a flexible slender twig or branch <a href=" http://www.merriam-webster.com/cgi-bin/mwwodarch.pl?04.08.2009">withy</a > Calyx A sepal (from Latin separatus "separate" + petalum "petal") is a part of the flower of angiosperms (flowering plants). Sepals in most flowers are green and lie under the more conspicuous petals . As a collective unit the sepals form