CRIBRARIA 217 



to be observed that fig. 21 represents higher magnification; otherwise 

 the two figures are very much alike. 



New England and Ontario to Maryland, Washington and California; 

 Europe. 



16. Cribraria laxa Hagelstein 



Mycologia 21 : 298. 1929. 



Sporangia closely gregarious, erect, globose, 0.5-0.7 mm. in diam- 

 eter, dark brown; stipe dark brown, furrowed, short, 0.7-1.4 mm. in 

 height, calyculus occupying about one-third of the sporangium, 

 strongly ribbed, with numerous cross veins connecting the ribs, be- 

 tween them a thin glistening membrane; net arising from the ribs, 

 wide-meshed, the nodes large, thickened, dark brown, crowded with 

 granules, free ends few, connecting threads slender and lax; hypothallus 

 very broad; spores ochraceous in mass, pale by transmitted light, 

 warted, 6-7 /x. 



Known only from Long Island, where it was found in successive 

 years growing on leaves, a most unusual habitat for a cribraria. 



17. Cribraria exigua Meylan 



Bull. Soc. Vaud. Sc. Nat. 57 : 304. 1931. 



Sporangia solitary or widely scattered, minute, spherical, 0.15-0.2 

 mm. broad, reddish tawny, as in C. rufa; stipe slender, red, five or six 

 times the diameter of the sporangium; calyculus almost lacking; net 

 lax, with large meshes and rounded or polygonal nodes 15-20^ in 

 diameter, very opaque; free ends none or few; spores reddish ochra- 

 ceous in mass, finely papillate, lacking dictydine granules, 7-9 /*. 



Said to be related to C. vulgaris (C. aurantiaca as here interpreted). 

 Suggesting C. tenella in aspect, but smaller, with coarser net and much 

 larger spores. 



Switzerland. 



18. Cribraria rufa {Roth) Rost. 



Mon. 232. 1875. 

 PL XIV, Fig. 367. 



1788. Stemonitis rufa Roth, Fl. Germ. 1 : 548. 



1794. Cribraria rufescens Pers., Roemer N. Mag. Bot. 1 : 91. 



1797. Cribraria fulva Schrad., Nov. Gen. PL 5, pi. 1, fig. 1. 



1808. Trichia rufescens (Pers.) Poiret, in Lam. Encycl. 8 : 55. 



Sporangia scattered, subglobose or turbinate, dark or reddish orange, 

 0.5-0.7 mm. in diameter, erect, stipitate; stipe about equalling the 



