Caraipa Andina (Clusiaceae), a New Species From the Venezuelan Andes, and Its Biogeographical Implications

C., Gerardo A. Aymard; Campbell, Lisa M.

doi:10.1590/2175-7860200859211

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…The vegetation of these Cordillera have a phytogeographical connection with the Guayana Shield in northeastern South America (Neill, 2005). As a consequence, an important number of plant genera once thought to be endemic to the sandstone mountains (Tepuis) of the Guayana region have been found to occur disjunctly on the sandstone portions of the Andean cordilleras, but not elsewhere in the Andean region (Berry & Riina, 2005;Aymard & Campbell, 2008). Rapatea is distinguished from other genera in the family by its laterally compressed inflorescences, which are subtended by two conspicuous involucral bracts that contain a capitate or elongate assemblage of flowers (Stevenson, et al, 1998;Stevenson, 2004).…”

Section: Introductionmentioning

confidence: 99%

Novedades en Rapatea (Rapateaceae) para Colombia

Aymard¹,

Arellano-Peña

2016

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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Rapatea isanae, from the upper Isana [Içana] river, Guianía Department, Colombia, is described and illustrated, and its morphological relationships with allied species are discussed. This taxon is remarkable for Rapatea in its small stature (15-30 cm tall) and leaves, and it is only the second species with white petals in a genus that otherwise has only yellow petals. It is most closely R. spruceana, with the base of the leaf blade gradually tapering from the intergrading into the petiole, and the bractlet of the spikelet and sepal shape. However, this new species differs from R. spruceana in its shorter size, sparse verrucose on the lower surface, the length of the attenuate portion of the involucral bracts, and the shape and color of the petals. It also has similarities to R. longipes and R. modesta in its ventricose sheath-leaf, inflorescence shape, and bractlets equal in length. A previously described species from Colombia is restablished (i.e., R. modesta), and one variety is elevated to the rank of species (i.e., R. paludosa var. sessiliflora to R. sessiliflora ). An updated key to the all twenty five species of Rapatea, and an abstract in Kuripaco are also provided. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat. Novedades en Rapatea (Rapateaceae) para Colombia ResumenRapatea isanae, una nueva especie del alto río Isana, Departamento del Guianía, Colombia, es descrita, ilustrada, y sus relaciones morfológicas con las especies afines son discutidas. Esta especie es notable en el género Rapatea por el tamaño de las plantas (entre 15 y 30 cm de altura), las hojas muy pequeñas, y los pétalos blancos, siendo la segunda especie con este carácter en un género en el cual predominan los pétalos amarillos. Por la base de las hojas transformándose gradualmente en un pecíolo, la morfología de las bractéolas de las espiguillas y los sépalos, R. isanae está relacionada con R. spruceana. Por las vainas basales de las hojas ventricosas, la forma convexa de las inflorescencias y las bractéolas del mismo tamaño con R. longipes y R. modesta, respectivamente. Sin embargo, esta nueva especie difiere de R. spruceana por ser plantas muy pequeñas, el envés esparcidamente verrugoso, el largo de la porción atenuada de las brácteas involúcrales y la forma y color de los pétalos. Se restablece una especie previamente descrita para Colombia (i.e., R. modesta), y una variedad es elevada al rango de especie (i.e., R. paludosa var. sessiliflora a R. sessiliflora). Adicionalmente se presenta una clave actualizada de las 25 especies aceptadas de Rapatea y un resumen en Kuripaco. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat.

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Section: Introductionmentioning

confidence: 99%

Novedades en Rapatea (Rapateaceae) para Colombia

Aymard¹,

Arellano-Peña

2016

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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“…This is based on four specimens we have determined at FT, initially identified as C. subincanus: Bono 4223, Bono 5023, Bono 5125, and Bono 7773; all come from the vicinity of San Cristóbal, between 800-1000 m. This unusual disjunction between the Andes and the Guayana Shield is not new and is known from other groups, such as Bonnetia paniculata Spruce & Benth. and Caraipa (Aymard & Campbell 2008).…”

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The Neotropical Croton sect. Geiseleria (Euphorbiaceae): Classification Update, Phylogenetic Framework, and Seven New Species from South America

Riina

Caruzo

et al. 2021

annals

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A revised assessment of Croton L. sect. Geiseleria (A. Gray) Baill. is provided. The section as now circumscribed includes 84 species ranging across warm areas of the Americas. A nuclear ITS phylogeny of 150 accessions from 83 species and a chloroplast trnL-F phylogeny of 89 accessions from 65 species were generated to confirm correct phylogenetic placement of the species and to determine if any species previously included in the section should now be excluded. Seven new species are described, and we present a taxonomic synopsis that lists all currently accepted species along with their synonyms, distributions, and pertinent comments. We also recognize four subsections within Croton sect. Geiseleria and list their corresponding species. Based on both morphological and molecular criteria, we now recognize C. lagunillae Croizat as a distinct species, rather than as a variety of C. guildingii Griseb. (now treated as C. suavis Kunth), and we treat C. ramillatus Croizat var. magniglandulifer V. W. Steinm. as a species, C. magniglandulifer (V. W. Steinm.) B. W. van Ee. We also exclude C. tetradenius Baill. from Croton sect. Geiseleria (A. Gray) Baill. along with related species such as C. pulegiodorus Baill. and C. leptobotryus Müll. Arg., which are either members of Croton sect. Adenophylli Griseb. or else may merit new sectional status. We also exclude C. waltherioides Urb., although it is not clear to which section of Croton it belongs.

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