ASCOMYCETES 383 



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



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



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



3 ser., Tom. xv.). 



Tulasne— M&n. pour serv. a I'hist. organograph. et physiol. des Lichens (ibid., 3 



ser., Tom. xvii. ). 

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

 Tulasne — Mem. sur I'Ergot des Glumacees (ibid.). 

 Tulasne — Note sur I'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., 



1853.) 

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

 Tulasne — De quelques Spheries fongicoles (ibid. , 4 s^r. , Tom. xiii. ). 

 Tulasne — Note sur les ph^nomenes de copulation d. 1. Champignons (ibid., 5 s6r., 



Tom. v.). 

 Tulasne — Super Friesiano Taphrinarum genere (ibid. ). 

 Vittadini — Monographia Tuberacearum (Mediolani, 183 1). 

 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 — Sphasria Lemane^, Sordaria, &c. (ibid., in.). 

 Zopf— Zur Entwickelungsgesch. d. Ascomyceten (Chsetomium) (Nova Acta Leop., 



xlii.). 

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



Class XXI.— Uredineae. 



The Uredineae are a class of parasites on flovyering 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 (^cidium, Pers., Uredo, 

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

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

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



