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Universal hydraulics of the flowering plants: vessel diameter scales with stem length across angiosperm lineages, habits and climates.
Data from 257 species shows that vessels widen as predicted with distance from the stem apex across angiosperm orders, habits and habitats, leading to testable predictions regarding evolutionary strategies allowing plants to minimise carbon costs per unit leaf area even as height increases. Expand
Convergent Vessel Diameter–Stem Diameter Scaling across Five Clades of New and Old World Eudicots from Desert to Rain Forest
The results appear congruent with the notion that selection favoring cavitation resistance via narrow vessels should lead to shorter statures independently of ancestry or habitat, and with models suggesting that natural selection should maximize vessel conductivity while minimizing cavitation risk via vessel taper in the context of conductive path length. Expand
The diversity and evolution of pollination systems in large plant clades: Apocynaceae as a case study
This is the most extensive analysis of its type so far attempted and gives important insights into the diversity and evolution of pollination systems in large clades of angiosperms. Expand
To converge or not to converge in environmental space: testing for similar environments between analogous succulent plants of North America and Africa.
Although fine-scale differences between sites were found, a coarser perspective shows that these sites are clearly similar as drylands with relatively moderate drought and mild temperatures, illustrating how all studies of convergence must address the issue of how similar two entities must be before they are considered convergent. Expand
Population genetic analysis and bioclimatic modeling in Agave striata in the Chihuahuan Desert indicate higher genetic variation and lower differentiation in drier and more variable environments.
The detected association between genetic variation and environment variables indicates that climatic variables are playing an important role in the differentiation of A. striata. Expand
A new species of Tabernaemontana (Apocynaceae; Rauvolfioideae: Tabernaemontaneae) from Mexico.
The new species of Tabernaemontana riverae is endemic to Mexico and only observed in the states of Oaxaca, Tabasco, and Veracruz, highlighting Mexico as a diversity center for the genus. Expand
Ipomoea kahloiae (Convolvulaceae), a noteworthy new species endemic to Guerrero, Mexico
A new species of Ipomoea , I. kahloiae, is described and illustrated. It is endemic to tropical semideciduous forests in the Acahuizotla area of the Sierra Madre del Sur in Guerrero, Mexico.Expand
Systematics, distribution and conservation of Cascabela (Apocynaceae: Rauvolfioideae: Plumerieae) in Mexico
This work revised the taxonomy of Cascabela for Mexico and applied species distribution models and geographical information tools to evaluate chorological aspects of the six species occurring in Mexico and provide a conservation category. Expand
A new species of Cascabela (Apocynaceae; Rauvolfioideae, Plumerieae) from Michoacán, Mexico
A new species of Cascabela endemic to the Balsas Basin from Michoacan, Mexico is described and illustrated. Cascabela balsaensis can be separated from all known species of the genus because of itsExpand