189 



APPENDIX A. 



CLASSIFICATION & DESCRIPTIONS OF FUNGI 

 CONTAINED IN THIS YOLUME. 



-«o*- 



JECIDIACEI. 



Peridium elongated — 



separating in threads . . . . Bccstelia. 



rupturing irregularly . . . . Feriderniium, 



Peridium abbreviated, or senii-iinmersed . JEcidium. 



Peridium immersed Enclophyllum. 



RCESTELIA, Reb. 



Peridium elongated, at length opening by lateral fissures, or a 

 terminal lacerated mouth. Spermogonia on the opposite 

 surface, on the same or on difl'erent leaves. 



Roestelia cancellata, Reb. Pear-leae Rcestelia ; spots 

 yellow, then red, prominent; peridia split to the base into lacinia*, 

 which remain united at the apex. — On Pear leaves. Not very 

 common. Autumn. (Plate II. iigs. 20, 21.) 



Roestelia cornuta, Tul. Horn-like Rcestelia; spots 

 rusty-brown; peridia cylindrical, slightly curved, yellowish - 

 brown ; spores greyish, at length brown.— Uu the under surface 

 of the leaves of Mountain Ash. Not common. August. (Plate II. 

 %s. 18, 19.) 



Rcestelia lacerata, Tul. Lacerated Rcestelia ; peridia 

 clustered in tufts, brown, elongated, splitting to the base in 

 segments ; spores light brown. — On the under surface of the 

 leaves, and on the petioles and fruit of the Hawthorn. Not.- 

 uncommon. May to July. (Plate II. figs. 23, 20. ' 



