Dryad

In classical Greek tradition the dryads (Greek Δρυάδες, Dryádes; singular Δρυάς, Dryás) are tree‑linked nymphs whose name derives from δρῦς (drys), meaning 'tree' and more specifically 'oak.' Certain subgroups appear in mythic genealogies: for example, the Meliae are ash‑tree nymphs whom Hesiod associates with the birth and early tending of Zeus (classical accounts cited in compilation sources). Hamadryads are portrayed in the classical corpus as nymphs ontologically bound to an individual tree so that the life of the nymph is tied to the life of that tree. Over time the English term 'dryad' has been used more broadly to denote tree nymphs in general, a semantic extension from its specifically oak‑linked Greek origin.

Classical summaries treat dryads as personified tree spirits rather than providing a single systematic physical portrait in surviving summary sources; the etymology and poetic uses imply a close identification with trees (often oak) and poetic literature addresses them with natural and arboreal epithets (e.g., Keats' figurative addressing of the nightingale as a 'light‑winged Dryad of the trees' in later literary reception). Modern and fantasy sources present a wide variety of visual depictions, but those later imaginative traits derive from literary adaptation rather than direct classical description in the supplied materials.

Sources report that dryads, as nymphs, were supernaturally long‑lived. The hamadryad subtype is explicitly described as being inextricably connected to a single tree: if that tree died, the hamadryad would die as well. Classical and summary sources also record a social‑religious function: dryads (together with the gods) punished mortals who harmed trees without first performing appropriate appeasement, indicating a role enforcing respect for trees. The provided materials do not supply a wider catalogue of supernatural powers (for example, specific shapeshifting, enchantment, or speech formulas) from classical texts; many such abilities in modern media are later accretions.