Underneath the abdominal fold is a dense mass of buffy-white scented cottony pubescence. Its colonies are fluffy and cottony in appearance. The masses, known as ovisacs, are covered in fluffy, cottony layers of wax filaments. Initially stuffed with a cottony pith, the stipe eventually becomes hollow. The stem is dusted with rusty orange spores and has a cottony scanty partial veil. The kapok tree has cottony threads to catch the breeze. Each capsule contains many minute seeds with long, white, cottony hairs. Initially filled with a cottony pith, the stem becomes hollow in maturity. Like other species in its genus, "Fusarium solani" produces colonies that are white and cottony. The nymphs often form large cottony masses on twigs, for protection from predators. The cottony hairs on the stem have been occasionally collected to stuff pillows. The "fur" on early-stage larvae is sometimes extremely curly, giving them a cottony, puffed-up look. The fibre is "cottony", not glossy like mulberry silk. The cottony maple leaf scale, "Pulvinaria acericola", occurs on the foliage of "Acer negundo". The newly hatched nymphs are cottony white, and turn purple brown within an hour.