Polygonaceae: Knotweed Family — Eriogonum (Buckwheat)
Flowers in this family do not have separate petals and sepals. For plants like this, the term “perianth” is used to describe the flower (i.e. the calyx and the corolla together) and “perianth parts” to describe the individual elements, whether or not they are distinguishable. Buckwheats are a very large and diverse group of plants, almost 40 different species found in Monterey and almost 120 species in California. Not surprisingly, identification can prove challenging. To identify them, the wide variety of leaves and growth habits can prove more helpful than the flowers, which are often similar. Beyond a certain point, a good botanical key is indispensable.