Usually pertains to leaves. Not opposite each other but bourne singly at different levels on the stem.
Extending or running down on another structure, as a leaf on a stem or a tubercle on an achene.
Shaped like a spear head, broadest near base, tapering to apex, and several times as long as broad.
A tubular sheath present on the stem just above the base of the leaves of docks and smartweeds. It is…