Partial veil

Various adjectives are commonly used to describe the texture of partial veils, such as: membranous, like a membrane; cottony, where the veil tissue is made of separate fibers that may be easily separated like a cotton ball; fibrillose, composed of thin strands and glutinous, with a slimy consistency.Occasionally, the partial veil adheres to the edge of the cap as shreds of tissue, forming an appendiculate margin.[6] Mycologists Alexander H. Smith and Harry D. Thiers, in their 1964 monograph on the bolete genus Suillus, proposed the term "false veil" to account for those species of Suillus that have a "conspicuous cottony roll" of tissue that originates from the cap margin (especially in young specimens) and never becomes integrated with the stem tissue.[8] In the early 20th century, American mycologist George Francis Atkinson investigated the development of the mushroom Agaricus arvensis by collecting young mushroom buttons (immature fruit bodies with the veil intact and the cap not yet expanded) and observing their growth in the laboratory.The lower portion of the partial veil (connected to the stem) has a looser texture, and is relatively porous to allow for air exchange.