 The Amylostereaceae possess a <unk> <unk> , meaning that there are in its mycelia two kinds of hyphae . The first type is brownish skeletal hyphae , which provide stability to the fruit body . These hyphae run parallel to the bark and often have hairpin @-@ like turns , so that the loops form thick @-@ walled , <unk> @-@ like structures , the so @-@ called <unk> . The second type is <unk> hyphae . They are translucent ( hyaline ) and serve to promote the growth of the fungus . Genuine cystidia arise in the hymenium and the layer directly below , the <unk> . Both <unk> and cystidia are encrusted , meaning that they feature crystal @-@ like structures on the top . 
