Expelled by the Antarctic ice: Evolutionary history of the tribe Cunonieae (Cunoniaceae)
Fossil calibration reveals recent radiations and biogeographical history of the Cunonieae tribe. The most densely sampled phylogeny indicated Antarctica and Patagonia as areas of origin, confirming the reestablishment of Pterophylla and revealing the northward movement of Weinmannia into the tropical Andes.
Francisco Fajardo‐Gutiérrez +10 more
wiley +1 more source
Early Paleogene climate at mid latitude in South America: mineralogical and paleobotanical proxies from continental sequences in Golfo San Jorge basin (Patagonia, Argentina) [PDF]
The Paleocene-Eocene boundary was a period of transient and intense global warming that had a deep effect on middle and high latitude plant groups.
Brea, M. +3 more
core +5 more sources
ABSTRACT Climate warming increases the risk of harmful leaf temperatures in terrestrial plants, particularly in tropical tree species that have evolved in warm and thermally stable environments. We examined heat tolerance thresholds of photosynthetic light reactions in sun‐exposed leaves of 12 tropical montane tree species with different strategies for
Olivier Jean Leonce Manzi +13 more
wiley +1 more source
Una especie de Podocarpaceae, Podocarpus reiche, se registra para el estado de Hidalgo. Se incluye la descripción del género y la especie, datos de distribución geográfica y hábitat en el estado y se citan los ejemplares de herbario examinados.
Raúl Contreras-Medina +2 more
doaj
Estructura y regeneración de bosques de Prumnopitys andina en los Andes del sur de Chile
Prumnopitys andina (lleuque) es una especie de conífera con una distribución restringida en Chile y Argentina. A pesar de su importancia ecológica, los conocimientos sobre la estructura y dinámica de los bosques donde crece P. andina son limitados.
Rodrigo Vargas-Gaete +5 more
doaj
Morphology and tructure of the pollen cone and pollen grain of the Araucaria species from Argentina [PDF]
The pollen cone and the pollen grain of the two Argentinean species of Araucaria are described with LM, SEM and TEM. Primordia of pollen cones are formed in April and May and reach maturity by mid-October in A. angustifolia (Bert.) O.
Caccavari, Marta Alicia +2 more
core
A new species of Dammaroxylon Schultze-Motel, D. Natalense sp. nov. from the Cretaceous of Natal, South Africa [PDF]
Main articleIn the Cretaceous rocks of the M'hlosinga district, Zululand, Natal a new species of the form genus Dammaroxylon Schultze-Motel, D. natalense sp. nov., has been discovered.
Erasmus, T.
core
Spermatophyta Molecular Clock: Time Drift and Recent Acceleration
Exponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Soichi Osozawa
wiley +1 more source
Las Podocarpáceas de los bosques montanos del noroccidente peruano
Los bosques montanos del noroccidente peruano son formaciones vegetales que presentan una alta diversidad y endemismos. Lamentablemente, en muchos lugares están sujetos a procesos acelerados de deterioro por la deforestación y colonización, aspecto que ...
Edgar E. Vicuña-Miñano
doaj +1 more source
On tile anatomy of Dadoxylon arberi Seward with some remarks on the phylogenetical tendencies of its tracheid pits [PDF]
Main articleA well preserved specimen of Dadoxylon arberi Seward has been discovered in the Beaufort Series (Upper Karroo System) of the Empangeni district in Natal, South Africa.
Erasmus, T.
core

