38 SPHAERIACEAE— VERRUCARIACEAE 



(x) Perithecia very large, disk-form, corticole 



Therrya 2: 358 

 (y) Perithecia small, globose, on grasses and palms 



Dilophia 2: 357 

 (b) Perithecia hairy Ophiochaete 11: 353 



2. Perithecia superficial or immersed at base 



a. Perithecia beaked Ophiochaete 11: 352 



b. Perithecia not beaked 



(i) Perithecia fimicole Bovilla 2: 360 



(2) Perithecia not fimicole 



(a) Perithecia glabrous 

 X. Perithecia globose 



(x) Perithecia immersed at base 



Acerbia 11:353, 14:619 

 (y) Perithecia wholly superficial 



Leptosporella 14:619 

 y. Perithecia elongate cylindric; ostiole sulcate 



Bactrosphaeria 14: 617 



(b) Perithecia hairy Acerbiella 17: 768 



II. Perithecia in a stroma 



1. Stroma superficial 



a. Perithecia in an efifuse definite stroma Maurya 14: 620 



b. Perithecia densely heaped in a thin vanishing stroma 



Pseudomeliola g: 938 



2, Stroma immersed or erumpent 



a. Stroma erumpent, yellow within Sillia i : 361 



b. Stroma immersed, valsous 



(i) Necks of perithecia short, scarcely converging 



Vialaea 14: 619 



(2) Necks long, converging into a disk 



Cryptospora 2: 361 



Family 19. VERRUCARIACEAE 



Zahlbruckner si 



Mycelium parasitic on bluegreen or yellow green algae, and forming a more 

 or less distinct crustose, foliose or fruticose thallus, the latter usually superficial 

 but sometimes below the surface ; perithecia distinct, single or cespitose or united 

 in a stroma, usually globose and ostiolate, membranous, coriaceous or carbonous ; 

 asci i-many-spored; spores various. 



I. Perithecia separate, at least not in a stroma (Cfr. Lichinae, page 74.) 

 I. Algae bluegreen, Nostoc, Scytonema, Sirosiphon, or Calothrix 



Subfamily Pyrenidiae 76 

 a. Asci 4-8-spored 



(i) Asci 4-spored; spores 3-septate Pyrenidium 77 



(2) Asci 6-8-spored 



(a) Spores spheric, i-celled: algae Calothrix 



Calothricopsis 165 



(b) Spores fusiform, i-septate 



