Piper nokaidoyitau

Description. Shrub up to 3 m tall; internodes (2.5 -) 3 - 4.5 cm long, canaliculate superficially, green, glabrous. Prophylls 2.8 - 3.2 cm long, green, glabrous, caducous, swollen in the basal portion (observable in live plants). Petioles uniform in size along all nodes, (0.7 -) 1 - 1.2 (- 1.5) cm long, sheathing at the base, smooth, glabrous. Leaf-blades coriaceous, drying black, uniform in shape and size along all axes, (4.5 -) 5 - 8 x (18) 21 - 26 cm, ovate, asymmetric, base rounded, glabrous on both surfaces, eciliate; pinnately nerved throughout, 4 - 5 ascending nerves on each side, eucamptodromous, with spacing decreasing and angle increasing towards the base, tertiary veins random, reticulate; apex acuminate. Inflorescences simple spikes, erect; peduncle 1 - 1.5 cm long, glabrous, green; rachis (7.5) 10 - 12 x 0.3 cm in flower, 11 - 13 x 0.4 - 0.5 cm in fruit, flowers densely grouped along the rachis, forming bands around the spike. Floral bracts cucullate, heart-shaped from above, 0.2 - 0.35 x 0.4 - 0.7 mm, glabrous centrally on the abaxial surface, margin densely fimbriate. Flowers with three stamens, filaments 0.3 - 0.5 mm long, anthers 0.1 - 0.25 x 0.2 - 0.3 mm, transversally dehiscent, dithecous, with connective not protruding, glabrate, idioblasts not evident, colour black when dried; stigmas 3, 0.1 - 0.25 mm long, sessile. Fruits obpyriform in side view and triangular from above, green when alive, black when dry, 0.5 - 0.7 x 0.8 - 0.9 mm, glabrous, partially immersed in the rachis, with stigmas sessile and persistent.