Dichotomous key
A. Plants with needle-like leaves; non-flowering plant…..………Plant 1 A1. Plants with needle-like leaves, broad leaves, or stemless; flowering plant B. Plants with white or yellow petals C. Plants with white petals…………………………………Plant 2 C1. Plants with yellow petals……………………………..Plant 3 B1. Plants with no petals……………………………………………Plant 4