. The British Charophyta. Characeae. STBUCTUKE AND DEVELOPMENT. 39 desmacantha and Lamprothamnium papulosuvi. These bulbils are often 1 mm. or more in diameter and are found singly or in clusters of usually 2-4 (sometimes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Groves, James; Bullock-Webster, George Russell, 1858- joint author. London, The Ray society