The bract is a specialised leaf, usually at the base of a flower. Supra, the bracts are the narrow, lighter colored leaves. Now, in the linden, they are metatopic (not in the the usual place). In the linden they are also recaulescent (attached to the stem holding the flower). When the linden flowers, the flowers form in clusters; this is inflorescence.
Now, the linden is one plant. The linden is diverse in structure, and is an organism of beauty, and wonder in nature.
linden at dusk