It often helps considerably when identifying fungi to be able to identify the host species of that fungus. Identifying trees when their leaves are out is one thing, but many fungi are of course found when the leaves have been shed. Hence identifying trees by their twigs and buds becomes important. This on-line key (once it is ready) will help you identify the common native trees in Northern Ireland.

1. Buds Opposite 2. Buds Alternate
