Monocots and dicots. Those are words most of us haven't heard since high school biology days, if we even heard them at all. But now, a walk through the spring woods will thrust a common monocot ...

Sherwin Carlquist, Monocot Xylem Revisited: New Information, New Paradigms, Botanical Review, Vol. 78, No. 2 (1 June 2012), pp. 87-153 ...