 "Lammas leaves" or "Lammas growth" refers to a second crop of leaves produced in high summer by some species of trees in temperate countries to replace those lost to insect damage.They often differ slightly in shape, texture and/or hairiness from the earlier leaves.A low-impact development project at Tir y Gafel, Glandwr, Pembrokeshire, Lammas Ecovillage, is a collective initiative for nine self-built homes.