HELOTIACEAE 



26S 



recently monographed by White (1941), lacks a conidial stage 

 and has ascospores that are one- to several-septate. Septotima 

 podophyllinay the generic type of Septotinia, possesses elongate, 

 septate conidia borne on sporodochia, but its other structures are 

 like those of Sclerotinia [Whetzel (1937)]. Lambertella, having 

 brown ascospores, but otherwise quite like Rutstroemia, has 

 been monographed by Whetzel (1943). 



Certain members of the Ciborioideae (Sclerotiniaceae, accord- 

 ing to Whetzel) are known to possess ascospores enclosed by 

 gelatinous envelopes. These envelopes constitute adaptive de- 



FiG. 108. Some Geoglossaceae showing differences in discocarps, asci, asco- 

 spores, and paraphyses in three representative genera. A. Leotia. B. 



Geoglossum. C. Spathularia. 



vices to cause ascospores to adhere to the suscept and to retain 

 and supply moisture during germination. Attention was re- 

 cently directed to these structures occurring in Ciboria canincu- 

 loides and Monilima friicticola [Whetzel and Wolf (1945)]. 



Fungi of other tribes of Helotiaceae. In the Tribe Ombro- 

 philoideae is Cenangiinn abietis, the cause of dieback of twigs of 

 pines, especially on trees whose vigor has been reduced by 

 drought or other factors. Clusters of brown to black apothecia 

 break through dead bark in the late summer and autumn. The 

 hymenial surface is greenish. The ascospores are hyaline and 

 elliptical. A conidial stage is unknown. In the same tribe occurs 

 Chlorospleiiiinn aeniginosiim, which occurs on the decorticated 

 slash of hardwoods and stains the wood a brilliant verdig^ris screen. 



