Rev. M.J. Berkeley and Mr. C. E. Broome on British Fungi. 99 



swollen in the centre or above. Spores oblong, extremely obtuse, 

 constricted in the centre, triseptate, the central septum answer- 

 ing to the line of constriction. 



A most beautiful species, well distinguished from the others 

 by the triseptate spores. The notion of the genus must be taken 

 from the figures in the ' Pracht-Flora,' and not from those in 

 Sturm or Corda's ' Icones,' which are extremely defective, and 

 convey anything but a correct idea of a very curious production. 



Plate V. iig. 7. a. Flocei and spores magnified ; b. spore highly mag- 

 nified. 



513. Cladosporium dendriticum, Wallr. Comp. Fl. Germ. 2. 

 p. 169. Cladosjwrium pyrorum, Berk, in Gard. Chron. 1848, 

 p. 398. Hehninthosporium pi/roru7n,'L\h. no.lSS; Desm. no. 1051. 

 Abundant on leaves of pear-trees in autumn. 



The spores in Madame Libert's plant are uniseptate and 

 broader at one end ; in ours and Desmazieres' in general almost 

 fusiform and simple, though sometimes clavate. 



513. C. orbiculatum, Desm. Ann. d. Sc. Nat. ser. 3. Mai 1849, 

 p. 275 ; Exs. no. 1843. On the leaves of Cratacjus Pyracantha, 

 gardens of Horticultural Society, Chiswick. 



Closely resembling the last, but differing in its shorter pyri- 

 form spores. Some observations on this species will be found in 

 'Gard. Chron.' 1848, p. 716, where however it was not consi- 

 dered as specifically different from C. dendriticum *. 



514. C. depi-essum, n. s. Maculseforme depressum; sporis 

 elongatis uniseptatis fioccos brevissimos fequantibus. On the 

 under surface of the living leaves oi Angelica sylvestris : common. 

 Mr. Ualfs has sent it from Dolgelley. 



Spots minute, scattered, olive-green, depressed. Flocei short, 

 straight, or flexuous, sometimes quite even, sometimes waved or 

 nodulose. Spores much elongated, as long as the threads, ter- 

 minal, uniseptate. Sometimes they are constricted and the ar- 

 ticulations much swollen. They often germinate in situ, giving 

 out a delicate waved thread from the centre of the articulations. 



This species is clearly allied to the foregoing, but has far 

 longer spores. A very similar species occurs in the Canaries on 

 some Umbellifer. 



Plate V. fig. 8, a, b. Two different forms of flocei with their spores 



magnified. 



515. C. brachormium, n. s. Effusum griseum ; floccis erectis 



* In a letter just received from M. Desmazieres, he informs me that he 

 is now convinced that the two supposed species are mere varieties, and that 

 he will make a statement to this effect in a forthcoming number of his 

 'Exsiccata.'— M. J. B. 



7* 



