REPORT OF THE STATE BOTANIST FOR 1 924 81 



Diaporthe tessera (Fr.) Fckl. 

 Newcomb, Essex county, on dead branches of C o r y 1 u s 

 c o r n u t a Marsh. (C. rostrata Ait.) H. D. House, June 21, 

 1923. 



Melanconis modonia Tul. 



South Ballston, Saratoga county, on dead branches of J u g 1 a n s 

 c i n e r e a L., associated with Diaporthe bicincta Cooke 

 & Peck. Melanconis modonia has been heretofore reported 

 only on Castanea, but the material here cited can not be referred 

 elsewhere. The collection is by Doctor Peck, and the chambered 

 pith of the host material makes the identification of the host species 

 positive. 



Melanconiella nigrospora (Peck) Dearness & House, comb. nov. 



'0iatrype nigrospora Peck. 33d Rep't X. Y. State Mus. S3- 1880 

 Melanconis Meschuttii E. &E. Torrey Club Bui. 10 : 1 17. 1883 

 Melanconiella Meschuttii Berl. & Vogl., in Sacc. Syll. Fung. 



Add. i-4a : 129. 1886; 9: 754. 1891 

 Valsaria nigrospora Berl. & \'ogl., in Sacc. Svll. Fung. Add. 1-40 : 



129. 1886 



On dead branches of Betula lutea Michx.f. Quaker Street, 

 Schenectady county. C. H. Peck (type). Sandlake, Rensselaer 

 county, on same host. C. H. Peck. 



Melanconiella subviridis (Peck) Dearness & House, comb. nov. 



Melanconiella Decoraensis var. subviridis Peck ; Ellis, 

 X. Amer. Pyren. 528. 1892 



Stroma circular, reaching 2 mm in diameter, depressed hemi- 

 spheric, covered by the epidermis which is narrowly cleft above the 

 group of minute ostiola. lacking any visible disk. Perithecia 10-15 

 in a stroma. .4-. 65 mm in diameter, coriaceous, circinate around a 

 dull greenish, pulverent core, detachable with the epidermis and 

 leaving their impress in the surface of the unaltered cortex, necks 

 converging not around a disk, but to a point or line and terminating 

 in black, shining, minutely sulcate ostiola, 30-50 ^ in diameter. 

 Asci nearly sessile, cylindrical, 120-125 x 9-12 ix. paraphysate. 

 Sporidia dark brown, uniseptate, uniseriate in the asci, the portion 

 above the septum usually larger than the other. 18-21 x 7-10 /x. 



On dead branches of Betula populifolia Marsh. Ganse- 

 voort, Saratoga county. C. H. Peck, September, 1886 (type). 



Its associated conidial stage. Melanconium subviridis Dear- 

 ness & House, sp. nov. is abundant in the type material, and 

 conspicuous by its blackening the epidermis in circles 2-2.5 mm in 

 diameter. The conidia are inequilaterally fusoid, distally roimded 

 and sub-attenuate proximally, 17-22 x 7-10 /*. 



