pentamerous flowers.    From Wordnet, Princeton University. 

Hydradephaga; - ous: applied to aquatic, predatory pentamerous beetles with filiform antennae: see adephagous.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

Adephagous: belonging to the Adephaga: pentamerous, predatory, terrestrial beetles with filiform antennae and predatory habits: see hydradephagous.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

To take an example, the group Pseudostrobus, characterized by pentamerous leaf-fascicles, appears in many systems.    From Wordnik.com.  [The Genus Pinus] Reference

In the British Adoxa the uppermost flower generally has two calyx-lobes with the other organs tetramerous, whilst the surrounding flowers generally have three calyx-lobes with the other organs pentamerous.    From Wordnik.com.  [VII. Miscellaneous Objections to the Theory of Natural Selection] Reference

This species resembles P. Sabiniana in the length of its seed-wing and in the color of its cone, but is distinct in the short triangular umbo, in its pentamerous leaf-fascicles and in the mottled dorsal surface of its nut.    From Wordnik.com.  [The Genus Pinus] Reference

It is so common to observe on the same plant, flowers indifferently tetramerous, pentamerous, &c., that I need not give examples; but as numerical variations are comparatively rare when the parts are few, I may mention that, according to De Candolle, the flowers of Papaver bracteatum offer either two sepals with four petals (which is the common type with poppies), or three sepals with six petals.    From Wordnik.com.  [VII. Miscellaneous Objections to the Theory of Natural Selection] Reference

Diagram of regular pentamerous flower 4 2.    From Wordnik.com.  [Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants] Reference