Floral anatomy of Neotropical species of Mayacaceae

Carvalho, Maria Luiza Silveira de; Nakamura, Adriana Tiemi; Sajo, Maria das Graças

doi:10.1016/j.flora.2008.02.003

Cited by 14 publications

(16 citation statements)

References 21 publications

(24 reference statements)

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“…This result makes sense in terms of morphological trait evolution because in Mayaca the three stamens are located opposite the outer tepals and hence represent the outer androecial whorl (e.g. Carvalho et al 2009;Oriani and Scatena 2012), in contrast with Xyridaceae and most Eriocaulaceae, in which only the inner androecial whorl is fertile, thus representing an entirely independent morphological transition in Mayacaceae. On the other hand, it remains equivocal whether the loss of a fertile outer androecial whorl occurred more than once during the evolutionary history of the xyrid clade (Fig.…”

Section: Loss Of An Entire Stamen Whorlmentioning

confidence: 97%

“…The style is typically hollow in monocots, including Eriocaulaceae (Rosa and Scatena 2007) and Mayacaceae (Venturelli and Bouman 1986;Carvalho et al 2009). In hollow styles, pollen tubes grow from the stigma to the ovary over the surface of the epidermis through a thin layer of mucilage (e.g.…”

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

“…antesepalous (e.g. Carvalho et al 2009;Ronse de Craene 2010;Oriani and Scatena 2012). Xyridaceae are currently circumscribed into two subfamilies: Xyridoideae, with a single widespread genus Xyris L. (ca 360 species), and Abolbodoideae, with four genera endemic to South America (Table 1).…”

Section: Introductionmentioning

confidence: 99%

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Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

et al. 2017

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We provide a detailed comparative study of floral ontogeny and vasculature in Xyridaceae, including Xyris, Abolboda and Orectanthe. We evaluate these data in the context of a recent well-resolved phylogenetic analysis of Poales to compare floral structures within the xyrid clade (Xyridaceae and Eriocaulaceae). Xyrids are relatively diverse in both flower structure and anatomy; many species incorporate diverse and unusual floral structures such as staminodes and stylar appendages. Xyridaceae possess three generally epipetalous stamens in a single whorl; the ''missing'' stamen whorl is either entirely absent or transformed into staminodes. Fertile stamens each receive a single vascular bundle diverged from the median petal bundle. In Xyris, the stamen bundle diverges at the flower base, but it diverges at upper flower levels in both Abolboda and Orectanthe. In species of Abolboda that possess staminodes, staminode vasculature is closely associated with the lateral vasculature of each petal. Despite the likely sister-group relationship between Eriocaulaceae and Xyridaceae, our character optimization indicates that the stylar appendages that characterize some Xyridaceae (except Xyris and Achlyphila) are non-homologous with those of some Eriocaulaceae. On the other hand, it remains equivocal whether the loss of a fertile outer androecial whorl occurred more than once during the evolutionary history of the xyrid clade; this transition occurred either once followed by a reversal to fertile stamens in Eriocauloideae and staminodes in some Xyridaceae, or twice independently within both Xyridaceae and Eriocaulaceae.

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Section: Loss Of An Entire Stamen Whorlmentioning

confidence: 97%

Section: Floral Anatomy In Xyridaceae 1303mentioning

confidence: 99%

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Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

et al. 2017

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“…A família Mayacaceae é composta por ervas perenes ou anuais, anfíbias ou aquáticas, que ocorrem geralmente em ambiente lacustres ou em formações brejosas (Carvalho 2007;Carvalho et al 2009;Carvalho & Machado 2015). Suas espécies são popularmente utilizadas na composição de aquários plantados, possuindo grande potencial ornamental (Suzuki 2011).…”

Section: Mayacaceaeunclassified

“…Suas espécies são popularmente utilizadas na composição de aquários plantados, possuindo grande potencial ornamental (Suzuki 2011). Apesar da família encontrar-se na ordem Poales, seu posicionamento dentro dela ainda é ambíguo, hora aparecendo como grupo irmão do clado Cyperoide (Lourteig 1952;APG 2009;Carvalho et al 2009;Carvalho & Machado 2015), hora dentro do clado Xyridoide (Chase et al 2000Bremer 2002;APG, 2003;Soltis et al 2005). A família é composta por apenas um gênero, Mayaca Aubl., representado por cinco espécies, das quais apenas M. blaumii Gürke não ocorre no Brasil (Pellegrini et al 2016;Govaerts 2016).…”

Section: Mayacaceaeunclassified

Flora das cangas da Serra dos Carajás, Pará, Brasil: Mayacaceae

Mota

Koch

2016

Rodriguésia

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ResumoMayacaceae é uma pequena família de monocotiledôneas composta apenas pelo gênero Mayaca, com cinco espécies. Na Serra dos Carajás são encontradas três das quatro espécies registradas para a América do Sul: Mayaca fluviatilis, M. kunthii e M. longipes. São apresentados neste estudo descrições, ilustrações e comentários morfológicos para estas espécies. Palavras-chave: FLONA Carajás, Pará, plantas aquáticas, taxonomia. AbstractMayacaceae is a small family of monocots composed by the only one genus Mayaca, with five species. In Serra dos Carajás, we found three of the four species recorded to South America: Mayaca fluviatilis, M. kunthii, and M. longipes. This study presents descriptions, illustrations, and morphological comments for these species.

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The taxonomic value of floral characters in Rapateaceae (Poales-Monocotyledons)

Oriani

Scatena

2012

Plant Syst Evol

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Floral anatomy of Neotropical species of Mayacaceae

Cited by 14 publications

References 21 publications

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

Floral ontogeny and vasculature in Xyridaceae, with particular reference to staminodes and stylar appendages

Flora das cangas da Serra dos Carajás, Pará, Brasil: Mayacaceae

The taxonomic value of floral characters in Rapateaceae (Poales-Monocotyledons)

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