Along the ridges of the either pentamerous or hexamerous body, are bumps of meristematic tissue. Mesotarsus with 5 distinct tarsomeres (pentamerous). Eudicots with tetramerous or pentamerous petals may have rotational symmetry of order 4 or 5. The flowers are regular, pentamerous, and borne in racemes, corymbs, or umbels. When mature, echinoderms have a pentamerous radial symmetry. The small flowers are regular and trimerous to pentamerous. They are hermaphrodite, pentamerous and actinomorphic, accompanied with scaly silver bracts bigger that themselves. Both types are actinomorphic and pentamerous, with five petals. Flowers are fragrant, sessile, pentamerous and are arranged in dense axillary spikes. Because of "Arkarua"'s pentamerous symmetry, it is tentatively placed within phylum Echinodermata. The flowers are arranged in cymes, and each is pentamerous. The pentamerous radial symmetry can also be seen in their five ambulacral canals. The flowers are nearly perfectly pentamerous, with five petals, sepals, and stamens. Like other echinoderms, comatulids have pentamerous symmetry as adults though the larvae have bilateral symmetry. The flowers are regular, pentamerous, and appear on yellow-green corymbs and are quite small.