They gave themselves up to the spell and fell fast asleep at the foot of the great grey willow.

Salix atrocinerea, commonly called grey willow, is a species of willow.

The grey willow lives in freshly disturbed land, with preference for acidic soil, but this is a very hardy species and is even found on beaches near the sea and on islands.

Salix glauca is a species of flowering plant in the willow family known by the common names gray willow, gray-leaf willow, white willow, and glaucous willow.

Conservation measures taken to maintain or improve biodiversity include controlling weeds, particularly grey willow, aquatic grasses, yellow flag iris, alligator weed and gorse, and mammalian pests, including mustelids, rodents, cats and possum.

Salix cinerea (grey willow; also occasionally grey sallow) is a species of willow native to Europe and western Asia.

Common names include beaked willow, long-beaked willow, gray willow, and Bebb's willow.

There is also a variety of other trees which include willow, grey and black alder, poplars, hornbeam, oriental hornbeam, downy oak, lime, sessile oak, beech, acacia, birch, plane (sycamore), osier, etc.

Fear no grey willow!

It's either webwillow or gray willow or grease willow or some other kind.