Helleborine was originally brought to North America from Europe as a medicinal or some say as an ornamental plant. Now it has become naturalized and in some cases it is considered an invasive orchid (!). I never mind when one arises around the garden ;)
Helleborine grows from a short, thin but deep rhizome. The stems have clasping leaves and flowers are arranged in a terminal raceme (many stalked nodding flowers). Very variable in size and colour, from greenish-white to pink and brownish-purple; the exemplar in the image for example, has particularly large, nicely coloured flowers.
Germination: the very small seeds are its main way of spreading around, so probably the best method is to sprinkle them in the garden in the fall, in a part-shade, moist spot, preferably under trees.