Two new Peruvian species of Cybianthus Martius (Myrsinaceae), C. tayoensis Pipoly & Ricketson, of subgenus Cybianthus, from Amazonas, and C. candamoensis Pipoly & Ricketson, of subgenus Weigeltia A. DC., from Puno, are described and illustrated. Cybianthus tayoensis may be recognized by its terete branchlets; leaf blades 6–7 cm wide with adaxial surface showing prominulous secondary veins; and reddish flowers with calyx 1–1.2 mm long, widely ovate lobes, and entire margins. Cybianthus candamoensis is easily recognized by its chartaceous, elliptic leaf blades with acuminate apices; petioles 2–2.5 cm long; staminate flower pedicels 1–1.2 mm long; and calyx unequally divided, lobes deltate to subdeltate or widely ovate, 0.7–1 × 0.7–1.2 mm, margins irregular to somewhat erose apically, corolla lobes 1–1.5 × 1–1.3 mm, with margins entire. Formal conservation assessments are reported for each.
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Vol. 16 • No. 2