437 





Pycnidia densely scattered, snbglobose, more or less depressed,. 



black, covered by the epidermis, then erumpent by a small 



papilla, at length nearly free, up to 250 u diam. ; texture thick, 



DiplodiaAike. Spores elongate-ellipsoid or subfusoid, always 



colourless, cloudy within, continuous, 15-23 x 5-5*5 p. (Fi 

 5, a.) 



On stems of Ricinus communis, Aiken, South Carolina 

 > (Ravenel, Fung. Amer. exs. no. 543!, and Cooke, Fung. North 



Amer. no. 2630!). 



In all these specimens the spores are in length very variable 

 (some only 13 /* long, others reaching even §0 />.) though re- 

 maining constant in width; they are colourless, but evidently 

 not mature, and all continuous except that in one a faint median 

 septum could ,be discerned. They are closely similar to those 



previously 



/ 



fusispora (see supra, pp. 191-3), and like them are strongly 

 reminiscent of a Diplodia. They must all stand or fall together; 

 in this case the Diplodia is probably D. Ricini, Sacc. & Eoum., 

 but no specimen of this was at hand for comparison. 



But on the same sheet of one of Tlavenel's specimens, and on 

 the same stem which contains the u Sphaeropsis 9f just referred 

 to, is a very different fungus: — 



Phomopsis Eicixi, sp. no v. 



Pycnidia dense gregaria, rot nn data, convexa, ca. 200 p diam. r 

 atra, epidermide obscurata tecta, halone nigrescente cineta, 

 •andem ostiolo emergentia; contextu partis superioris crasso, atro- 

 brunneo. Sporulae fusoideae, utrinque subacutae, biguttulatae, 

 7-9 x 1*5-2 p., sporophoris subulatis, acutis, achrois, 12-15 p 

 longis, deorsum 3 u latis, e strato crasso atro-olivaceo oriundis 

 niffftltfte. (Fig. 4, d.) 



Hob. in stipite emortuo Ricini communis, Aiken Carolinae 

 australis. It may l}e conjectured that this is the pycnidial 

 stage of the South American Diaporthe Ricini, Speg. 



872. Phoma Triacanthi, Sacc. 



Sphaeropsis Gledit&ehiae, Cooke in Grevill. vi. 134 (non 

 Thiim,). 



Macrophoma Triacanthi, Berl. & Yogi, in Syll. Addit. p. 310. 



On the sheet bearing this name are two different fungi, but 

 probably both belonging to the same life-cycle. The first, which 

 is that intended by Cooke, shall be de>cribed as: 



I. — Dothiorella Gleditschiae, Grove. 



Sphaeropsis Gleditschiae, Cooke. 



Pycnidia compound, forming a roundish or angular erumpent 

 mass, 30O-500 /x diam., black, convex, with a thick texture of 

 minute dark-brown parenchymatous cells; cavity divided into 

 several pseudo-locelli by paler translucent walls. Spores quite 

 cylindrical, obtuse at both ends or faintly acute below, straight, 

 hyaline; sporophores similar to the ^nores, but shorter. (Fig. 

 °, 6.) 



