Scofield : DICTYOPHORA RAVENELII BURT. 533 
The volva having been so tightly compressed before rupturing, 
has its two layers so close together that they might readily be 
mistaken for one, and the detailed structure is hard to recog- 
nize. The outer layer is hardened and the interstices between 
the hyphz are filled with gummy material. The inner layer 
has its hyphe lying for the most part in the direction of the re- 
cent strain and connects by a thin layer with the indusium. 
The stipe is made up of several rows of irregular chambers 
as shown in Fig. 13 in cross section. Some of these chambers 
open to the outside, but none of them to the middle of the stipe. 
The chamber walls, one of which is shown in detail in Fig. 17, 
are made up of much distended hyphze which look in section 
like the parenchymatous cells of higher plants. The chambers 
contain filmy remnants of disorganized tissue. The remnant of 
the tissue in the hollow of the stipe X, hangs usually from the 
apex of the stipe or some of it may remain attached at the base. 
The chambers of the stipe walls become smaller toward either 
end and at the apex the wall passes into the recurved collar 
where the contents of the chambers, though somewhat disor- 
ganized, are not absorbed. 
The indusium which has been the cause of the trouble in 
classification is hardly to be considered the true indusium com- 
mon to the genuine members of the genus Dzctyophora. It is 
not a definitely organized structure, but rather the remnant of a 
portion of the tissues of the periphery of the young sporophore 
caught between the pileus and the base. Penzig* in describing 
Ithyphatlus tenuis, speaks as follows: ‘‘ Eine andere bemerken- 
swerthe Erscheinung bei /thypallus tenuzs ist das Auftreten 
einer Art von Indusium zwischen dem Hute und dem oberen 
Theile des Stieles. Auch Ed. Fischer (l. c., p. 22) kurz die 
Andesenheit einer Haut, welche er als ‘ Rest der stiel und Hute 
trennenden Primordialgewedes’ auffast. Dieses Gedielde ist 
nicht in allen Individuen gleich ausgedildet: einmal nur als 
ausserest, feines, durchsichtiges Hautchen, andere Male aber als 
zienlich derbe, compacte membran, welche den Stiel kragen- 
artig oder fast glockenformig umgiebt. Ihere structur ist nicht 
pseudoparenchymatisch ; vielmehr ist sie aus eng verflochtenen, 
cylindrischen Hyphen zusammengesetz.” 
Burtt in describing this plant writes: ‘* This species has been 
*Ann. Jard. Bot. de Buitenzorg, 2d Ser. Vol. I., part 2. 
t Bot. Gaz. 22. 1806. 
