The plants that her image begins to appear through are all versions of the Hellebore. I had been thinking of the hellebore because of its legendary ability to cure insanity--thus, it formed a symbolic curtain between this world, filled with insanity, and the world of the magic garden, where one could suddenly and naturally be cured of it, and filled with magical abilities as a result...
The idea was for there to be a certain location in a garden where, at a certain hour of the night, one could pass into an otherwise invisible garden, where certain plants grew that one had to have special knowledge to use. The hellebore is one of those plants.
In 'A Contemplation Upon Flowers: Garden Plants in Myth and Literature,' by Bobby J. Ward, it says:
“...the black hellebore, presumably Helleborus niger, was supposedly favored by witches who used it in their charms because they believed that one ‘finger’ of its lobed leaves was evil. According to legend, only a witch knows which one!....
Traditionally, even the collecting of black hellebores was considered dangerous because of their connection to witchcraft and sorcery. It had to be done in a specific, prescribed way; Pliny instructed drawing a circle around the plant with a sword and while lifting the root saying certain spells or prayers, entreating permission from the gods. The mystic rites for collecting, according to some versions, suggest looking to the east to be sure that no eagle witnesses the process; if it does, the gatherer will waste away and die within a year.”
Legend has it that the Black Hellebore (so named for the color of its root) successfully cured many famous cases of insanity, including that of Heracles, and that of the daughters of Argos, who had been driven completely wild by Dionysus.
Its use throughout history went in and out of fashion, because of the dangers caused by using it carelessly--whereby it became a poison (Hellebore is the ancient Greek word for food that kills).
In 'The Anatomy of Melancholy,' it says “They that were sound commonly took it to quicken their wits, (as Ennius of old, Qui non nisi potus ad arma--prosiluit dicenda, and as our poets drink sack to improve their inventions)...” but later it began to be rejected as a poison; for example “Constantine the emperour in his Geoponicks, attributes no other virtue to it, than to kill mice and rats, flies and mouldwarps...” Later, it was picked up again as a medicine, and those that use it say it only has to be prepared correctly to work as a medicine: Brassivola “brags that he was the first that restored it again to its use, and tells a story how he cured one Melatasta, a madman, that was thought to be possessed, in the Duke of Ferrara’s court, with one purge of black hellebore in substance: the receipt is there to be seen; his excrements were like ink, he perfectly healed at once...” Some used a linen dipped in a warm concoction of hellebore and placed on the forehead to cure melancholy, some put it in an inhalant or a perfume.
And Paracelsus told us, “It is most certain...that the virtue of this herb is great, and admirable in effect, and little differing from balm itself; and he that knows well how to make use of it, hath more art than all their books contain, or all the doctors in Germany can show.”
The large bloom at the bottom left is from the type of Hellebore called the Christmas Rose, because it blooms as early as December. Its delicate scent and large, lovely petals bloom heartily even in the snow. We were imagining these winter blooms appearing in a corner of a larger garden at a secret hour of the night, their dew-strengthened scent opening the curtain between worlds, and the girl shimmering out of one and into the other.