ENDO.Sl'HAEKA. 



551 



to have an injurious effect on its host, beyond killing a few- 

 isolated leaves. 



End. rubra Sehroet. occurs in leaves of Mcntlici aqimfica and 

 Fcplis Portula. 



Phyllobium dimorphum Klel)S. Found in leaves of Lysi- 

 machia Nummularia, AjiKja rcptan>i, Chlora serotina, Erythraca 

 Centaurium. This endophyte may either penetrate into living 

 leaves and there go through its life-history, or it may do so 

 in dead leaves. The zygozoospores have only two cilia, and 

 enter the leaves chiefly through the stoniata of the lower 

 surface. Inside the leaf they form long filaments, which make 

 their way between the elements into the vascular bundles of 

 the leaf-ribs, and follow the course of the spiral vessels. 

 Kesting- spores are formed, and 

 give the veins of the leaf a 

 rosary -like appearance. Male 

 and female gametes are pro- 

 duced from the resting cells, and 

 copulate to form zygozoospores. 

 The host-plants are not injured 

 by this endophyte. 



Chaetophoraceae. 



Most of the species are aquatic 

 algae which live independent or 

 as epi])liyt(\s. 



Endoclonium polymorphum 

 Frank (see Chlorosphacra rndo- 

 phyta Klebs). This form lives 

 endophytic and sometimes intra- 

 cellular in living or dead leaves 

 of Lrmaii. 



Entoderma Wittrockii Wille 

 occurs inside the wall of Ectorarpvs (Fig. 327). 



Periplegmatium and Phaeophila live endophytic in living 

 algae. 



Trentepohlia endophytica (IJeinsch). In living cells and 

 intercellular spaces nf Jungeruianniaceae (e.g. FruUania dilatata) 

 and kills them. 



Fig. •A-ll. — Eiitoder 



wair 



in the 



membrane of a .species of Alga (AV^ocoz/h/s). 

 A, \ young one-celled plant just after jjene- 

 tration into the alga. B. Plant composed of 

 several cells in the wall of EHnnn-iius. C, 

 Plant which has formed sporangia of swarm - 

 spores, one of which is discharged and 

 another is in the act. (After Wille.) 



