Results 151 to 160 of about 1,241 (171)

Successive microsporogenesis in eudicots, with particular reference to Berberidaceae (Ranunculales) [PDF]

open access: possiblePlant Systematics and Evolution, 2008
The eudicot clade of angiosperms is characterised by simultaneous microsporogenesis and tricolpate pollen apertures. Successive microsporogenesis, where a distinct dyad stage occurs after the first meiotic division, is relatively rare in eudicots although it occurs in many early branching angiosperms including monocots.
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The morphology and anatomy ofHydrastis (Ranunculales): Systematic reevaluation of the genus

The Botanical Magazine Tokyo, 1985
Evidence from morphology and anatomy (including embryology), as well as from palynology, chemistry and cytology, indicates thatHydrastis is quite divergent from Ranunculaceae (in which the genus has been most often included) as well as from both Glaucidiaceae and Berberidaceae. Distinctive features ofHydrastis, which demarcate it from Ranunculaceae but
Hiroshi Tobe   +3 more
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Floral development of Kingdonia (Ranunculaceae s. l., Ranunculales)

Plant Systematics and Evolution, 2004
The flower of Kingdonia has a terminal position, thus the rhizome is sympodial. The floral organs initiate in spiral phyllotaxis. The androecium is centripetal in initiation but the sterile stamens are retarded in development compared with the fertile ones. The apex of the young carpel does not participate in the conduplication.
Yi Ren   +4 more
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Seed Shape Diversity in families of the Order Ranunculales

, 2019
Seed shape in the order Ranunculales is described with the objective of characterizing the morphological seed types in the families of this order and to establish a correlation between seed shape, plant structure and life style.         Based on previous
J. Martín-Gómez   +2 more
semanticscholar   +1 more source

Teixeiria lusitanica, a new fossil flower from the Early Cretaceous of Portugal with affinities to Ranunculales [PDF]

open access: possiblePlant Systematics and Evolution, 2005
A charcoalified fossil flower bud of a new genus and species (Teixeiria lusitanica) is described from the Early Cretaceous of Portugal. The flower is actinomorphic and unisexually male. At the base of the bud there are several bracts of different sizes, which are followed by sepal-like and petal-like tepals.
Von Balthazar, M.   +2 more
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Invasive Japanese Barberry, Berberis thunbergii (Ranunculales: Berberidaceae) Is Associated With Simplified Branch-Dwelling and Leaf-Litter Arthropod Communities in a New York Forest

Environmental Entomology, 2019
Arthropod food webs can be indirectly impacted by woody plant invasions, with cascading consequences for higher trophic levels.There are multiple bottom-up pathways by which invasive plants can alter food webs: aboveground interactions based on plant ...
R. Clark, Chad L Seewagen
semanticscholar   +1 more source

Resolving phylogenetic reconstruction in Menispermaceae (Ranunculales) using fossils and a novel statistical test

TAXON, 2007
Menispermaceae (Moonseed family) are an important family within the basal eudicots. This study is a first attempt to infer phylogenetic relationships within Menispermaceae, focusing on morphological data and using cladistic methodology. Sampling included genera from all the eight tribes usually recognized within the family, and was representative of ...
Jacques, F.M.B.   +3 more
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