Bog Cotton (Eriophorum angustifolium) is the chosen nickname of this attention-grabbing seedhead found at the Volo Bog, north of Chicago. It’s more common name is Common Cottongrass or Common Cottonsedge. So I suppose, even though grasses, sedges and rushes are each unique in character, the “naming” rights are a matter of personal experience with the plant.

Today I share words from another WordPress sight I pleasantly discovered that succinctly states the differences between the three common marsh plant types. The following descriptor refers to the stem qualities:

• “Sedges have edges, rushes are round and grasses have nodes where leaves are found.”

From https://meathecotours.wordpress.com/2014/06/10/the-bog-cotton-is-high/