ASCOMYCETES 383 



Tulasne Selecta Fungorum Carpologia, i.-iii. (Paris, 1861-65). 



Tulasne Rech. sur 1'organisation des Onygena (Ann. Sc. Nat., 3 ser., Tom. i.). 



Tulasne Note sur 1'appareil reproducteur des Lichens et des Champignons (ibid.,. 



3 ser., Tom. xv.). 



Tulasne Mem. pour serv. a 1'hist. organograph. et physiol. des Lichens (ibid., 3, 



ser. , Tom. xvii. ). 



Tulasne -Discomycetes (ibid., 3 ser., Tom. xx.). 

 Tulasne Mem. sur 1'Ergot des Glumacees (ibid.}. 

 Tulasne Note sur 1'appareil reprod. des Hypoxylees et des Pyrenomycetes (ibid., 



4 ser., Tom. v. ). 



Tulasne Nouv. observ. sur les Erysiphes (ibid., 4 ser., Tom. i.). (See also Bot. Zeit.,. 



18530 



Tulasne Note sur les Isaria et les Sphaeria entomogenes (ibid., 4 ser., Tom. viii.). 

 Tulasne De quelques Spherics fongicoles (ibid., 4 ser., Tom. xiii.). 

 Tulasne Note sur les phenomenes de copulation d. 1. Champignons (ibid., 5 ser.,. 



Tom. v.). 



Tulasne Super Friesiano Taphrinarum genere (ibid.}. 

 Vittadini Monographia Tuberacearum (Mediolani, 1831). 

 Vogel Gymnoascus uncinatus (Bot. Centralblatt, xxix. ). 

 Wilhelm Beitr. zur Kenntniss d. Pilzgattung Aspergillus (Diss. Berl., 1877). 

 Woronin Entwickelungsgesch. d. Ascobolus pulcherrimus und einiger Pezizen 



(Beitr. zur Morph. u. Physiol. d. Pilze, ii.), 

 Woronin Sphaeria Lemaneae, Sordaria, &c. (ibid., iii. ). 

 Zopf Zur Entwickelungsgesch. d. Ascomyceten (Chaetomium) (Nova Acta Leop.. 



xlii.). 

 Zopf Die Conidienfriichte von Fumago (ibid., xl.). 



Class XXI. Uredineae. 



The Uredineae are a class of parasites on flowering plants and ferns*. 

 They resemble the Ascomycetes in many points, as will be seen from 

 this short account of them. The mycele is septate and much branched, 

 follows the intercellular spaces of the host-plants, and penetrates the. 

 cells themselves by means of short branches. 



Puccinia graminis (Pers.) may be taken as a type of the course of 

 development followed by some of the forms. Owing to the change of 

 host involved in the course of development of this and other forms, and 

 to the different appearances presented by succeeding stages of the 

 organism, it was formerly supposed that these stages constituted distinct 

 fungi. Thus no less than three form-genera (^Ecidium, Pers., Uredo, 

 Pers., and Puccinia, Pers.) were established to denote the stages of the 

 life-cycle of Puccinia graminis, the well-known com mildew. The 

 sporocarp (^Ecidium) is formed in spring on the barberry. In its 



