the plastid trnL intron and nuclear ITS were used to reconstruct phlogenetic relationships. These results indicate that (1) Heterostemon is monophyletic; (2) the majority of Elizabetha species form a poorly supported, monophyletic group sister to Paloue; and (3) Paloveopsis is nested within Paloue. Intergeneric hybridization between species of Paloue and Elizabetha has been identified and traditional generic, species, and intraspecies boundaries are assessed and reevaluated using the results of the combined phylogenetic analysis.
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Enriquebeltrania, a genus of trees and shrubs endemic to Mexico, traditionally has been included in Euphorbiaceae (tribe Adelieae, subfamily Acalyphoideae). It was previously thought to be monotypic ...with a disjunct distribution on the Yucatan Peninsula and along the Pacific coast
in Jalisco and Sinaloa. There is some question about whether Enriquebeltrania should be treated as distinct from Adelia. Morphological and molecular characters (trnL-F spacer and rbcL DNA sequences) were utilized in phylogenetic analyses to determine if Enriquebeltrania
belongs to the tribe Adelieae, to test whether it should be recognized as a genus separate from Adelia, and to determine the number of species that should be recognized. Results indicate that Enriquebeltrania does not belong to tribe Adelieae, that it should be recognized as
a genus separate from Adelia, and that it consists of two species. The second species, Enriquebeltrania disjuncta, is named and described here.
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A detailed account is presented of the historical events relating to the discovery of Croton alabamensis var. alabamensis (Euphorbiaceae s.s.) by E.A. Smith in 1877 and its subsequent study by 19th ...century American botanists. A lectotype is designated and its provenance discussed. Este artículo presenta una descripción detallada de los eventos relacionados con el descubrimiento de Croton alabamensis var. alabamensis (Euphorbiaceae s.s.) por E.A. Smith en 1877 y su estudio subsiguiente por botánicos en el siglo XIX. Además, se designa un lectotipo para esta especie y se discute su origen.
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55.
Phylogeny of the eudicots Savolainen, Vincent; Fay, Michael F.; Albach, Dirk C. ...
Kew bulletin,
2000, Volume:
55, Issue:
2
Journal Article
Peer reviewed
A phylogenetic analysis of 589 plastid rbcL gene sequences representing nearly all eudicot families (a total of 308 families; seven photosynthetic and four parasitic families are missing) was ...performed, and bootstrap re-sampling was used to assess support for clades. Based on these data, the ordinal classification of eudicots is revised following the previous classification of angiosperms by the Angiosperm Phylogeny Group (APG). Putative additional orders are discussed (e.g. Dilleniales, Escalloniales, Vitales), and several additional families are assigned to orders for future updates of the APG classification. The use of rbcL alone in such a large matrix was found to be practical in discovering and providing bootstrap support for most orders. Combination of these data with other matrices for the rest of the angiosperms should provide the framework for a complete phylogeny to be used in macro-evolutionary studies.
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Carex roanensis F. J. Hermann was rediscovered near Ernestville, Unicoi County, Tennessee. The habitat was a gneiss ledge overlain with rich soil on a steep hardwood slope near Fagus and Betula ...trees. Specimens (Churchill 85132; 85221) have been deposited at the National, Michigan State, University of Tennessee and Vanderbilt herbaria.
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