428 



Hah. in caulibus emortuis Veronicae spicatae, Grand Quevilly 

 Galliae (Koum. Fung. Gall. exs. no. 2960!). 



Tliis species is distinguished from P. striae for mis, Dur. & 

 Mont., under which Saccardo places it, by its occurrence on 

 herbaceous stems where it forms little linear groups, hidden at 

 first under the blackened fibres of the wood, and at length split- 

 ting them apart in an hysteriiform fashion. Varieties of the 

 same species occur on Atropa and Chaerophyllum. 



773. Phoma Marrubii, Sacc. 



Phomopsis Marrubii, Grove. 



Sphaeronema Marrubii) Dur. & Mont. Flor. Alg. p. 580. 



Pycnidia gregarious on bleached spots, black, up to 250 //. diam. r 

 imperfect, lens-shaped, depressed, covered by the epidermis, each 

 surrounded by a faint blackish stain and without any pale spot in 

 the centre. Spores oblong-lanceolate, curvulous, acute below, 



8-10 x «2'5 // ; sporophores subulate, curvulous, 18-20 x 2 /*. 

 rising from a dusky-olive stratum. 



On dry dead stems of Marrabium vulcjare, Toulouse (Eoum. 

 Fung. Gall. ex-, no. 2120!). 



The bleached spots resemble those of P. albicans and P. 

 hysteriola, £. Veronicae, but the pycnidia are slightly different 

 and in the latter species are differently arranged. The descrip- 

 tion in Flore d'Algerie is obviously that of a Phomopsis, all the 

 external points that distinguish the genus being unconsciously 

 recorded. 



778. Phoma denigrata, Desm. 



PuoMorsis DEN1GRATA, Trav. Flor. Ital. Crypt, ii. 230, 



Phoma denigrata, Desm. in Ann. Sci. .Nat. 1853, xx. 218. 



Pycnidia loosely scattered more or less along the entire stem 

 which is blackened over the whole occupied part, 250-350 /x long, 

 convex, irregular, longitudinally placed, black, immersed, then 

 erumpent by the shining black papilla ; pycnidial wall hard and 

 thick above, and sometimes the whole upper part falls away as 

 described in other species, leaving a whitish pit behind. A-spores 

 " fusoid, biguttulate, 10-12x3*5-4 jx " (Sacc): B-spores 

 filiform, curved or hamate, 20-22 x 1 //, on short ampulliform 

 sporophores : C-spores broadly fusoid or fish-shaped, very acute 

 at both ends, pluriguttulate, 12-15 x 3*5-4 /*; sporophores subu- 

 late, curvulous, but never hamate, a little longer than the spore 

 or half as long again, rising from a dusky proliferous stratum. 

 (Fig. 1, b.) 



c 



•5 



Fig. 1. a. Phomopsis Acanthi, from Bourn, no. 717; b, B and C spoils of 



P. denigrata ; c, A and B spores of P. multipunctata. 



