If you were to travel back in time 100 million years to look for your Christmas tree, you would find firs nearly identical to the ones sold today. New research shows that the genome of conifers — a ...

Journal of Paleontology, Vol. 90, No. 4 (2016), pp. 640-662 (23 pages) Angiosperms first appeared in the fossil record as pollen during the Valanginian–Hauterivian; they spread out of the tropics in ...

A study examining time-calibrated phylogenies and fossil records finds that the decline of conifers that was initiated in the Cretaceous Period is best explained by the rise of flowering plants and ...

Summary The secondary xylem of conifers is composed mainly of tracheids that differ anatomically and chemically from angiosperm xylem cells. There is currently no high-spatial-resolution data ...

ARGUABLY the world’s weirdest plant, Welwitschia mirabilis is a tangled mass of shredded, fraying leaves in the Namib desert. For a thousand years, perhaps more, it grows just two long leaves, which ...