Cupressaceae seedling juvenile leaves
The photo is showing a seedling of a Cupressaceae seedling with leaves of two different forms: single needles and scale formed leaves.
Single needles within species, genera or families of conifers, which do not usually carry single needles, are often called juvenile leaves, because the first leaves of the seedlings of all conifers are single needles, and when the seedling grows the single needles change to adult leaves if the adult leaves are different from single needles. Most adult taxa only have adult needles, but some taxa may have more or less marked dimorphism of the leaves even when they are grown up. See below: Dimorphism (Juniperus chinensis).