deergrass 
noun
A small sedge related to cotton grass, growing in tufts on wet moors and bogs.
- Trichophorum cespitosum (or Scirpus cespitosus), family Cyperaceae.
- Use a single clump of deergrass in the landscape as a specimen, or plant three or five together to create an accent grouping.
- Abe wears his signature field trip hat that he wove with juncus and deergrass.