in Thoreau’s Journal:

When I read of the catkins of the alder and the willow, etc., scattering their yellow pollen, they impress me as a vegetation which belongs to the earliest and most innocent dawn of nature; as if they must have preceded other trees in the order of creation, as they precede them annually in their blossoming and leafing. In the winter we so value the semblance of fruit that even the dry black female catkins of the alder are an interesting sight, not to mention, on shoots rising a foot or two above these, the red or mulberry male catkins, in little parcels, dangling at a less than right angle with the stems, and the short female ones at their bases. For how many aeons did the willow shed its yellow pollen annually before man was created!