Stipe (mycology) Stipe (mycology) In mycology, a stipe () is the stem or stalk-like feature supporting the cap of a mushroom. Like all tissues of the mushroom other than the hymenium, the stipe is composed of sterile hyphal tissue. In many instances, however, the fertile hymenium extends down the stipe some distance. Fungi that have stipes are said to be stipitate. The evolutionary benefit of a stipe is generally considered to be in mediating spore dispersal. An elevated mushroom will more easily release its spores into wind currents or onto passing animals. Nevertheless, many mushrooms do not have stipes, including cup fungi,
Amyloid (mycology) of the reagent is applied. Negative reactions, called inamyloid or nonamyloid reactions are for structures that remain pale brown or clear. A reaction producing a deep reddish to reddish-brown staining is termed either a pseudoamyloid reaction or a dextrinoid reaction. Amyloid (mycology) In mycology a tissue or feature is said to be amyloid if it has a positive amyloid reaction when subjected to a crude chemical test using iodine in either Melzer's reagent or Lugol's solution, producing a black to blue-black staining. The term "amyloid" is derived from the Latin "amyloideus" ("starch-like"). It refers to the fact that starch gives