Members of the cactus family are keystone species of arid and semiarid biomes in the
Americas, as they provide shelter and resources to support other members of ecosystems …

Tissue succulence in plants involves the storage of water in one or more organs or tissues to
assist in maintaining water potentials on daily or seasonal time scales. This drought …

Succulent plants are widely distributed, reaching their highest diversity in arid and semi‐arid
regions. Their origin and diversification is thought to be associated with a global expansion …

Savannas first began to spread across Africa during the Miocene. A major hypothesis for
explaining this vegetation change is the increase in C4 grasses, promoting fire. We …

Sub-Saharan Africa includes some 45,000 plant species. The spatial patterns of this
diversity have been well explored. We can group the species into a set of biogeographical …

Reconstructing phylogenetic relationships at the micro‐and macroevoutionary levels within
the same tree is problematic because of the need to use different data types and analytical …

The leafy spurges, Euphorbia subg. Esula, make up one of four main lineages in Euphorbia.
The subgenus comprises about 480 species, most of which are annual or perennial herbs …

The mid-Cenozoic decline of atmospheric CO2 levels that promoted global climate change
was critical to shaping contemporary arid ecosystems. Within angiosperms, two CO2 …

Euphorbia subg. Chamaesyce contains around 600 species and includes the largest New
World radiation within the Old World–centered genus Euphorbia. It is one of the few plant …

Euphorbia subg. Euphorbia is the largest and most diverse of four recently recognized
subgenera within Euphorbia and is distributed across the tropics and subtropics …