These clusters give way to small triangular achenes, with one seed in each achene. The achenes become blackish, are smooth or short-bristly. The achenes are beaked and some species have feathery hairs attached to them. Types of dry fruits include achenes, capsules, follicles or nuts. These give rise to small oblong achenes. The achenes are grey, tipped with bristles. Four types of aggregate fruits include etaerios of achenes, follicles, drupelets, and berries. The achenes are compressed and narrowly winged. The fruit is a cluster of achenes covered with long hairs. The fruits produced are resinous achenes up to 1.5 millimeters long. These achenes or cypselas are roughly club-shaped but usually incurved and flattened. The woody vine bears fragrant white flowers and small green achenes. The fruit is a receptacle containing several glossy, pale brown achenes. The barbed spines of the achenes get stuck in the feathers, fur, fleeces, clothing, etc. After being pollinated, the female flowers become achenes that form an aggregate ball.