I. penˈstēmən, ˈpen(t)stəm- noun
Usage: capitalized
Etymology: New Latin, from penta- + Greek stēmōn warp, thread — more at stamen
: a genus of chiefly American herbs or rarely shrubs (family Scrophulariaceae) having opposite or verticillate leaves and showy blue, purple, red, yellow, or white flowers, four perfect stamens, and one sterile stamen
II.
variant of pentstemon