Key for Piperaceae

1Herbs, usually epiphytic or on rocks, occasionally terrestrial; nodes not thickened; leaves succulent, fleshy; stigma 1; floral bracts round-peltate, glabrous
1'Herbs, subshrubs, shrubs or treelets, occasionally scandent, trailing, or lianas, terrestrial; nodes thickened; leaves not fleshy; stigmas (2-)3-4; floral bracts various, glabrous or pilose, often marginally fringed