Monographs Details: Piptocarpha opaca subsp. piraparanaensis G.Lom.Sm.
Authority: Smith, Gerald L. & Coile, Nancy C. 2007. (Compositae: Vernonieae). Fl. Neotrop. Monogr. 99: 1--94. (Published by NYBG Press)
Family:Asteraceae
Description:Subspecies Description - Leaves with petioles furrowed, cinereous-tomentose 5-10 mm long; blades usually small 5-8.5 x 2-3 cm, with 4-7 lateral veins on each side. Inflorescences axillary, hemispheric clusters of 7-9 heads. Heads of 6-8 florets, subsessile; involucre turbinate 7.5 -8 x 3-4 mm.

Discussion:Subspecies piraparanäensis is distinguished from subsp. opaca by its smaller, oblong or elliptic leaves and smaller heads vs. the larger, ovate leaves and larger heads of subsp. opaca.
Distribution:Vaupés Colombia South America|