the world > plants > part of plant > (defined by) distribution, arrangement, or position > [adjective] > clustered, crowded, or growing in tufts (5)
Growing in thick tufts or clumps, turfy.
Compactly clustered, having the form of a rounded mass or cluster. Chiefly Botany; also Anatomy (see quot. 1854).
In the names of various species of plants that produce their flowers or fruit in clusters.