Leaf structures: A Leaf displaying two consecutive bifurcation angles, the second angle is larger than the first, sample 30, Ronchamp B Stomatal furrows as pronounced protrusions on the adaxial side of the leaf surface, note several thin striae between the furrows, sample 220 Mt Pelé C Stomatal furrows as pronounced depressions on the abaxial side of the leaf surface, note the midvein depression, sample 225 Mt Pelé D Venation in a Dicranophyllum gallicum leaf, note the trajectory of the midvein from the inner edge of the second leaf segment, gradually back to the centre position before the second bifurcation, sample 157, Mt Pelé.