Cyperus lupulinus (Great Plains flatsedge)

6/21/2010 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts · ≈ 11 × 7″ (27 × 18 cm) ID is uncertain

9/5/2016 · Nashua River Rail Trail, Groton Center, Groton, Massachusetts

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Liliopsida	Monocots (plants with a single seed leaf); includes the lily family
Subclass	Commelinidae	Dayflowers and spiderworts, and several others
Order	Cyperales	Flowering plants including grasses
Family	Cyperaceae	Sedge family
Genus	Cyperus	From an ancient Greek word meaning “sedge”
Species	lupulinus	From lupulus, ”the hop plant,“ apparently because the splikelets somewhat resemble hops