- Figure 246.—Tricholoma, gills sinuate, stipe solid.
- Figure 247.—Panæolus papilionaceus, gills adnate.
- Figure 248.—Left-hand small plant, Hygrophorus, gills sinuate, adnexed. Right-hand plant Panæolus retirugis, gills ascending adnexed, veil appendiculate.
In certain genera the gills have special characteristics which may be noted here. Usually the edge of the lamellæ is acute or sharp like the blade of a knife, but in Cantharellus and Trogia the edges are very blunt or obtuse. In extreme forms the lamellæ are reduced to mere veins or ridges. Again, the edge is generally entire, i. e., not noticeably toothed, but in Lentinus it is often toothed or cut in various ways. In some other plants the edges are serrulate, crenulate, etc. In Schizophyllum alneum, a small whitish plant very common on dead sticks, the gills are split lengthwise along the edge with the halves revolute, i. e., rolled back. In Coprinus the gills and often a large part of the pileus melt at maturity into a dark, inky fluid.
Figure 249.—Section of portion of gill of Marasmius cohærens. t, trama of gill; sh, sub-hymenium; h, hymenium layer. The long, dark cells are brown cystidia, termed spicules by some to distinguish them from the colorless cystidia. The long cells bearing the oval spores are the basidia.
Figure 250.—Inocybe repanda (Bull.) Bres. (= Entoloma repandum Bull.). t, trama of pileus; sh, sub-hymenium; h, the hymenial layer; the long cells with a drop of moisture at the ends are cystidia (sing. cystidium).