Characters;"Pilea nicholasii";"Pilea hydrocotyliflora";"Pilea pichisana" "Leaf symmetry";asymmetrical;"± symmetrical";"symmetrical to asymmetrical" "Major lamina size";"7–9 × 1.4–3.2 cm";"4–8 × 1.5–2.5 cm";"2–2.8 × 1–1.3 cm" "Leaf base";"cuneate or less commonly truncate";subrounded;"rounded or subacute" "Leaf apex";"acute to shortly acuminate";"long acuminate";"acute or acuminate" "Foliar indument";pruinose;glabrous;glabrous "Foliar cystoliths";fusiform;fusiform;punctiform