40 FUNG US-FLORA 



elliptical, 30-35 x 20, often slightly constricted at the basal 

 si ptum, contents granular, somewhat orange-colonr. 



Mycogone ance^s, Sacc, Mich., ii. p. 372 ; Sacc, Syll., 

 n. 902. 



On dung, human and other. 



Chlamydosporous condition of Piloholus ocdqms. 



DIDYMAEIA. Corda. (fig. 17, p. 274.) 



Parasitic. Ilypliae subsimple, erect, gregarious, bearing 

 a single two-celled, colourless conidium at the tip. 



Didymaria, Corda, Ic. Tung., \i. p. 8 ; Sacc, Syll., iv. 

 p. 184. 



Didymaria Ungeri. Corda. (fig. 17, p. 27-i.) 

 Forming subcircular ochraceous spots that become pale 

 M-ith age ; tufts white, minute, hypophyllous ; fertile hyphae 

 erect, fasciculate, slender, unbranched, without septa, oO-GO 

 X 3-4 fjL, bearing at the tlj) a single obovate-elliptic, colour- 

 less, l-sej^tate conidium scarcely or not all constricted at 

 iLe septum, 20-25 X 7-10 /x. 



Didymaria Lngeri, Corda, Anleit., t. B., f. 9. I. ; Sacc, 

 Syll., iv. n. 904. 



On the under surface of living leaves of Hanunculus 

 vfjjnis. 



BOSTIilCHONEMA. Cesati. (fig. 18, p. 274.) 



Parasitic. Hj-phae erect, unbranched, spirally wa^-ed, 

 without septa, colourless. Conidia elliptic or oblong, 

 wo- celled, hyaline. 



BostricJwnema^ Cesati, Erb. Critt. Ital., n. 149 ; Sacc, 

 Syll.. iv. p. 185. 



Distinguished from Didymaria by the wavy or sj)iially 

 curved fertile hyphae. 



Bostrichonema alpestre. Ces. (fig. 18, p. 274.) 

 Spots subcircular, ochraceous-brown ; fertile hyphae 

 forming white tufts on the under surface of the lenf, 

 t^pirally waved, 130-140 X 4-6 fi, sparingly septate, not 



