Revisions of Some Plant Phyla 29 



autonomous, although the classification here given is merely pro- 

 visional. 



Order Sphaeropsidales. Spot Fungi. Conidia developed in 

 pycnidia, i. e. perithecium-like " fruits." 



Family 138. Sphaerioidaceae. Pycnidia more or less spher- 

 ical, cuticular, leathery or carbonaceous, black. Phyllosticta, 

 Phonia, Sphaeropsis, Ascochyta, Darluca, Diplodia, Septoria. 

 (Pf. I, I**, 349.) 



Family 139. Nectrioidaceae. Pycnidia more or less spherical, 

 fleshy or waxy, bright colored; spores hyaline. Zythia, Sphaer- 

 onemella, Aschersonia. (Pf. I, i**, 382.) 



Family 140. Leptostromataceae. Pycnidia shield-shaped, cu- 

 ticular or carbonaceous, black. Leptothyriiim, Leptostroma, Lep- 

 tostromeUa. (Pf. I, i**, 386.) 



Family 141. Excipulaceae. Pycnidia more or less dish- or top- 

 shaped, round or elongated, cuticular or carbonaceous, black. 

 Excipula, Amerosporium, Discella. (Pf. I, i**, 392.) 



Order Melanconiales. Black-dot Fungi. Conidia developed 

 upon a stroma which eventually breaks through the epidermis. 



Family 142. Melanconiaceae. Stroma sometimes feebly de- 

 veloped but more often firm and black. Gloeosporium, Colleto- 

 trichum, Melanconium, Coryneiim, Pestalozzia, Cylindrosporium. 

 (Pf. I, i**,398.) 



Order Moniliales. Molds. Conidia developed upon sepa- 

 rate conidiophores which do not form a stroma, but penetrate 

 the epidermis or the stromata singly or in clusters. 



Family 143. Mucedinaceae. Conidiophores hyaline, always 

 separate. Oospora, Monilia, Oidium, Sterigmatocystis, Ovidaria, 

 Sporotrichium, Botrvtis, Verticilliiim, Ramtdaria. (Pf. I, i**, 

 416.) 



Family 144. Dematiaceae. Conidiophores dark or black, al- 

 ways separate. Tonila, Trichosporium, Dcniatiiim, Fusicladiiim, 

 Cladosporium, H elminthosporium, Macrosporimn, Cercospora. 

 (Pf. I, I**, 454-) 



65 



