CONIDIA 283 



of many smuts bud indefinitely in yeast-like fashion, and these 

 buds, like conidia, may eventually serve to initiate infection. The 

 urediniospores of rusts are like conidia in their origin, and, since 

 they function in dissemination, may in a sense be considered 

 conidia. The basidiospores of many jelly fungi germinate by 

 formation of sprout cells that may eventually develop mycelia. 



In Copmms lagopiis [Brodie (1931)] lateral oidiophores arise 

 from the mycelium. These become segmented basipetally into 

 ellipsoidal oidia that cling together in balls at the apices of short 

 branches, the remnants of the oidiophores. These oidia may 

 function as conidia or else in diploidization, as has been men- 

 tioned. 



Chlamydospores may form as a powdery layer at the upper 

 surface of pilei of certain mushrooms, notably Nyctalis aster o- 

 phora and N. parasitica. These mushrooms parasitize species of 

 Armillaria, Clitocybe, Cantharellus, Lactarius, and Russula. 



Gemmae have been noted to arise as propagative devices in 

 several Hymenomycetes. Perhaps the most striking of these is 

 Ornphalia flavida [Buller (1934)], whose stalked gemmae are 

 formed on the leaves of coffee and other tropical species. This 

 stage produces leaf spots, and the gemmiferous structures, which 

 are like those in Stilbum, cover the lesions. 



True conidia, belonging to the form Genus Oedocephalum, 

 occur in Corticiimt effiiscatiim, C. roseo-pallens, Fonies annosiis, 

 Peniophora allescheri, Tomentella flava, and T. gramdata [Nobles 

 (1935)]. They are uninucleate in P. allescheri, according to 

 Nobles, whether they are produced on haploid or diploid my- 

 celia. Conidia from the haploid mycelium are of the same sexual 

 phase as the mycelium from which they are derived, whereas 

 those from the diploid mycelium are of two kinds, some of one 

 sexual phase and the remainder of the other. Fleiirotiis pinsitus, 

 P. corticatiis, and Corticiiim calceimi are also said to form conidia. 



LITERATURE CITED 



Bauch, R., "Untersuchungen iiber zweisporige Hymenomyceten. II. Kern- 

 degeneration bei einigen Clavaria-arten," Arch. Protistenk., 58: 285-299, 

 1927. 



Bensaude, M., Recherches sur le cycle evohitif et la sexiialite chez les Ba- 

 sidioinycetes. These (Paris). 153 pp. 1918. 



