As one might expect, Dryads aren't always dry; the name is Greek in origin where drys means oak tree.
In Greek mythology, Hamadryads are dryads whose life force is tied to a particular tree. If the tree gets sick, its hamadryad gets sick. If the tree is hugged, the hamadryad feels it. If the tree dies, so does the hamadryad.
Hamadryad
You, Hour, are a lumberjack (in the modern era) in charge of surveying forested land for clear cutting. You've only had the job one week, perhaps taken out of desperation in a bad economy if this isn't your normal vocation.
The European forest you are presently surveying is quite old. Shortly before sunset the forest opens up into a small clearing that is dominated by a truly large English Oak tree. You pull out your tape measure and determine its trunk is just over 4.6 meters wide (15 feet), with a canopy about 24 meters across (80 feet). From your job training you figure this tree must be at least a thousand years old (2 baktuns, 10 katuns, 14 tuns, 10 uinals, and 2 kins on the Mayan Long Count calendar). The tree would've been just a sapling in the early 11th-century. Many vines stretch out across the grove's soil, wrapping around the tree's roots that spread out far away from the tree's trunk.
You hear her coming before you see her. You look to your left. She walks into the clearing, slender and graceful, and as tall as the English Oak tree is wide. She's tall enough for her upper torso to catch the rays of the sun over the treetops as it nears the horizon. She is naked, and pale skinned with blonde hair, long and braided. Little stems with leaves grow out of her skin, mostly covering her naughty bits.
She pauses at the edge of the clearing, looking you over calmly. Since you appear to carry no fire or axe, she is not frightened, but her furrowed eyebrows show concern.
Hamadryad (speaking in English with a thick Greek accent):What are you doing here?