Purpletop tridens (Triodia flava, formerly Tridens flavus), also known as greasegrass or tall redtop, is a clump-forming, warm-season grass with airy, reddish brown to deep purple panicles atop 4- to 6-foot-tall stems in mid- to late summer, and yellow fall color. It is an interesting addition to meadows, prairie-style plantings, and naturalistic gardens. (I’m not sure I’d advise it for a typical garden border because of its tendency to self-sow.) Purpletop tridens is a larval host for some butterfly species, including common wood nymph and several kinds of skippers. U.S. native (seed collected from my meadow in Bucks County, PA). Full sun. Perennial; Zones 5 to 9.
Collected in October 2020. At least 40 seeds.