Untersuchungen an den Leitbündelsystemen der Alismataceenblätter als Beitrag zur Kenntnis der Bedingtheit und der Leistungen der Leitbündelverbindungen

Meyer, Friedrich Johann Lorenz

doi:10.1007/bf01914015

Cited by 6 publications

(6 citation statements)

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“…These authors note that the species Heleophyton helobioides Erwin and Stockey had five series of vascular bundles placed concentrically, very similar to those described by Meyer (1932Meyer ( , 1935 for Echinodorus macrophyllus (Kunth) Micheli. H. helobioides, however, demonstrated a larger number of vascular bundles for each series.…”

Section: Introductionmentioning

confidence: 68%

“…The more internal vascular bundles in the petioles of E. glandulosus and E. pubescens, and the semicircular forms seen in E. palaefolius, are arranged in five series or arcs, and are similar to those seen in E. macrophyllus (Kunth) Micheli and in Sagittaria montevidensis Chamisso and Schlechtendal by Meyer (1932Meyer ( , 1935. There are a larger numbers of vascular bundles in the arcs and in the abaxial series of E. glandulosus and E. palaefolius than are seen in E. pubescens, E. macrophyllus and S. montevidensis.The vascular bundles in the petioles of Echinodorus are characteristically arranged in arcs, similar to their placement in Hydrocharitaceae (Ancibor, 1979), but differ from that seen in other aquatic plants such as Nymphaeaceae (Conard, 1905) and Hydrostachyaceae (Ja¨ger-Zu¨rn, 1998) where they are disposed in a circular pattern.…”

Section: Article In Pressmentioning

confidence: 85%

“…As such, the limits between these two species are certainly not well defined (and it must be decided if, in fact, species status is appropriate, or if other infra-specific categories may be applicable). Meyer (1932Meyer ( , 1935 was the first to use the arrangement of the vascular bundles in series in taxonomic studies of representatives of the family Alismataceae. Later, this same characteristic was used to classify the fossil species Heleophyton helobiaeoides Erwin and Stockey (1989).…”

Section: Article In Pressmentioning

confidence: 99%

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Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

Matias

Soares

Scatena

2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Introductionmentioning

confidence: 68%

Section: Article In Pressmentioning

confidence: 85%

Section: Article In Pressmentioning

confidence: 99%

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Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

Matias

Soares

Scatena

2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…ex Engelm. (Meyer 1932(Meyer , 1935). Individual vascular bundles are most similar to those described for Butomus L. (Cheadle and Uhl 1948), with a protoxylem lacuna that is surrounded by a ring of cells with a thickened inner wall, thin-walled xylem with annular, helical-to-scalariform secondary wall thickenings, and a well-developed phloem strand (Fig.…”

Section: Alismatalesmentioning

confidence: 99%

The Fossil Record of Basal Monocots

Stockey¹

2006

aliso

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The fossil record of basal monocots (Acorales and Alismatales) extends back to the Cretaceous in the Northern Hemisphere. While many fossils were originally assigned to these basal groups, rigorous paleobotanical studies show many of them to be misidentified. Acarus fossils have been reliably reported from the Eocene while those of Alismatales extend back to the early Cretaceous. The fossil record of basal monocots is usually represented by leaves, fruits, and seeds; however, some localities preserve stems with attached leaves and roots and even whole plants. A detailed examination of leaf venation patterns in alismatids has recently allowed the description of a new taxon from the Upper Cretaceous of Alberta based on leaves attributed to Limnocharitaceae. Anatomically preserved alismatid petioles (Heleophyton helobiaeoides) and well-preserved flowers/fruits are known from the Middle Eocene Princeton chert of British Columbia. A complete developmental sequence from flower to fruit is known, and this material has good possibilities for whole plant reconstruction. The extinct floating aquatic Limnobiophyllum (Araceae!Lemnoideae) and the genus Pistia have been the subject of morphological cladistic analyses and competing hypotheses of relationships among aroids and duckweeds. The fossil record and recent molecular studies support separate origins of Pistia and the duckweeds from within Araceae. The fossil taxon "Pistia" corrugata has been reexamined in light of new evidence and indicates the presence of a new genus that shows leaf morphology unlike that seen in extant Pistia, but with a similar growth habit. Fossil evidence indicates that the floating aquatic habit probably arose at least three times within Araceae.

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“…As an alternative hypothesis, the boreotropical flora (Wolfe, 1975) concept proposes that the lineages migrated from Europe to North America during the Eocene based on the accessibility of the North Atlantic and Bering land bridges. This idea is supported by the abundant fossil record of Alismataceae at high latitudes (e.g., Meyer, 1932, 1935; Erwin and Stockey, 1989; Golovneva, 1997; Stockey, 2006). Our present study of Nichima adds information about the Paleogene‐Neogene lineage history at low latitudes of North America.…”

Section: Discussionmentioning

confidence: 94%

Nichima gen. nov. (Alismataceae) based on reproductive structures from the Oligocene‐Miocene of Mexico

Hernández‐Sandoval,

Cevallos‐Ferriz,

Hernández‐Damián

2023

American J of Botany

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PremiseAlismataceae, a sub‐cosmopolitan family with ca. 17 genera and 113 species, is a large group of aquatic plants. Compression/impressions and bioinclusions of reproductive parts in amber support the documentation of the lineage in low‐latitude North America. In Mexico, fossil aquatic plants have been infrequently documented. The new reproductive structures exhibit characteristics of Alismataceae, whose fossil record is mainly documented in the northern hemisphere through of fruits and seeds.MethodsWe described and compared 150 samples of reproductive structures preserved as impressions/compressions from the Oligocene Los Ahuehuetes locality in the state of Puebla, and two bioinclusions from the Miocene amber of Simojovel de Allende in the state of Chiapas, Mexico with extinct and extant taxa. Using a parsimony analysis based on 29 floral characters of 17 extant genera of the Alismataceae, we evaluated the relationship between the fossil material and potential living relatives.ResultsWe discovered a new genus Nichima based on a perfect, actinomorphic flower with an expanded receptacle, three persistent sepals with multiple vasculatures, delicate and caducous petals, six stamens, and a gynoecium composed of three to more superior carpels, maturing into achenes. These characteristics resemble flowers of Alismataceae. Nichima represents an extinct member of the family, with two new species described here, Nichima magalloniae L. Hern., Cevallos‐Ferriz et Hernández‐Damián sp. nov. and Nichima gonzalez‐medranoi L. Hern., Cevallos‐Ferriz et Hernández‐Damián, sp. nov. Their phylogenetic position suggests affinity with a clade that includes Baldiella, Echinodorus, and Alisma.ConclusionsReproductive structures from the Cenozoic of Mexico support the identification of a new extinct genus, Nichima, evidencing the extensive history of Alismataceae in North America's low latitudes and suggesting a southern extension of the boreotropical flora.

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Untersuchungen an den Leitbündelsystemen der Alismataceenblätter als Beitrag zur Kenntnis der Bedingtheit und der Leistungen der Leitbündelverbindungen

Cited by 6 publications

References 4 publications

Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

Systematic consideration of petiole anatomy of species of Echinodorus Richard (Alismataceae) from north-eastern Brazil

The Fossil Record of Basal Monocots

Nichima gen. nov. (Alismataceae) based on reproductive structures from the Oligocene‐Miocene of Mexico

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