Chickweed has shallow, fibrous, fragile roots. It's easy to uproot accidentally, but will quickly recover if put back. The plant's weak stems mostly trail along the ground (for up to about sixteen inches), but the growing ends may be upright (up to eight inches high). The stems branch very frequently and take root at the leaf junctions. If you look very closely at the stems, you'll see a single line of hairs running up the side, and you'll notice that the line changes sides at each leaf junction. The leaves are opposite, smooth, and oval (with a point at the tip), and the older leaves are stalked, while the new leaves are not. Chickweed is just about always flowering, except in the dead of winter. It has tiny white flowers, about a quarter inch in diameter, in the leaf axils or in terminal clusters, with five deeply notched petals that look like ten, and five green sepals that are longer than the petals. The flowers close at night and open in the morning. They also close when it's about to rain. Possibly they respond to changes in air pressure. It does seem that the flowers don't open at all when a low-pressure system is lingering. Chickweed also reacts to nightfall by folding its leaves over the growing tip to protect it.
Wild Edible Plants: Chickweed (Stellaria Media .., http://blog.emergencyoutdoors.com/wild-edible-plants-chickweed-stellaria-media/ (accessed January 27, 2017).