Contributions to the Flora of Tropical America: LXXIV. Revision of the New World Species of Buchnera L. (Scrophulariaceae)

Philcox, D.

doi:10.2307/4109249

Cited by 10 publications

(10 citation statements)

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“…Buchnera is the largest genus in the tropical clade with approximately 100 species distributed widely throughout Africa (Fig. 1D), and with 16 species in the New World (Philcox, 1965). Within Africa, the center of diversity for Buchnera appears to be the Zambezi region, particularly Zambia and the southern Democratic Republic of the Congo (Philcox, 1990;Mielcarek, 1996).…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic relationships within the tropical clade of Orobanchaceae

Morawetz

Randle

Wolfe

2010

TAXON

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The tropical clade of Orobanchaceae contains approximately forty genera, typically with fewer than ten species each, and contributes significantly to the variation in floral morphology found within the family. Despite the economic importance of this clade, which contains three of four most important genera of crop parasites within the family, it has been under-sampled in previous phylogenies. We tested the monophyly of the tropical clade and its major genera using DNA sequences from the nuclear (internal transcribed spacer) and plastid (rpl16, trnT-L) genomes. The tropical clade was strongly supported as monophyletic in all analyses, and four main clades were recovered. The earliest diverging lineage from the remainder of the tropical clade is comprised of the shrubby genera Asepalum and Cyclocheilon, previously placed within Cyclocheilaceae. The atypical holoparasitic Alectra alba was shown to belong within the primarily holoparasitic Harveya, and the hemiparasitic Harveya obtusifolia was shown to belong to an otherwise holoparasitic lineage within Harveya. Both New World Melasma species were included here for the first time, and these were shown to be more closely related to the Neotropical hemiparasitic Escobedia than the African Melasma lineage. These results support a previous study recognizing Nesogenes within the tropical clade of Orobanchaceae rather than the separate family Nesogenaceae.

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Section: Discussionmentioning

confidence: 99%

Phylogenetic relationships within the tropical clade of Orobanchaceae

Morawetz

Randle

Wolfe

2010

TAXON

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“…Few of the genera in clade VI are rich in species: Buchnera (100 species), Sopubia (40 species), and Striga (40 species) are the largest (Philcox, 1965(Philcox, , 1990Hansen, 1975). Branch lengths in the clade are among the longest in the PHYA tree, and there is evidence of gene duplication in the taxa that we sampled.…”

Section: The Distribution Of Holoparasitism In Orobanchaceae-mentioning

confidence: 96%

Phylogeny of the parasitic plant family Orobanchaceae inferred from phytochrome A

Bennett

Mathews²

2006

American J of Botany

169

185

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Partial sequences of the nuclear gene encoding the photoreceptor phytochrome A (PHYA) are used to reconstruct relationships within Orobanchaceae, the largest of the parasitic angiosperm families. The monophyly of Orobanchaceae, including nonphotosynthetic holoparasites, hemiparasites, and nonparasitic Lindenbergia is strongly supported. Phytochrome A data resolve six well-supported lineages that contain all of the sampled genera except Brandisia, which is sister to the major radiation of hemiparasites. In contrast to previous plastid and ITS trees, relationships among these major clades also are generally well supported. Thus, the robust phylogenetic hypothesis inferred from the PHYA data provides a much better context in which to evaluate the evolution of parasitism within the group. Ninety-eight species of Orobanchaceae, representing 43 genera, are included and Brandisia, Bungea, Cymbaria, Esterhazya, Nesogenes, Phtheirospermum, Radamaea, Siphonostegia, and Xylocalyx are confirmed as members of Orobanchaceae. The earliest diverging lineage of hemiparasites is identified for the first time; it contains Bungea, Cymbaria, Monochasma, Siphonostegia, and the monotypic Schwalbea, which is federally endangered. This basal clade is marked by the presence of two novel introns. A second, apparently independent gain of one of these introns marks a clade of largely European taxa. There is significant rate heterogeneity among PHYA sequences, and the presence of multiple PHYA in some taxa is consistent with observed ploidy levels.

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“…Buchnera is a tropical genus of hemiparasitic plants that comprises between 100 and 140 species, occurring especially in the Old World (Philcox 1965;The Plant List 2013). In the New World, 14 species were recognized by Philcox (1965), nine of which occurring in Brazil (BFG 2015).…”

Section: Buchnera Lmentioning

confidence: 99%

“…In the New World, 14 species were recognized by Philcox (1965), nine of which occurring in Brazil (BFG 2015). The recent discovery of two additional species brought this number to 11 (Souza & PaulaSouza 2016;Scatigna et al 2017).…”

Section: Buchnera Lmentioning

confidence: 99%

“…The recent discovery of two additional species brought this number to 11 (Souza & PaulaSouza 2016;Scatigna et al 2017). Buchnera is characterized as hemiparasitic herbs or sub-shrubs; with hipocrateriform corollas that are slightly zigomorphic, blue, lilac or pink, with erect to slightly curved tubes; and monothecous anthers (Philcox 1965;Souza & Giulietti 2009). Brazilian species of Buchnera are usually found in open wet areas of the Cerrado domain and other formations associated with quartzite outcrops (campos rupestres) and ironstone outcrops (cangas) (Souza & Giulietti 2009;Scatigna et al 2017).…”

Section: Buchnera Lmentioning

confidence: 99%

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Flora of the cangas of Serra dos Carajás, Pará, Brazil: Orobanchaceae

Scatigna

Mota

2017

Rodriguésia

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This is a taxonomic study of the representatives of Orobanchaceae from the cangas of Serra dos Carajás, Pará state, Brazil. We recorded Buchnera carajasensis and B. longifolia in Serra dos Carajás, but only the former occurs in areas of canga and will be treated in this work. Here we present a detailed description, photographs and notes on morphology, distribution and phenology of this species. Key words: Amazon, FLONA Carajás, hemiparasitism, Scrophulariaceae, taxonomy. ResumoEste é um estudo taxonômico dos representantes de Orobanchaceae das cangas da Serra dos Carajás, no estado do Pará, Brasil. Registramos Buchnera carajasensis e B. longifolia na Serra dos Carajás, mas apenas a primeira ocorre em áreas de canga e será tratada neste trabalho. Aqui apresentamos uma descrição detalhada, fotografias e comentários sobre morfologia, distribuição e fenologia desta espécie.

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Contributions to the Flora of Tropical America: LXXIV. Revision of the New World Species of Buchnera L. (Scrophulariaceae)

Cited by 10 publications

References 0 publications

Phylogenetic relationships within the tropical clade of Orobanchaceae

Phylogenetic relationships within the tropical clade of Orobanchaceae

Phylogeny of the parasitic plant family Orobanchaceae inferred from phytochrome A

Flora of the cangas of Serra dos Carajás, Pará, Brazil: Orobanchaceae

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