Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

There's a conundrum that has perplexed biologists since Charles Darwin himself. Why do some exotic species take off as invasive pests while others don't?

Global change is reshaping phenology and species ranges worldwide, altering the seasonal timing and species composition of floral communities. Using millions of herbarium and occurrence records for 2....

Using a large sample of herbarium records containing flowering-time data for 1,605 species of plants from the United States, the authors show that most changes in phenology in response to temperature ...

Using a large sample of herbarium records containing flowering-time data for 1,605 species of plants from the United States, the authors show that most changes in phenology in response to temperature ...

A fast-ticking evolutionary epigenetic clock in plants facilitates phylogenetic insights into the recent past.