420 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



12. Endoderma ventriciilosum nov. spec. 



Endoderma endophyticum in membranis hospitis {Chrysij- 

 meniæ Agardhii) maciüas largas formans; thallus e filamentis 

 articulatis, longis, irregulariter subdistiche ramosis, undulatis 

 compositus; rami angulo fere recto e filo materno oriuntur. 



Cellulæ longæ, subcylindricæ, crassitudine variabili, in parte 

 media inflatæ, 4 — 20 yt latæ, sæpe 70 n longæ, chiromatophorum 

 parietalem, pyrenoideis instructum continentes. Sporangia non visa. 



In the thick peripheral 

 membrane of Chrysymenia 

 Agardhii an endophytic, 

 widely spreading plant (Fig. 

 401) of a very characteristic 

 appearance was found, form- 

 ing patches of great ex- 

 tensions in the host plant. 

 This plant I think referable 

 to the genus Endoderma as 

 a new species. 



In dried material the 

 Endoderma was easily recog- 

 nizable owing to its green 

 coloured chromatophores, 

 filling out the whole cell 

 homogenuously. And, as to 

 material preserved in alco- 

 hol, the plant in this case, 

 too, when put into water 

 and Iodine, was easily recognizable, the whole contents of the cells 

 being coloured nearly black on account of the starch contained 

 in the cells. 



The plant consists of long cells of very irregular shape form- 

 ing together highly ramified filaments. The apical cells are sub- 

 cylindrical with obtuse summits and more or less undulated walls, 

 but soon the cells swell in the middle, this swelhng occu- 

 pying nearly a third part of their whole length. Because of these 

 swellings and, on the whole because of the very varying diameter 

 of the cells, these being now thinner, now thicker and the undu- 



Fig. 401. Endoderma ventriculosum nov. 

 spec, a, plant seen from above, b, trans- 

 verse section through the host-plant with 

 the endophyte, (a. about 150:1, b, 200:1.) 



