A new species of Morella (Myricaceae) from Bolivia and Argentina

Morella chevalieri is described as new and is illustrated: it grows in the Andes in northern Argentina and southern and central Bolivia. A key that di fferentiates this new species from the monoecious Myrica pubescens is prese nted. The dioecious Morella chevalieri is characterized by the following: l eaf blade elliptic to narrowly elliptic, margin serrate (at least in the di stal 2/3); staminate flowers with one or no secondary bracts (if present, l inear or band-shaped) and secondary bracts in the pistillate flower 2-3 (se ldom 4).