197 



i 



i 



specimens issued by Marcucci and Roumeguere are on twigs, 

 but are practically identical with those on leaves. Moreover, 

 judging by the descriptions and figures, G. llcsperidearum 

 Catt. is not different, and G. intermedium, Sacc. differs only in 

 the sometimes bordered spots, a distinction which arises merely 

 from its occurrence on younger and fresher leaves. 



Description of the British specimens, u G. Hendersonii. 



B. & Br." 



No distinct spots on the dry leaves. Pustules mainly hvpo- 

 phvllous, densely scattered over the leaf, roundish, 150-230 p 

 diam., fuscous, surrounded when young by a blackish line, 

 blackish "when old, flat, then bullate and erumpent, Spores 

 cylindric-ellipsoid, rounded at both ends, with a faint yellowish 

 tint in mass, often biguttulate, 14-18 x 5-6 /x ; sporophores 

 about as long. (Fig. 19). 



c 



G, Aurantiorum ; a, from Rab. no. 1330; b f from Roum. no. 90; 



c, from Berk. no. 3642. 



On dying leaves of Orange, in a conservatory, Milton. Norths 

 (Berkeley, Herb. no. 3642!). 



SPECIES TO BE TRANSFERRED TO COLLETO 



TRICHUM. 



562. Phoma tertia, Sacc. 



Sphaeropsis tertia, Cooke in Grevill. 1883, xii. 22. 



Macrophoma tertia, Berl. & Vogl. in Sacc. Sy 11 . Addit. p. 307. 



The specimens referred to S. tertia by Cooke, on twigs of 

 Ailanthus, Aiken, South Carolina (H. W. Eavenel, Fung. N. 

 Amer. no. 2172 I), are infested with at least three fungi : (1) a 

 Colletotrichum, (2) a Laestadia (see below), and (3) a Diplodia. 



The first of these is the one examined and described by Cooke, 

 which, therefore (if distinct), should bear the name Collctotri- 

 ehum tertium. There are two described species which are very 

 similar, both occurring on petioles of Ailanthus glandulosa, (11 

 C. Ailanthi, Togn. Second Contr. Micol. Tosc. p. 16 (in Atti 

 Istit. Bot. Pavia, 1899, v. 16) and (2) Vermicularia petiolicola. 



Brun. Sphaerops. Char. 1889, p. 39 (Sacc, Syll. xiv. 908). 

 The former, however, is credited by the author with falcate 

 spores, and the latter has much longer, darker, more numerous, 

 conspicuous bristles, and differs greatly in outward appearance. 

 See Journ. Bot. 1919, p. 341. 



(1). COI-LETRICHUM TERTIUM, Grove. 



Pustules densely scattered, flat, round, black, paler in the 

 centre, 100-120 p diam., disc surrounded by a ring of incon- 

 spicuous setae, covered, then emergentlv bursting the epidermis; 

 setae few (sometimes wanting altogether], tapering to a point, 







