Ehretiaceae

Gottschling, Marc; Weigend, Maximilian; Hilger, Hartmut H.

doi:10.1007/978-3-319-28534-4_12

Cited by 8 publications

(13 citation statements)

References 54 publications

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“…Initially, this seemed surprising, since the climbing habit and presence of a bract is not included in the morphological circumscription of the family (Luebert et al 2016). However, in the more extensive treatment of Ehretiaceae by Gottschling et al (2016) (albeit with the inclusion of Cordiaceae and Hoplestigmataceae), it is reported that some species of Rochefortia Sw. and Bourreria P. Browne are also scandent or lianescent, and a bract is reported in Cortesia (Mirra et al 2022), here resolved as one of the possible sister genera to Keraunea (Fig. 2).…”

Section: Keraunea's Taxonomic Affinities In Ehretiaceaementioning

confidence: 99%

“…Ehretiaceae has been delimited in different ways since it was resurrected from synonymy within a widely defined Boraginaceae. In this paper we follow the delimitation of the familial classification of the Boraginales by the 20 members of the Boraginales Working Group which recognises 11 families (Luebert et al 2016) rather than that of Gottschling et al (2016) in which Cordiaceae and Hoplestigmataceae are included in Ehretiaceae.…”

Section: Introductionmentioning

confidence: 99%

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New to Ehretiaceae:Keraunea. Re-evaluation of a genus of climbers from Brazil

Cheek

Lombardi

Simões

et al. 2023

Preprint

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We definitively place Keraunea, a genus of showy forest climbers from remnants of the Mata Atlantica of Brazil, in Ehretiaceae. Previously Keraunea had been ascribed to Convolvulaceae based on morphology, or divided between Malpighiaceae and Ehretiaceae based on molecular analyses (polyphyletic). Keraunea is morphologically anomalous in the Ehretiaceae, having fruits which are held in the centre of a large wing-like bract by adnation of the pedicel, and due the stem-twining habit of some species. However, morphologically Keraunea shares two apomorphies with monotypic Cortesia Cav., halophytic shrubs of Argentina: 1) two parted endocarps (the fruit contains two endocarps each with two 1-seeded cells, while four 1-seeded endocarps are plesiomorphic in Ehretiaceae) and 2) a large bract that subtends the flower (absence of bracts is plesiomorphic in Ehretiaceae). A combined tree using four markers (ITS, trnL-F, rbcL and matK) places the three species of Keraunea sampled unambiguously in a clade with Ehretia + Cortesia + Halgania and monophyly for Keraunea is shown with high support. In an ITS tree Keraunea is sister to Cortesia with low support. We expand the generic description of Keraunea including the first account of the internal fruit structures and the seed, and present new data on the vegetative architecture including variation within the genus, some species being stem twiners while one species at least, is described as a scandent shrub. Keraunea lombardiana, previously included within K. brasiliensis, is formally described from Minas Gerais and Bahia as the third species of the genus and both these species are described. In all five species are recognised but two, known to us only from digital images, are not formally described because sufficiently detailed descriptions cannot be made. All five species are mapped, and provisional conservation assessments are recorded, of either Endangered or Critically Endangered. The state of Bahia, with three species, has the highest species diversity, mainly in dry forest. Three species appear confined to moist coastal forest, extending southwards from Bahia to the state of Rio de Janeiro. Keraunea remains incompletely known. Not one of the species has both anthetic flowers and fruits described. Studies on pollen, germination, anatomy, embryology and phytochemisty are entirely lacking. Field observations of pollination, seed dispersal and phenology are also required. However, the most urgent requirement is undoubtedly a formal taxonomic revision based on a full herbarium search and targeted fieldwork, with full IUCN 2012 extinction risk assessments for each taxon. This is urgent because it seems that all the taxa that we present in this paper (and more that can be expected to be found) appear to be highly range restricted and generally not to occur in protected areas, and so appear to be highly threatened.

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Section: Keraunea's Taxonomic Affinities In Ehretiaceaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New to Ehretiaceae:Keraunea. Re-evaluation of a genus of climbers from Brazil

Cheek

Lombardi

Simões

et al. 2023

Preprint

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“…En base a estos resultados, Nowicke y Miller (1990) reconocieron que Varronia debía ser considerada genéricamente distinta a Cordia. Hoy día, el género Varronia se considera un grupo monofilético (Gottschling et al, 2005;Miller y Gottschling, 2007), lo cual es sustentado por caracteres polínicos (Borhidi et al, 1988).…”

Section: Introductionunclassified

MORFOANATOMÍA FOLIAR COMO EVIDENCIA TAXONÓMICA EN LA DELIMITACIÓN DE LAS ESPECIES QUE FORMAN EL COMPLEJO Varronia bullata (CORDIACEAE)

2020

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El género neotropical Varronia P. Browne es uno de los más problemáticos, taxonómicamente, entre las Boraginales. Esto puede deberse a la frecuente superposición de los límites entre la variación intra e interespecífica de algunos caracteres. La finalidad de este trabajo fue explorar el potencial de los caracteres morfoanatómicos foliares para la delimitación de las especies que se encuentran dentro del complejo Varronia bullata en Panamá: Varronia inermis (Mill.) Borhidi, Varronia bullata L. y Varronia linnaei (Stearn) J.S. Mill. Para esto, se colectaron hojas maduras en diferentes poblaciones de cada especie. Se realizaron cortes transversales y se obtuvieron secciones superficiales de la lámina foliar, los cuales fueron utilizados para cuantificar y cualificar caracteres morfoanatómicos previamente seleccionados. La información cuantitativa fue sometida a un análisis canónico discriminante. Los resultados del análisis canónico discriminante mostraron que la densidad de los tricomas simples en la epidermis abaxial y la longitud de los tricomas simples en la epidermis adaxial, son los caracteres que presentan mayor influencia en la separación de las especies; por otro lado, a manera descriptiva se refleja que la presencia de sales cristalinas, el tipo de tricomas y la distribución de los estomas también contribuyen en la separación taxonómica de las especies.

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“…All species of Rochefortia develop thorns being a unique and therefore diagnostic character in Ehretiaceae (Gottschling et al 2014b, Gottschling et al 2016). Thorns in Rochefortia derivate either from bracts (when fasciculate leaves are developed in their axils) or from brachyblasts (i.e., short shoots; Urban 1908, Lefor 1968, Klotz 1979).…”

Section: Introductionmentioning

confidence: 99%

“…On a single herbarium specimen ( Lasser 758 : US!) determined as R. spinosa , two deciduous stipules are noted that are generally rare in Ehretiaceae (Gottschling et al 2016). …”

Section: Introductionmentioning

confidence: 99%

Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

Irimia¹,

Gottschling²

2016

BDJ

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BackgroundRochefortia is a small taxon of woody plants in the Ehretiaceae (Boraginales) exhibiting coriaceous leaves with cystoliths, small whitish flowers and drupaceous fruits containing four pyrenes. It shares the dioecious sex distribution with its sister group Lepidocordia and can be delimited from the latter (and all other Ehretiaceae) by the presence of thorns. Neotropical Rochefortia is distributed over most Caribbean islands, Central America and northern South America. Twenty-eight validly published names (corresponding to twenty-one typified taxa at the species level and below) are available in Rochefortia, but the precise number of species to be accepted has been elusive before this revision.New informationIn the course of the present revision, 353 herbarium collections, comprising approximately 540 Rochefortia specimens, were entried into a BRAHMS data base providing information about protologues and types and retrospective georeferences if possible. Based on the combination of molecular and morphological data we propose to recognise nine species of Rochefortia, namely R. acanthophora, R. bahamensis, R. barloventensis, R. cubensis, R. cuneata, R. lundellii, R. oblongata, R. spinosa and R. stellata (the remaining nineteen validly published names are synonymised under such names). Morphological description of each species and an identification key are provided.

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Ehretiaceae

Cited by 8 publications

References 54 publications

New to Ehretiaceae:Keraunea. Re-evaluation of a genus of climbers from Brazil

New to Ehretiaceae:Keraunea. Re-evaluation of a genus of climbers from Brazil

MORFOANATOMÍA FOLIAR COMO EVIDENCIA TAXONÓMICA EN LA DELIMITACIÓN DE LAS ESPECIES QUE FORMAN EL COMPLEJO Varronia bullata (CORDIACEAE)

Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

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