183 



> 



A parallel but simpler case is also met with in Diaporthe 

 aescidicola (Cooke) B. & W, which has the following pycnidia : 



Phoma diplodioides, Sacc. 

 Scpt&myxa aesculi, Sacc. 

 Diplodina trvncata, Sacc. 



All these cases are complicated by the difficulty (in addition 

 to the change of spore-form) that there may or may not be a 

 real pycnidial wall, according to the stage of development that 

 has been reached. 



466. Phoma Ampelopsidis, Sacc. and 470. Phoma 



pallens, B. & C. 



P. Ampelopsidis, Sacc, was a new r combination based on 

 Sphaeropsis Avipelopsidis, Cooke & Ell. in Grevill. 1878, vi. 84, 

 pi. 99. f. 8 (= Macrophoma Ampelopsidis, Berl. & Yogi, in 

 Sacc. Svll. Addit., p. 30b), but the species of Cooke and Ellis does 

 not exist. The spores assigned to it by Cooke (I.e.) are the 

 escaped ascospores of the accompanying Sphaeria which he men- 

 tions. It appears to be a Phy&aloxpora, but in view of the 

 scantiness of the material present no description can be 

 attempted. The naviculoid spores described and figured by 

 Cooke could be seen both in and out of the asci; they measure 

 30-32 x 10-11 p., and are very granular (Fig. 5). There were 

 none on sporophores. 





■ 



Physalospora sp. from Cooke & Ellis's specimen named 



Sphaeropsis Ampelopsidis. 



But on the same twigs of Ar/rpelopsis quinquefolia there is a 

 Plwmopsis which differs from P. viticola, Sacc. (in Annal. Mycol. 

 1915, xiii. 1.18) in external appearance, especially in the totally 

 undiscoloured epidermis. It may be described as follows: 



Phomopsis viticola, Sacc. var. Ampelopsidis, Grove. 



Pycnidia gregaria, valde imperfecta, subglobosa, 200-300 /x 

 diam., innata, nigresccntia, convexa, vix papillata, epidermidem 

 colore omnino immutatam levant, tandemque irregulariter fin- 

 dunt, at rarius supra earn extant: senio vertex dilabitur. A- 

 sporae copiosissimae elliptico-fusoideae vel sublanceolatae, 

 utrinque acutae, ut plurimum rectae, biguttulatae, 8-9 x 2 /x, 

 sporophoris subulatis, usque 15 fi longis, infra ca. 2 p latis 

 suffultae: B-sporae filiformes, hamatae vel rarius flexuosae, 20- 

 25 x 1 fi, sporophoris brevibns suffultae. 



ram ul 





fi 



Sew Jersey, J. B. Ellis, no. 2704! A very typical Phomopsis 



and agreeing with P, viticola except for the total absence of 

 discoloration in the epidermis. 



