Dogwood

As I photographed the dogwood I started to wonder why on earth it is called dogwood. Isn't blip great, not just taking photos but keeping on learning. 

'The name "dog-tree" entered the English vocabulary before 1548, becoming "dogwood" by 1614. Once the name dogwood was affixed to this kind of tree, it soon acquired a secondary name as the Hound's Tree, while the fruits came to be known as dogberries or houndberries (the latter a name also for the berries of black nightshade, alluding to Hecate's hounds). Another theory advances the view that "dogwood" was derived from the Old English dagwood,from the use of the slender stems of its very hard wood for making "dags" (daggers, skewers, and arrows). Another, earlier name of the dogwood in English is the whipple-tree. Geoffrey Chaucer uses "whippletree" in The Canterbury Tales ("The Knight's Tale", verse 2065) to refer to the dogwood. A whippletree is also an element of the traction of a horse-drawn cart, linking the drawpole of the cart to the harnesses of the horses in file; these items still bear the name of the tree from which they are commonly carved.'