Searching for the taxonomic position of the African genus <i>Colletoecema</i> (Rubiaceae): morphology and anatomy compared to an <i>rps</i>16-intron analysis of the Rubioideae

Piesschaert, Frederic; Andersson, Lennart; Jansen, Steven; Dessein, Steven; Robbrecht, Elmar; Smets, Erik

doi:10.1139/b00-002

Cited by 28 publications

(33 citation statements)

References 21 publications

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“…in agreement with the results of robbrecht & Manen (2006) andrydin et al (2008), Colletoecema is sister to all other rubioideae in our Bayesian analysis, but without support (bs < 50; PP = 0.86). This result also confirms the finding of Piesschaert et al (2000) based on rps16 intron sequences that Colletoecema does not belong to Morindeae (Petit 1963) or Psychotrieae (robbrecht 1993). However, a relationship between Colletoecema and Ophiorrhiza, as inferred with weak support by Piesschaert et al (2000), is not sup-ported here.…”

Section: Relationships Among Basal Rubioideaesupporting

confidence: 88%

“…in addition the leaves of C. magna are larger and more distinctly obovate than observed in C. dewevrei and the fruits are also sessile and more than double in size. Also pollen is slightly different: grains of C. dewevrei are described as exclusively 3-colporate (Piesschaert et al 2000), while in C. magna both 3-and 4-colporate pollen grains were observed. This kind of pollen variation is not uncommon in Rubiaceae.…”

Section: Diagnostic Characters and Relationshipsmentioning

confidence: 92%

“…Based on molecular and morphological data, Piesschaert et al (2000) came to the conclusion that Colletoecema is not a member of Psychotrieae nor a member of Morindeae or any other formal or informal group close to Psychotrieae. Their analysis of rps16 intron sequences placed Colletoecema as sister to Ophiorrhiza in a weakly supported clade.…”

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confidence: 99%

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A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae

Sonké¹,

Dessein²,

Taedoumg³

et al. 2008

blum - j plant tax and plant geog

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SUMMAryColletoecema magna, a new species from the Ngovayang Massif (southern cameroon) is described and illustrated. A comparative morphological study illustrates the similar placentation and fruit anatomy of the novelty and Colletoecema dewevrei, the only other species of the genus. Colletoecema magna essentially differs from C. dewevrei by its sessile flowers and fruits, the corolla tube that is densely hairy above the insertion point of the stamens and the anthers that are included. Further characters that separate the novelty are its larger leaves, more condensed inflorescences, and larger fruits. Its position within Colletoecema is corroborated by atpB-rbcL and rbcL chloroplast sequences. The relationships among the basal lineages of the subfamily rubioideae, to which Colletoecema belongs, are briefly addressed. Based on our present knowledge, a paleotropical or tropical African origin of the rubioideae is hypothesized.

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Section: Relationships Among Basal Rubioideaesupporting

confidence: 88%

Section: Diagnostic Characters and Relationshipsmentioning

confidence: 92%

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A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae

Sonké¹,

Dessein²,

Taedoumg³

et al. 2008

blum - j plant tax and plant geog

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“…In fact, Xiao & Zhu's (2007) results are compatible with those of Andersson & Rova (1999). Piesschaert et al (2000) added seven more genera of Rubioideae to the morphological and molecular matrix and following their cladistic analysis Lasianthus, Saldinia and Trichostachys form a closely related group and Perama is more distantly related to this group. Piesschaert et al (2000) also found additional morphological and anatomical characters to support Petit's (1964) ideas on the tribal characters of the Psychotrieae and Morindeae.…”

Section: The Position In Rubiaceaementioning

confidence: 69%

“…Piesschaert et al (2000) added seven more genera of Rubioideae to the morphological and molecular matrix and following their cladistic analysis Lasianthus, Saldinia and Trichostachys form a closely related group and Perama is more distantly related to this group. Piesschaert et al (2000) also found additional morphological and anatomical characters to support Petit's (1964) ideas on the tribal characters of the Psychotrieae and Morindeae. The Psychotrieae mostly have terminal inflorescences, wood with radial multiple vessels, and seeds with small embryos and horny (not oily) endosperm.…”

Section: The Position In Rubiaceaementioning

confidence: 99%

A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae)

Zhu¹,

Roos²,

Ridsdale³

2012

blum - j plant tax and plant geog

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Based on herbarium collections, the Malesian species of the genus Lasianthus are revised. A total of 131 species including 5 subspecies and 6 varieties are recognized from the Malesian region, of which 41 species, 3 subspecies and 3 varieties are described as new, and 3 new combinations are made for varieties. 22 species names and 15 variety names are reduced to synonyms. Ten species names and 2 varieties are treated as dubious mainly because their types cannot be traced. Additionally, 11 species are further excluded from Lasianthus. All species are described and a key to Malesian Lasianthus is given. TAXONOMIC HISTORY Generic delimitationLasianthus Jack was established in 1823 based on two Sumatran species, Lasianthus cyanocarpus (later selected as the type of the genus; see below) and Lasianthus attenuatus. In the same year Blume (1823) listed several plant species under the genus name Mephitidia attributed to Reinwardt but described one species M. hexandra himself. The genus was redescribed two years later by Reinwardt (1825), but no species were mentioned by him. According to the International Code of Botanical Nomenclature (McNeill et al. 2006), the genus Mephitidia is attributed to Reinwardt ex Blume with M. hexandra Blume as type. Blume (1826Blume ( -1827 realized that Mephitidia was synonymous with Lasianthus Jack and provided accounts of the Javanese species. Mephitidia continued to be used by some authors because they were aware of an earlier publication of Lasianthus Adans. (= Gordonia) for a genus in the Theaceae. De Candolle (1830) was the most significant of these authors and Korthals (1851) was the last author to use Mephitidia for the Malesian species in taxonomic publications. Later, Lasianthus Jack has been conserved for the genus treated here. Blume (1823) described from Java a monotypic genus Lito santhes, which is closely related to Lasianthus. Inherently Ridley (1923a) reduced this genus to a section of Lasianthus, however Bakhuizen van den Brink (1965) retained Litosanthes as a separate genus based on three characters: imbricate corolla, forked stipules, and pedunculate inflorescences. Deb & Gangopadhyay (1991) transferred some Indian taxa to Litosan thes, but subsequently Gangopadhyay & Chakrabarty (1992) reduced these taxa of Litosanthes to a section of Lasianthus (see section below).The circumscription of Lasianthus Jack was more or less modified by later authors, especially referring to the number of ovary locules or pyrenes. In Jack's description Lasianthus has ovaries with 4 locules each with a single basal erect ovule, which normally develops into a drupe with 4 pyrenes. Blume (1826-1827) followed Jack's view, but described more variation based on more Malesian species: 4-9 locules and a drupe with 4-9 pyrenes. Wight (1846) modified the genus by adding a species with a 2-locular ovary and drupes with 2 pyrenes (L. foetens Wight = Saprosma foetens (Wight) K.Schum. (1891)). Korthals (1851) established a subgenus of Dysosmia based on a Javanese species Mephitidia dichotoma Ko...

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Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook

Razafimandimbison,

Rydin

2024

TAXON

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The use of molecular data in phylogenetic reconstruction during more than three decades has greatly improved our understanding of the macroevolutionary history of the coffee family (Rubiaceae) and has provided a solid basis for improvement of its classification. Based on the results of 130 studies, among them most recent phylogenomic works, we present a consensus phylogeny and a robust classification of Rubiaceae that shed light on the evolutionary success of this highly diverse angiosperm family and can serve as a framework for ecological and evolutionary studies. There are more than 14,000 species and about 580 accepted genera of Rubiaceae that are assigned to 71 tribes, of which 68 are classified in two subfamilies (Dialypetalanthoideae with 38 tribes and Rubioideae with 30 tribes). Three tribes (Acranthereae, Coptosapelteae, Luculieae) remain unclassified as to subfamily. Sixty‐three of these 71 tribes are assigned to nine informal alliances (four in Rubioideae and five in Dialypetalanthoideae). These tribes are listed in alphabetical order within their respective alliances. Five tribes, one (Coussareeae) in Rubioideae and four (Airospermeae, Jackieae, Retiniphylleae, Steenisieae) in Dialypetalanthoideae, are excluded from these alliances due to unclear or conflicting phylogenetic positions. Thirty‐six tribes retain their tribal status but receive new generic limits to remedy their previous para‐ or polyphyletic nature. Twenty‐nine tribes not implemented in previous classifications have been added, of which three (Chioneae, Glionnetieae, Temnopterygeae) are newly described here. Basic information on phylogenies, distributions, former classifications, and useful references to previous works are provided for all accepted tribes, and future perspectives are discussed.

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Searching for the taxonomic position of the African genus Colletoecema (Rubiaceae): morphology and anatomy compared to an rps16-intron analysis of the Rubioideae

Cited by 28 publications

References 21 publications

A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae

A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae

A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae)

Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook

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