Slender shrub, usually 1-1.5 (2) m tall; stems slender; plants pubescent, the stems, petioles, and midrib below with conspicuous trichomes to ca 2 mm or more long and appearing jointed. Petioles short near apex of plant, 4-5 mm long, grading to 2.5 cm long near base; blades lanceolate-elliptic to ovate-elliptic, sharply long-acuminate, moderately to prominently inequilateral and rounded to subcordate at base, 9-12 cm long, 3-7 cm wide, thin, lacking glandular dots, with long slender trichomes on the lower surface and with both long slender and scabrous trichomes on upper surface, the major lateral veins in 3-5 pairs, in basal half of blade. Spikes unknown. Croat 11282. The species is very similar to P. pseudo-garagaranum, and additional material may prove them inseparable. However, P. viridicaule differs in its longer petioles, its lack of glandular dots, and its prominently scabrous upper blade surface.