Two New Taxa of Impatiens (Balsaminaceae) from the Udzungwa Mountains, Tanzania

Frimodt-Moller, Christian; Grey-Wilson, C.

doi:10.2307/4111035

Cited by 7 publications

(4 citation statements)

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“…The current taxonomic framework for continental Africa was established by Grey-Wilson (1980) who recognised 110 species in his monograph. Since then, 24 further species have been published (Abrahamczyk et al 2016; Bos 1991; Cheek and Csiba 2002; Cheek and Fischer 1999; Cheek et al 2022; Fischer 1997; Fischer et al 2003; 2021; Frimodt-Möller and Grey-Wilson 1999; Grey-Wilson 1981; Hallé and Louis 1989; Janssens et al 2009a; 2010; 2011; 2015; 2018; Pócs 2007). The three broad centres of species diversity in tropical Africa are the western African mountains, primarily the Cameroon Highlands (28 species), the E. Arc mountains of Tanzania with the Kenya Highlands (24 species) and the Albertine Rift (20 species) (Fischer et al 2021).…”

Section: Introductionmentioning

confidence: 99%

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

Cheek

2022

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Impatiens moutsambotei is described from a herbarium specimen collected at a waterfall in forest on the coastal plain, below the Mayombe Mts of the Republic of Congo. Sharing many distinctive characters with Impatiens floretii of the Doudou Mts of Gabon, it is abundantly distinguished inter alia by the leaf-blades which are lanceolate or narrowly elliptic, not ovate, their bases acute, not obtuse or broadly rounded to truncate; the reduced, peduncular bracts bearing long, filiform setae, and not entire; the proximal (upper) of the lateral united petals are entire, not bifid; the spur is curved at the base and overlaps the lower sepal, not curved through its length to describe a semi-circle and held below the lower sepal. Both species are placed in the Impatiens macroptera species aggregate. Impatiens moutsambotei is known from a single site, where it was collected nearly 30 years ago and not seen since. The new species is assessed as Critically Endangered due to threats of habitat clearance from mining and road widening, and may be already be extinct.

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Section: Introductionmentioning

confidence: 99%

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

Cheek

2022

Preprint

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“…The taxonomic framework for continental Africa was established by Grey-Wilson (1980) who recognised 110 species. Since then, 23 further species have been published (Abrahamczyk et al 2016;Bos 1991;Cheek 2022;Cheek & Csiba 2002a;Cheek & Fischer 1999;Fischer 1997;Fischer et al 2003Fischer et al , 2021Frimodt-Møller & Grey-Wilson 1999;Grey-Wilson 1981;Hallé & Louis 1989;Janssens et al 2009aJanssens et al , 2010Janssens et al , 2011Janssens et al , 2015Janssens et al , 2018Pócs 2007). The three broad centres of species diversity in tropical Africa are the western African mountains, (primarily the Cameroon Highlands) (28 species), the E Arc mountains of Tanzania with the Kenya Highlands (24 species) and the Albertine Rift (20 species) (Fischer et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Impatiens banen and Impatiens etugei (Balsaminaceae), new threatened species from lowland of the Cross-Sanaga Interval, Cameroon

et al. 2022

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SummaryWe describe two range-restricted new species to science from the genus Impatiens (Balsaminaceae), both threatened, from lowland of the Cross-Sanaga Interval of western Cameroon. The first, Impatiens banen, appears to be restricted to an open seepage microhabitat on granitic inselbergs in the lowland-submontane forest zone of the Ebo Forest in Littoral Region and is provisionally assessed using the 2012 IUCN standard as Vulnerable. Sharing characters with Impatiens burtonii and I. mannii, it differs from both, and appears to be unique in Cameroon inter alia 1) in the bicolored united lateral petals, the upper petals being white, while the lower petals are an intense pink-purple, 2) the hairy, filamentous spur, purple with a white apex, is curved along its length, almost describing a circle. Inselberg-specific species are unusual in Impatiens.The second species, Impatiens etugei, of the I. macroptera aggregate, is restricted to rocks in the Mutel River of the Kom Wum Forest Reserve of North West Region and is assessed as Critically Endangered. Having similarities with I. mackeyana and I. letouzeyi, it differs from other species in the aggregate inter alia by having opposite leaves (vs always alternate), flower exterior white (vs pink or pink-purple), and in the dorsal petal having a pair of lateral projections (vs projections absent).

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“…2016; Bos 1991; Cheek and Csiba 2002; Cheek and Fischer 1999; Fischer 1997; Fischer et al . 2003; 2021; Frimodt-Möller and Grey-Wilson 1999; Grey-Wilson 1981; Hallé and Louis 1989; Janssens et al . 2009a; 2010; 2011; 2015; 2018; Pócs 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The taxonomic framework for continental Africa was established by Grey-Wilson (1980) who recognised 110 species. Since then, 22 further species have been published (Abrahamczyk et al 2016;Bos 1991;Cheek and Csiba 2002;Cheek and Fischer 1999;Fischer 1997;Fischer et al 2003;2021;Frimodt-Möller and Grey-Wilson 1999;Grey-Wilson 1981;Hallé and Louis 1989;Janssens et al 2009a;Pócs 2007). The three broad centres of species diversity in tropical Africa are the western African mountains, primarily the Cameroon Highlands (28 species), the E. Arc mountains of Tanzania with the Kenya Highlands (24 species) and the Albertine Rift (20 species) (Fischer et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Impatiens banensp. nov. &I. etugeisp. nov. (Balsaminaceae), threatened lowland species of the Cross-Sanaga Interval, Cameroon

Cheek

Darbyshire

Onana

2022

Preprint

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SummaryWe describe two range-restricted new species to science from the genus Impatiens (Balsaminaceae), both threatened, from the Cross-Sanaga Interval of western Cameroon. The first, Impatiens banen, appears to be restricted to an open seepage microhabitat on granitic inselbergs in the lowland-submontane forest zone of the Ebo Forest in Littoral Region and is provisionally assessed using the 2012 IUCN standard as Vulnerable. Sharing characters with Impatiens burtonii and I. mannii, it differs from both, and appears to be unique in Cameroon inter alia 1) in the bicolored united lateral petals, the upper petals being white, while the lower petals are an intense pink-purple, 2) the hairy, filamentous spur, purple with a white apex, is curved along its length (through nearly 360°), almost describing a circle. Inselberg-specific species are unusual in Impatiens.The second species, Impatiens etugei, of the I. macroptera aggregate, is restricted to rocks in the Mutel River of the Kom Wum Forest Reserve of NorthWest Region and is assessed as Critically Endangered. Having similarities with I. mackeyana and I. letouzeyi, it differs from other species in the aggregate inter alia by having opposite leaves (vs always alternate), flower exterior white (vs pink or pink-purple), and in the dorsal petal having a pair of lateral projections (vs projections absent).

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Two New Taxa of Impatiens (Balsaminaceae) from the Udzungwa Mountains, Tanzania

Cited by 7 publications

References 0 publications

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

A new, Critically Endangered species of Impatiens (Balsaminaceae) from the coastal plain of the Republic of Congo

Impatiens banen and Impatiens etugei (Balsaminaceae), new threatened species from lowland of the Cross-Sanaga Interval, Cameroon

Impatiens banensp. nov. &I. etugeisp. nov. (Balsaminaceae), threatened lowland species of the Cross-Sanaga Interval, Cameroon

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