30 FETCH : 



sporidiis triseptatis ellipticis, apicibus acutinsculis ; conidiis 

 minimis (No. 611). On fronds of Drynaria quercifolia. Very 

 lichenoid in appearance, covering the whole of the under-side 

 of the frond. Accompanied by multitudes of pallid minute 

 perithecia filled with oblong spores -0002 long." 



Massee, Grevillea, XXII., p. 16, re-described it under the 

 name of Gloniella Drynarisa B. & Br. He stated that there was 

 no evidence of any genetic affinity between the minute 

 perithecia and the Hysterium, and described the latter as 

 " Gregarious, covering the entire under-surface of the frond ; 

 perithecia immersed, causing no discolouration, the sHghtly 

 raised and ruptured cuticle resembling white lips," &c. 



The fungus occurs on the scale leaves of the fern. These 

 leaves are persistent, and remain attached to the rhizome, 

 brown and dry, for a long time. In this condition they 

 frequently become covered with lichens on the outer (under) 

 surface, and this has occurred in the case of the specimens in 

 Thwaites 611. The whole of the under-surface is covered 

 with a thin lichen crust, greenish-gray, bearing minute cups ; 

 this crust contains alga cells and numerous crystalloid bodies. 

 The epidermis of the host plant is not visible, and the 

 white lips are merely the edges of the lichen covering. No 

 discolouration is evident in the lichen, but the whole of the 

 leaf is brown throughout. 



The fungus, however, does not appear to be part of the 

 lichen. The perithecia are entirely embedded in the tissue 

 of the host plant, and all the cells of the latter are permeated 

 with hyaline mycelium. Their presence is indicated by the 

 cracking of the epidermis, and consequently of the lichen, in 

 straight, curved, or branched lines, 1-2 mm. long. In section 

 the perithecia are broadly concave, up to 0-5 mm. diameter, 

 or deeply concave, about three-quarters of a circle, 0*2-0 -4 

 mm. diameter. The perithecial wall is red-brown, about 

 0-2 mm. thick. The asci are cylindric, eight-spored, the 

 spores obliquely uniseriate or sometimes transverse, 72-96 X 

 10-12 f^. The paraphyses are linear, branched, and fusing 

 above. The spores are oval, with rounded ends, three- 

 septate, not, or sHghtly, constricted at the septa, 10-12 X 

 5-7 \).. Massee 's spore measurement was 14-16 X 6 ^i,. 



