ENDOPHYLLUM 



335 



2. Endophyllum Sempervivi De Bary. 



Credo Sempervivi A. et S. Consp. p. 126. 



Endophyllum Sempervivi De Bary, Morphol. p. 304 (sec. Saccardo). 



Cooke, Handb. p. ">4(i ; Micr. Fung. p. 200. 



Plowr. Ured. p. 229. Sacc. Syll. vii. 767. 



Fischer, Ured. Schweiz, p. 436, f. 297. 



Hoffmann, Centralbl. f. Bakter. xxxii. 137, 



f. 1 — 14 and pi. i, ii. 



Fig. 252. E. Sem- 

 pervivi. Sori on 

 Sempervivum mon- 

 tanum (reduced). 



Spermogones. Scattered amongst the 

 secidia, roundish. 



Teleutospores. Sori rather large, amphi- 

 genous, sunken in the leaf, secidium-like, sur- 

 rounded by many layers of hyphse and by a 

 peridium, which opens by a pore at the summit 

 and finally becomes cup-shaped ; spores bluntly 

 polygonal or roundish, }^ellowish-brown, densely reticulate-ver 

 rucose, 24 — 35 x 21 — 28//.; epispore 3 — 4^ thick. 



On Sempervivum tectorum ; also found 

 on S. calcareum, S. globiferam, S. montanum 

 (Plowright), S. arachnoideum (Fischer) and 

 others (Saccardo). Not common, Warwick- 

 shire, Forclen, Kew Gardens, etc. April — 

 August. (Figs. 252, 253.) 



It has been proved by De Bary, Hoffmann 

 and others that the basidiospores produced by the 

 teleutospores infect the leaves, and from them arises 

 a mycelium which perennates in the stem. It 

 produces spermogones and teleutospores in the 

 following spring. The affected leaves are more 

 erect than normal ones, twice as long, narrower 

 and yellowish at the base : infested plants should 

 be burnt, so that they may not infect others. See 

 the fuller account given on pp. 53-5. 



Distribution : Europe. 



Fig. 253 E. Semper- 

 vivi. ^Ecidio-teleu- 

 tospore germinating 

 (after Hoffmann). 



