Results 41 to 50 of about 2,206 (186)

Paisia, an Early Cretaceous eudicot angiosperm flower with pantoporate pollen from Portugal [PDF]

, 2018
A new fossil angiosperm, Paisia pantoporata, is described from the Early Cretaceous Catefica mesofossil flora, Portugal, based on coalified floral buds, flowers and isolated floral structures.
Argue CL, Blackmore S, Crane PR, Else Marie Friis, Emadzade K, Friis EM, Friis EM, Herngreen GFW, Kaj Raunsgaard Pedersen, Krassilov VA, Mário Miguel Mendes, Praglowski J, Rey J, Rey J, Samylina VA, Smit PG, Stampanoni M, Tatlidil S, Vakhrameev VA, Weston PH, Zbyszewski G   +20 more
core   +1 more source

The developmental basis of floral nectary diversity and evolution. [PDF]

New Phytol
Summary Nectar is a central bridge between angiosperms and animal mutualists. It is produced by specialized structures termed nectaries, which can be found on different plant organs. Consumption of floral nectar by pollinators and the subsequent transfer of pollen contribute to the reproductive success of both angiosperms and their pollinators.
Liao IT, Gong Y, Kramer EM, Nikolov LA.
europepmc   +2 more sources

Extrapolating demography with climate, proximity and phylogeny: approach with caution [PDF]

, 2016
Plant population responses are key to understanding the effects of threats such as climate change and invasions. However, we lack demographic data for most species, and the data we have are often geographically aggregated.
Buckley, Y.M., Coutts, S.R., Csergő, A.M., Salguero-Gómez, R.   +3 more
core   +4 more sources

First evidence of ranunculids in Early Cretaceous tropics

Scientific Reports, 2022
Early Cretaceous floras containing angiosperms were described from several geographic areas, nearly from the Arctic to the Antarctic, and are crucial to understand their evolution and radiation.
William Vieira Gobo, Lutz Kunzmann, Roberto Iannuzzi, Julien B. Bachelier, Clément Coiffard   +4 more
doaj   +1 more source

Consistent role of Quaternary climate change in shaping current plant functional diversity patterns across European plant orders [PDF]

, 2017
Current and historical environmental conditions are known to determine jointly contemporary species distributions and richness patterns. However, whether historical dynamics in species distributions and richness translate to functional diversity patterns
Ordonez, Alejandro, Svenning, Jens-Christian   +1 more
core   +1 more source

Taxonomic decomposition of the latitudinal gradient in species diversity of North American floras [PDF]

, 2017
Aim: To test the latitudinal gradient in plant species diversity for self-similarity across taxonomic scales and amongst taxa. Location: North America. Methods: We used species richness data from 245 local vascular plant floras to quantify the slope and ...
Enquist, BJ, Kaspari, M, Michaletz, S, Swenson, NG, Waide, RB, Weiser, MD, Zhou, J   +6 more
core   +1 more source

Breaking the limits - multichromosomal structure of an early eudicot Pulsatilla patens mitogenome reveals extensive RNA-editing, longest repeats and chloroplast derived regions among sequenced land plant mitogenomes

BMC Plant Biology, 2022
Background The mitogenomes of vascular plants are one of the most structurally diverse molecules. In the present study we characterize mitogenomes of a rare and endangered species Pulsatilla patens.
Kamil Szandar, Katarzyna Krawczyk, Kamil Myszczyński, Monika Ślipiko, Jakub Sawicki, Monika Szczecińska   +5 more
doaj   +1 more source

Morphology, Taxonomy, Anatomy, and Palynology of the Opium Poppy (Papaver somniferum L.) Cultivation in Northern Thailand

Plants, 2023
In this paper, we present the morphology, taxonomy, anatomy, and palynology of Papaver somniferum. A detailed morphological description and illustrations of the species are provided, along with information about the identification, distribution ...
Chatchai Ngernsaengsaruay, Nisa Leksungnoen, Pichet Chanton, Tushar Andriyas, Pratchaya Thaweekun, Surasak Rueansri, Ratthapon Tuntianupong, Woottichai Hauyluek   +7 more
doaj   +1 more source

Non-random Vessel Distribution in Woods: Patterns, Modes, Diversity, Correlations [PDF]

, 2009
Vessel grouping is a form of non-random distribution that becomes functionally valuable when the background consists of non-conductive imperforate tracheary elements (fiber-tracheids and libriform fibers); ungrouped vessels, randomly placed, often occur ...
Carlquist, Sherwin
core   +2 more sources

The contribution of embryogeny to the systematics of Polycarpi cae and Helobiae

Acta Societatis Botanicorum Poloniae, 2014
The study of embryogenesis in 27 genera of Polycarpicae and Helobiae allows to determine the embryological characters of these two taxa and determine their phylogenetic bonds by comparison with other morphologic criteria.
J. Guignard, Ly Thi Ba
doaj   +1 more source