Topic
Gorgonidium
About: Gorgonidium is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 72 citations.
Papers
TL;DR: A great diversity in chromosome numbers as well as in chromosome size and constitution is found in the family Araceae.
Abstract: The chromosome numbers of 75 species belonging to the family Araceae have been determined. The numbers for 53 species are reported for the first time. One number differs from previous reports (Aglaodorum), and one number is corrected (Phymatarum). Within 15 genera (Gymnostachys, Pothoidium, Alloschemone, Heteropsis, Holochlamys, Anaphyllopsis, Dracontioides, Pseudohydrosme, Montrichardia, Bucephalandra, Taccarum, Asterostigma, Gorgonidium, Spathantheum and Ulearum) the chromosome numbers have not previously been determined. The total number of genera cytologically investigated is now 99 (c. 94%).
A great diversity in chromosome numbers as well as in chromosome size and constitution is found. The results are discussed in relation to the phylogeny and the previously published classifications of the family.
A total list of chromosome numbers counted (>700 species) in the Araceae is presented (Appendix).
60 citations
TL;DR: Two unispecific Andean genera are described as new to science in the tribe Spathicarpeae (Araceae) and illustrated, based on two species formerly placed in the genus Asterostigma, and Croatiella seems to be an isolated lineage within the core Spathimpeae.
Abstract: Goncalves, E. G.: Two new Andean genera for the tribe Spathicarpeae (Araceae). – Willdenowia 35: 319-326. – ISSN 0511-9618; © 2005 BGBM Berlin-Dahlem. doi:10.3372/wi.35.35214 (available via http://dx.doi.org/) Two unispecific Andean genera are described as new to science in the tribe Spathicarpeae (Araceae) and illustrated, based on two species formerly placed in the genus Asterostigma. The genus Incarum is erected to accommodate A. pavonii that occurs in Andean Peru, Bolivia and Ecuador, and the new combination Incarum pavonii is validated. The genus Croatiella is erected to accommodate A. integrifolium from Ecuador and the new combination Croatiella integrifolia is validated. Incarum is considered related to the Andean genera Gorgonidium and Spathantheum, whereas Croatiella seems to be an isolated lineage within the core Spathicarpeae. The arguments to support these new genera come from cpDNA sequence data, as well as from biogeographical and morphological aspects. The neotropical genus Asterostigma Fisch. & C. A. Mey. was formerly known as having nine species, most of them distributed in coastal Brazil, but including two species with an Andean distribution (Goncalves 1999). Asterostigma along with Gorgonidium Schott, Spathantheum Schott, Mangonia Schott, Taccarum Brongn. ex Schott, Gearum N. E. Br., Spathicarpa Hook. and Synandrospadix Engl. form the wholly neotropical tribe Spathicarpeae (sensu Mayo & al. 1997). For a taxonomic revision of this tribe (Goncalves, in prep.), its members and putative allies have been evaluated by means of cpDNA phylogeny and morpho-anatomical studies (unpubl. data). The results of this broad survey will be published elsewhere, but one result is that the two species of Asterostigma with an Andean distribution have been shown to be sufficiently different from all other genera in the tribe (and also from each other) to represent two separate genera, which are here described as new to science.
10 citations
1 Jan 1988
6 citations
TL;DR: Two new species of Araceae from South America are described and illustrated, one of which differs from all other species of the genus by the unusual aspect of the style that has an inflated, more or less ovoid apical portion.
Abstract: Bogner, J. & Goncalves, E. G.: Two new aroids from South America. — Willdenowia 32: 323–329. 2002. — ISSN 0511-9618. Two new species of Araceae from South America are described and illustrated. The one is Anthurium ensifolium from Bahia, eastern Brazil, which is tentatively placed in A. sect. Urospadix subsect. Obscureviridia. It seems close to A. cleistanthum, a poorly known species from Espirito Santo, Brazil, and also resembles A. erskinei from Bahia. The other is Gorgonidium bulbostylum from Andean Bolivia, which differs from all other species of the genus by the unusual aspect of the style that has an inflated, more or less ovoid apical portion. The stigma is also peculiar in being globose and conspicuously lobed, with lobes upwardly directed.
4 citations
TL;DR: A new Gorgonidium species from Bolivia, G. beckianum, is described and illustrated, characterized by its globular ovary, a subsessile, discoid stigma and shorter, slightly clavate and slender staminodes of the female flowers.
Abstract: Bogner, J.: Gorgonidium beckianum (Araceae), a new species from Bolivia. — Willdenowia 38: 195–200. — ISSN 0511-9618; © 2008 BGBM Berlin-Dahlem. doi:10.3372/wi.38.38114 (available via http://dx.doi.org/) A new Gorgonidium species from Bolivia, G. beckianum, is described and illustrated. It is characterized by its globular ovary, a subsessile, discoid stigma and shorter, slightly clavate and slender staminodes of the female flowers. G. beckianum is closely related to G. vermicidum and G. striatum, which mainly differ by an ovoid ovary, a distinct style and a star-like or subhemispheric stigma as well as by the shape of their staminodes.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2008 | 1 |
| 2005 | 1 |
| 2003 | 1 |
| 2002 | 1 |
| 1989 | 1 |
| 1988 | 1 |