Samara are winged seeds, and the wafer-like seed cases of elm trees are distinctive, as well as tenderly edible. They appear in mid-spring, with each seed wrapped neatly in a soft chartreuse ...

Prior research has shown that the first seeds evolved approximately 372 to 359 million years ago, during the Famennian stage—a development that arose from earlier spore-based reproduction. The ...

Winged thistle is a winter annual, which means it generally establishes from seed in autumn, grows as a typical thistle rosette over winter, then develops an upright flower stem in spring, from which ...