2/6 



FUNGI 



(infundibuliform, Fig. 528); umbonate, having a protubeis 

 ance at the apex (Fig. 527), etc ; 

 whether the margin is turned up 

 at the edge (revolute, Fig. 524), 

 or under (involute, Fig. 527). Look 

 at the under surface and examine 



393. The Gills, or laminae. — 

 Notice whether they are broad 

 or narrow, whether they extend 

 straight from stem to margin or 

 are rounded at the ends, or are 

 curved, 



528. — Chanterelle (Cantha- , , 



rellus cibarius), with infundi- LOOineu, 



buliform pileus and decurrent qj- lobed 

 gills. 



in any 

 way. Notice their attachment 

 to the stipe, whether free, not 

 touching it at all ; adnate, 

 attached squarely to the stem 

 at their anterior ends ; or decur- 

 rent, running down upon the 

 stem for a greater or less dis- 

 tance (Fig. 528). 



394. The Hymenium. — Cut 



a tangential section through one 

 side of the pileus and sketch 

 as it appears under the lens. 

 If a very thin cross section of 

 one of the gills is made and 

 placed under the microscope 

 it will appear as in Figure 529. 

 More highly magnified sections 

 are shown in Figures 530, 53 1- 

 The blade of the gill, called the 

 trama, is covered on both sides 

 by a membranous layer bearing 

 elongated club-shaped cells set 



529-331. — Sections of a gilled 

 mushroom : 529, through one side, 

 showing sections of the pendent 

 gills, g, g, (slightly magnified) ; 

 530, one of the gills more enlarged, 

 showing the central tissue of the 

 trama, tr, and the broad border 

 formed by the hymenium, h\ 331, 

 a small section of one side of a gill 

 very much enlarged, showing the 

 club-shaped basidia, b, b, standing 

 at right angles to the surface, bear- 

 ing each two small branches with 

 a spore, s, s, at the end. The 

 sterile paraphyses, p, are seen 

 mixed with the basidia. 



