Tamarisk

Heb. 'eshel (Gen. 21:33; 1 Sam. 22:6; 31:13, in the R.V.; but in
A.V., "grove," "tree"); Arab. asal. Seven species of this tree
are found in Israel. It is a "very graceful tree, with long
feathery branches and tufts closely clad with the minutest of
leaves, and surmounted in spring with spikes of beautiful pink
blosoms, which seem to envelop the whole tree in one gauzy sheet
of colour" (Tristram's Nat. Hist.).