Behind the stillness of desert landscapes, cacti appear to be changing in unexpected ways. The cactus on your windowsill may ...

Scientists discover that fast-changing cactus flowers, not size or pollinators, are behind the rapid evolution of new cactus species.

A member of the aster and sunflower family found in Isle Royale National Park is one of the world's newest-described flower species. Small with delicate yellow blades, Packera insulae-regalis -- Latin ...

Sometimes newfound flower species are lurking where scientists least expect to see them — in parks, gardens and even in planters on balconies. That's where researchers in Japan recently identified a ...