The spiral is the most ... The uncoiling fronds are an advance guard, heralding the botanical abundance of summer. The royal ferns, the tree fern, the polystichums — they are all at it.

The spiral-shaped fiddlehead of a sprouting fern is formed by the petiole, or leaf stalk, as it unfurls into a frond. As the leaf stalk grows, each pinna, or leaflet, at first appears as its own ...

The spiral-shaped fiddlehead of a sprouting fern is formed by the petiole, or leaf stalk, as it unfurls into a frond. As the leaf stalk grows, each pinna, or leaflet, at first appears as its own ...