Phylogeny and Circumscription of the Subfamily Olisbeoideae

Stone, Robert Douglas

doi:10.1007/978-3-030-99742-7_6

Cited by 4 publications

(5 citation statements)

References 69 publications

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“…& Perr., the paleotropical Lijndenia Zoll. & Moritzi, and the African-Malagasy Warneckea Gilg, in accordance with morphological and molecular findings ( Jacques-Félix, 1978;Bremer, 1982;Stone, 2006aStone, , 2014Stone & Andreasen, 2010;Stone, 2022a). The members of Memecylon s.s. are characterized by a combination of very hard wood; leaves opposite, estipulate, and apparently 1-nerved (less often "subtrinerved" sensu Jacques-Félix et al, 1978;Jacques-Félix, 1983, 1985a; a general lack of indumentum; flowers small and 4-merous; anther connectives enlarged and with a dorsal oil-gland (or with gland reduced or absent in some species or species-groups); and fruits baccate with 1-few large seeds and embryo foliaceous and convoluted.…”

Section: Introductionsupporting

confidence: 82%

Revised treatment of Memecylon section Buxifolia (Melastomataceae) in Madagascar

Stone¹

2022

Candollea

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Memecylon sect. Buxifolia R.D. Stone (Melastomataceae, Olisbeoideae) is a group of forest shrubs and small understory trees distributed from tropical East Africa (Kenya and Tanzania) to eastern South Africa and with a disjunct occurrence in western and northern Madagascar. In a previous treatment, three endemic Malagasy species of this section were recognized: M. amplifolium R.D. Stone, M. buxifolium Blume (= M. perrieri Danguy), and M. multinode Jacq.-Fél. The present work describes and illustrates six new species from Madagascar belonging to this section: M. ambilobense R.D. Stone, M. angustatum R.D. Stone, M. leptophyllum R.D. Stone, M. minutifolium R.D. Stone, M. oblanceolatum R.D. Stone, and M. reductum R.D. Stone. With these revisions, the flora of Madagascar now holds nine species of Memecylon sect.Buxifolia, for which a formal taxonomic treatment is provided including a dichotomous key. The conservation status of each species is provisionally assessed in accordance with the IUCN Red List Categories and Criteria. Résumé

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Section: Introductionsupporting

confidence: 82%

Revised treatment of Memecylon section Buxifolia (Melastomataceae) in Madagascar

Stone¹

2022

Candollea

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“…The genus Memecylon L. (Melastomataceae, Olisbeoideae) comprises > 350 species of shrubs or small to medium-sized trees (Renner et al, 2023) and has a wide distribution in the Old-World tropics, mainly in the understory of evergreen humid forest. In accordance with morphological and molecular findings ( Jacques-Félix, 1978;Bremer, 1982;Stone, 2006aStone, , 2014Stone, , 2022aStone & Andreasen, 2010), it is now circumscribed to exclude the monospecific western and central African genus Spathandra Guill. & Perr., the paleotropical Lijndenia Zoll.…”

Section: Introductionmentioning

confidence: 69%

“…Lijndenia roborea (Naudin) Jacq.-Fél. has similar leaves, but the cymules have a pair of persistent bracteoles fused to form a cupule immediately subtending each flower (Stone, 2017(Stone, , 2022a, vs. bracts and bracteoles rapidly deciduous in M. fodinae. Memecyloni pulvinato Jacq.-Fél.…”

Section: Holotypus: Madagascar Reg Analanjirofo [Provmentioning

confidence: 99%

“…& Moritzi, and the African -Malagasy Warneckea Gilg. The members of Memecylon sensu stricto are characterized by a combination of very hard wood; leaves opposite, estipulate, and apparently 1-nerved (less often "subtrinerved" sensu Jacques-Félix et al, 1978;Jacques-Félix, 1983, 1985a; a general lack of indumentum; flowers small and 4-merous; anther-connectives enlarged and with a dorsal oilgland (or with gland reduced or absent in some species or species-groups); and fruits baccate with 1-few large seeds and embryo foliaceous and convoluted (Stone, 2022a).…”

Section: Introductionmentioning

confidence: 99%

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Twenty-four new species of Memecylon (Melastomataceae) from Madagascar

Stone

2023

Candollea

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Memecylon L. (Melastomataceae, Olisbeoideae) is a widespread paleotropical genus of forest shrubs and small trees and is one of the ten most species-rich genera of woody plants in Madagascar. All of the Malagasy species are endemic to the island, and most of them are known from just one or two sites. As part of ongoing work toward a comprehensive taxonomic revision, twenty-four new Malagasy species are described and illustrated here: M

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“…Since January 2020, 66 names of Memecylon new to science have been published, mainly from Madagascar (Stone 2020(Stone , 2022a(Stone , 2022b(Stone , 2023 and also from India (IPNI, continuously updated). In accordance with morphological and molecular findings (Jacques-Félix 1978;Bremer 1982;Stone 2006Stone , 2014aStone , 2022cStone & Andreasen 2010), Memecylon is now circumscribed to exclude the monospecific western and central African genus Spathandra Guill. & Perr., the paleotropical Lijndenia Zoll.…”

Section: Introductionmentioning

confidence: 73%

The endemic plant species of Ebo Forest, Littoral Region, Cameroon with a new Critically Endangered cloud forest shrub,Memecylon ebo(Melastomataceae-Olisbeoideae)

Stone,

Tchiengué,

Cheek

2023

Preprint

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SummaryWe emphasise the urgent need to conserve the Ebo forest (Littoral Region, Cameroon), which holds 10 strict endemic plant species and 15 near endemics for a total of 25, a very high number far exceeding the threshold for its recent status as an Important Plant Area (IPA). We describe a further strict endemic species from the Ebo Forest,Memecylon ebosp. nov. (Melastomataceae-Olisbeoideae) placed in sect.Afzelianadue to its ellipsoid blue-green fruits. The yellow petals and jade green anther-connectives ofM. eboare unique in the genusMemecylonas a whole, among its >400 species ranging overall from Africa to the western Pacific.Memecylon ebois assessed as Critically Endangered (CR) using the 2012 IUCN standard due to the small range size and the extremely high and ongoing threats of logging at Ebo, and also due to subsequent threats of potential oil palm plantation and mining projects. With the addition ofMemecylon ebo, the tally of Critically Endangered plant species recorded from Ebo forest is now the highest of any IPA in Cameroon, equalling that of, Ngovayang with 24 CR species.

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Phylogeny and Circumscription of the Subfamily Olisbeoideae

Cited by 4 publications

References 69 publications

Revised treatment of Memecylon section Buxifolia (Melastomataceae) in Madagascar

Revised treatment of Memecylon section Buxifolia (Melastomataceae) in Madagascar

Twenty-four new species of Memecylon (Melastomataceae) from Madagascar

The endemic plant species of Ebo Forest, Littoral Region, Cameroon with a new Critically Endangered cloud forest shrub,Memecylon ebo(Melastomataceae-Olisbeoideae)

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