Key to the Genera of Ericaceae in Rio Grande do Sul state, Brazil

1. Leaf blade with apical callous gland; ovary inferior; fruit drupoid (nuculanium) ........................................................... Gaylussacia

- Leaf blade without apical callous gland; ovary superior; fruit a capsule ...........................................................................................2

2. Leaf apex mucronulate, venation reticulodromous; anthers truncate, the filaments geniculate; fruiting calyces dry, obscure, the capsule naked.......................................................................................................................................................................... Agarista

- Leaf apex acute without mucro or callous gland, venation brochidodromous; anthers bifid, the filaments erect; fruiting calyces fleshy, surrounding the capsule .......................................................................................................................................... Gaultheria