Novitates Gabonenses 68. The Genus Cassipourea (Rhizophoraceae) in Continental Tropical Africa With Emphasis on Gabon: Subgeneric Division, Identification Keys, and Description of Two New Species

Breteler, F.J.

doi:10.1017/s0960428608005040

Cited by 6 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polystemonous androecia (i.e. with more than double the number of stamens than sepals) are present in some Rhizophoraceae (this study, Figs 4, 6; Juncosa, 1988; Setoguchi et al ., 1996, 1998; Breteler, 2008; see also below) and Caryocaraceae (this study, Fig. 29; Vogel, 1968; Prance & da Silva, 1973; Dickison, 1990).…”

Section: Discussionmentioning

confidence: 50%

“…Seeds with an aril are common in the study group. They were recorded in some Rhizophoraceae (Tobe & Raven, 1988b; Schwarzbach & Ricklefs, 2000), such as part of Macarisieae (Juncosa & Tobe, 1988; Comiphyton , Floret, 1974, 1976; Tobe & Raven, 1988b; Blepharistemma , Tobe, 1987; Tobe & Raven, 1988b; Cassipourea , Tobe & Raven, 1987b, 1988b; Breteler, 2008), Rhizophoreae ( Rhizophora , Warming, 1883, and other genera, Juncosa, 1988), and part of Gynotrocheae ( Pellacalyx , Gynotroches, Carallia ; Juncosa, 1988, Crossostylis , Corner, 1976; Juncosa & Tobe, 1988; Tobe & Raven, 1988b; Setoguchi et al ., 1992, 1998), the same structure forming a wing in Anopyxis, Macarisia and Sterigmapetalum (Tobe & Raven, 1988b). Among Erythroxylaceae Aneulophus has an aril (Corner, 1976), Ctenolophonaceae have a stringy aril (Winkler, 1931; van Hooren & Nooteboom, 1988a) and in Linaceae Tirpitzia potentially has an aril (Forman, 1965).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Matthews

Endress

2011

Botanical Journal of the Linnean Society

View full text Add to dashboard Cite

Within the rosid order Malpighiales, Rhizophoraceae and Erythroxylaceae (1) are strongly supported as sisters in molecular phylogenetic studies and possibly form a clade with either Ctenolophonaceae (2) or with Linaceae, Irvingiaceae and Caryocaraceae (less well supported) (3). In order to assess the validity of these relationships from a floral structural point of view, these families are comparatively studied for the first time in terms of their floral morphology, anatomy and histology. Overall floral structure reflects the molecular results quite well and Rhizophoraceae and Erythroxylaceae are well supported as closely related. Ctenolophonaceae share some unusual floral features (potential synapomorphies) with Rhizophoraceae and Erythroxylaceae. In contrast, Linaceae, Irvingiaceae and Caryocaraceae are not clearly supported as a clade, or as closely related to Rhizophoraceae and Erythroxylaceae, as their shared features are probably mainly symplesiomorphies at the level of Malpighiales or a (still undefined) larger subclade of Malpighales, rather than synapomorphies. Rhizophoraceae and Erythroxylaceae share (among other features) conduplicate petals enwrapping stamens in bud, antepetalous stamens longer than antesepalous ones, a nectariferous androecial tube with attachment of the two stamen whorls at different positions: one whorl on the rim, the other below the rim of the tube, the ovary shortly and abruptly dorsally bulged and the presence of a layer of idioblasts (laticifers?) in the sepals and ovaries. Ctenolophonaceae share with Rhizophoraceae and/or Erythroxylaceae (among other features) sepals with less than three vascular traces, a short androgynophore, an ovary septum thin and severed or completely disintegrating during development, leading to a developmentally secondarily unilocular ovary, a zigzag-shaped micropyle and seeds with an aril.

show abstract

Section: Discussionmentioning

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Matthews

Endress

2011

Botanical Journal of the Linnean Society

View full text Add to dashboard Cite

show abstract

“…A considerable amount of new information has been published, including new records for the country (Walters et al 2011), descriptions of new species (e.g. Sosef et al 2007, Bissiengou & Sosef 2008, Breteler 2008, Ntore et al 2010, Fischer & Lachenaud 2013 and taxonomic revisions of several genera (e.g. Onana 2008, Goyder 2009, Breteler 2010, Sonké et al 2012, Lachenaud & Zemagho 2015.…”

Section: Introductionmentioning

confidence: 99%

Novitates Gabonenses 88: additions to the flora of Gabon and new records of little-known species

Lachenaud¹,

Stévart²,

Boupoya³

et al. 2018

Pl. Ecol. Evol.

View full text Add to dashboard Cite

Background and aims – The intensive botanical prospections carried out in Gabon since the publication of the national checklist in 2006 have resulted in c. 34 300 new specimens (amounting to 30% of all collections made in the country) and an annual increase of 25 species in average. As a result, 5175 species of vascular plants are now recorded from Gabon, of which 650 are considered endemic. However, most of the recent discoveries have not yet been published. This paper is the first of a series documenting additions to the flora of Gabon, and new records of poorly known species. It concerns specifically new records from the Lower Ogooué Ramsar site, the third largest delta of Africa, and certainly the most intact, which includes 80% of the country’s wetlands and a wide variety of other habitats.Methods – The new records presented here come essentially from fieldwork conducted in Gabon between 2008 and 2016 by the authors and colleagues. Further information comes from the study of herbarium specimens in BR, BRLU, K, LBV, MO, P and WAG. For each species, information on distribution and ecology is given, and the studied Gabonese collections listed. In case of rare or range-restricted species, collections from other countries are also listed, and a distribution map is provided, as well as an evaluation of the conservation status based on the categories and criteria of the IUCN Red List.Key results – We report 18 additions to the flora of Gabon, including four genera new to the country (Capparis, Gisekia, Hoffmanniella and Leptochloa) and the first records of the neotropical Justicia secunda being naturalised in tropical Africa. New distribution records are also provided for 16 rare Gabonese endemics or near-endemics. Some species are also newly reported from Cameroon (Cissus leemansii, Salacia coronata) and Equatorial Guinea (Cissus leemansii, C. louisii, Lychnodiscus grandifolius, Placodiscus resendeanus, Rutidea gabonensis, Uvaria bipindensis). Two species, which were reported in the 2006 checklist based on misidentifications, are excluded from the Gabonese flora.

show abstract

“…The recent new species descriptions from the coast may indicate that this area has been under-collected (see comments in Phillips 2000, Sosef et al 2007. In this checklist, species presented together for the first time in Gabon include coastal endemics Campylospermum paucinervatum (Sosef et al 2007), Cassipourea carringtoniana (Breteler 2008), Ber linia raziffera (Mackinder & Wieringa 2007), and Eriocau lon nadjae (Phillips 2000). A list of 25 littoral endemics was presented in Pongara (Dauby et al 2008).…”

Section: Lower Guinea Littoral Endemicsmentioning

confidence: 99%

Phytogeographical analysis and checklist of the vascular plants of Loango National Park, Gabon

Harris

Armstrong²,

Walters³

et al. 2012

Plecevo

View full text Add to dashboard Cite

Background and aims-Floristic inventories are the primary means by which the plant diversity of an area can be understood and are important in underpinning management plans for conservation. One of the priorities set out for Loango National Park (LNP) in an IUCN assessment of Gabon's protected areas was to produce a vascular plant checklist. Therefore, the primary goal of this research was to significantly increase the number of specimens for the park and make a concentrated effort to increase knowledge of plant diversity in the area. The secondary goal of this study was to analyse the flora of LNP in terms of phytogeography and endemism. Methods-A specimen-based botanical inventory was carried out in LNP (1005 herbarium specimens collected for this study were added to 752 existing records) and vegetation observations were made. Phytogeographical analyses were also performed using two different methods and datasets for comparison. Key results-A preliminary checklist of 686 species of vascular plants of LNP is presented, making a significant contribution to our knowledge of the flora of Gabon with more than twenty new country records. Conclusions-There is a surprisingly high proportion (15%) of the overall Gabonese flora recorded from within the park in this preliminary checklist. Further inventory within the park will undoubtedly produce a much higher percentage of the flora of the whole country. This high proportion is explained in part by the combination of restricted coastal endemics, diversity of habitats, and dynamic biological and physical processes. Phytogeographical analyses reveal different floristic relationships between the forest and savanna components of the flora suggesting different origins of these two biomes in coastal Gabon. The forest species are typically Guineo-Congolian in distribution and the savanna species are Sudano-Zambezian or widespread in distribution. Together, the faunal elements and the high diversity of the flora of Loango National Park make it a globally important site for conservation.

show abstract

Novitates Gabonenses 68. The Genus Cassipourea (Rhizophoraceae) in Continental Tropical Africa With Emphasis on Gabon: Subgeneric Division, Identification Keys, and Description of Two New Species

Cited by 6 publications

References 6 publications

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Comparative floral structure and systematics in Rhizophoraceae, Erythroxylaceae and the potentially related Ctenolophonaceae, Linaceae, Irvingiaceae and Caryocaraceae (Malpighiales)

Novitates Gabonenses 88: additions to the flora of Gabon and new records of little-known species

Phytogeographical analysis and checklist of the vascular plants of Loango National Park, Gabon

Contact Info

Product

Resources

About