488 



FUNGI IMPERFECTI. 



Faded spots appear on the leaves, becoming later greyish brown dotted 

 over with minute black points, the couidial patches.' 



C. ampelinum Cav. causes little dry spots on the leaves of vine, fre- 

 quently in such numbers that the whole leaf dries up. 



C. kentjae Hals, attacks palm-seedlings so 

 that their leaves do not unfold. 



C. cyclameneae Hals, occurs on Cydamen. 



Scoleco-Allantosporae. 



Cylindrosporium. 



The white and shining conidial 

 cushions are embedded in the host- 

 plants. The conidia are filamentous, 

 frequently somewhat twisted. 



Cylindrosporium Tubeufianum Alles- 

 cher. This attacks the living green fruit 

 of the bird-cherry, and causes the forma- 

 tion of brown spots from which pustules 

 break out ; the premature dropping of 

 diseased fruits follows. In the locality 

 where I observed this disease, numerous 

 trees were attacked and most of the fruii, 

 on each was badly diseased. The my- 

 celium spreads through epicarp and 

 mesocarp, but does not penetrate into 

 the endocarp, so that the development 

 of the embryo is not directly interfered 

 with. The conidia originate in pycnidial 

 cavities without any special peridium ; 

 their shape is given in the annexed 

 diagnosis.^ The pycnidial cavities arise 



under the epidermis which is afterwards ruptured and with the 



cells underlying it becomes brown and dead. 



' This note is taken from Underwood, Joxvnial of Mycology, vii. , but no 

 mention is made of it in the later paper by Webber and Swingle (" Diseases of 

 Citrous Fruits in Florida," U.S.A. Dept. of Agriculture BnUetin, 8, 1896). (Edit.) 



'^ Alleacher gives the following diagnosis of this species : Piistvlis primum 

 convexis, epicarpio tectis, dein applanatis scutiformibusve, epicarpio rupto cinctii, 

 suhcirculwrihus, saepe caespitosix vel conflnentibus, luteo-brunneolis, snbfurfuraceis ; 

 acervulis, minutis, innalis, entmpentibus ; conidiis Jiliformihus, curvatis vel flex- 

 uosis rmiltigvitulatis, hycUmis 40-60 = 2-3,14. Hab. in fnictibiui immaturis Pnmi 

 Padi, quos neccU. 



Fig. 299. — Cylindrosporium 

 Tubeujianum on fruits of Pi-unus 

 Padus. The unshaded parts re- 

 present parts still green and 

 living, although bearing pustules 

 here and there ; the remaining 

 parts are completely beset by 

 pustules, so that the cells ai'e 

 killed and brown. -^ natural 

 size. (t. Tubeuf del.) 



