Topic
Ophellantha
About: Ophellantha is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 468 citations.
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TL;DR: This revised synopsis of the taxa of Euphorbiaceae recognizes, and provides keys to, 5 subfamilies, 49 tribes, and 317 genera, and proposes two new tribes and four new subtribes.
Abstract: This revised synopsis of the taxa of Euphorbiaceae recognizes, and provides keys to, 5 subfamilies, 49 tribes, and 317 genera. Two new tribes, Croizatieae and Podocalyceae, are proposed, as well as four new subtribes, Leptopinae, Podocalycinae, Pycnocominae, and Tetracoccinae; five taxa are reduced to subtribal status. One genus (Ophellantha) is reduced to a section; 14 new binomial combinations are proposed. Lectotypifications are provided for almost all taxa not previously typified
477 citations
TL;DR: Wood anatomical features support the generic status of Brasiliocroton, which molecular data place as the closest sister group to Croton, once Astraea has been removed from Croton and placed sister to AcidOCroton and Ophellantha.
Abstract: A new genus and species of Euphorbiaceae s.s., Brasiliocroton mamoninha, is described from two disjunct areas of lowland forest remnants in eastern and northeastern Brazil. It is a member of tribe Crotoneae and was previously confused with Croton and Micrandra. The resemblance to Micrandra is based on the branched inflorescences and terminal position of the pistillate flowers, trigonous capsules, and ovate leaves with basal glands, but the stamens are more numerous and the pollen is inaperturate (like Croton). Brasiliocroton has a stellate-rosulate indumentum like some Croton species, but its anthers are erect in bud, and the position of the pistillate flowers is anomalous in Croton. Molecular data place Brasiliocroton as the closest sister group to Croton, once Astraea has been removed from Croton and placed sister to Acidocroton and Ophellantha. Wood anatomical features support the generic status of Brasiliocroton.
26 citations
Journal Article•
TL;DR: A new species 0f Acidocroton griseb.
Abstract: A new species 0f Acidocroton griseb. sect. Ophellantha (Euphorbiaceae), wich confirm this genus lor Southamerica, is described and illustrated. Some aspects of the dry forest where inhabith this species are commented.
3 citations
01 Jan 2013
TL;DR: The new species Acidocroton madrigalensis is described and illustrated from the state of Tabasco, Mexico and is characterized by its diminutive, non-spinous stipules, large leaves that are shortly petiolate, and staminate flowers with 20 to 35 stamens.
Abstract: The new species Acidocroton madrigalensis is described and illustrated from the state of Tabasco, Mexico. It is known only from the Sierra El Madrigal and the Cerro La Campana, where it is a frequent component of the under story of tropical rain forest, occurring on limestone outcrops. It belongs to section Ophellantha and is characterized by its diminutive, non-spinous stipules, large leaves that are shortly petiolate, and staminate flowers with 20 to 35 stamens. A table is presented that provides the principal differences among A. madrigalensis and the other two species of the genus present in Mexico, A. spinosus y A. steyermarkii.