192 



young Diplodias. but Berkeley seems to have united the spores 

 of the one with the pycnidia of the other. The one of which 

 he gives the host is probably merely a form of Diplodia 

 Crataegi, "Westd. 



Diplodia Crataegi., Westd. , in Kickx, Flor. Fland. i. 393. 

 Sacc. Svll. iii. 340. f. Pyracanthae, m% 



diam 



surrounded above by a reddish meal which arises from the 

 cortex. Spores oblong- or obovoid, rounded at the ends, olive- 

 granular, 20-25 x 9-10 /j.; sporophores 



b 



1-guttulate, 



hyaline, straight, 15-16 x 2-5 fx. (Fig. 12). 



D. Crataegi, from Berk. no. 4056. The spore on the right is young 



and colourless, the others are olive-brown. 



On 



branches of Crataegus Pyracantlia, Pennsylvania, 



Michener (Herb. Berk. no. 4056 ! marked in Berkeley's hand- 



writing 



" in Mesp. pyr./' 



i.e., on Mespilus Pyracantlia 



Crataegus Pyracantlia; it is not on Mespilus germanica). Obvi- 

 ously an immature Diplodia. 



Berkeley gives a sketch of a spore, showing it to be oblong and 

 about 37-5 fx long. But there can be no doubt that his descrip- 

 tion in words (I.e.) was influenced by the specimen mentioned 

 next, which is different and has much more fusiform spores 

 than even the young spores of this species on Crataegus, and for 

 which the name Pltoma fusigera can provisionally be retained : — 



Pjioma fusigera, Sacc. emend. Grace. 



long, immersed, then 



mo 



gliij 



90 i 



Pycnidia oblong, black, about 200 fi 



n lines. Spores not numerous, fusoid, 



htly more obtuse above, colourless, granular, eguttulate, 



-28 x 6-7 fx, often slightly inequilateral; sporophores short. 



branches of Wistaria, South Carolina 



On dead 



g* 



(Curtis, in Herb. Berk) 



P. fusigera, from Curtis'* specimens. 



On these specimens there is no trace of red granular matter. 

 It is almost certainly a young Divlodia but, although there is 

 little doubt, one cannot assert with perfect confidence that it 



Wistariae, Bran. (Sacc, Syll. iii. 335), 



the voung spores of that species. 



ea 



since it is not exactly like 



On one of the older branches of Wistaria it is accompanied by an 



