54. Phaeographis ] 15. GRAPHIDACEAE 111 



24. Graphis rimulosa (Mont.) Trev., Spighe e Paglie 11. 1853. 



Opegrapha rimulosa Mont., Ann. Sci. Nat. Bot. II. 18:271. 1842. 



Thallus thin to rather thin, smooth to minutely rough, pale greenish gray to 

 ashy; apothecia becoming long and narrow, 1.5-6 X 0.2-0.35 mm., partly immersed 

 to subadnate, straight to curved or flexuous, the disk closed or narrowly open, the 

 exciple black, thick, 1-4 or more times deeply striate, covered laterally by a thin, 

 disappearing, thalloid one; hypothecium hyaline; spores usually 8, long-ellipsoid, 

 9-13-septate, 40-70 X 8-10 [i. 



On trees, Louisiana. Very similar to G. elegans. Herbarium sheet marked that G. 

 rimulosa has complete but very thin basal apothecial wall. 



OTHER SPECIES REPORTED 



Graphis amicta Nyl. — Louisiana. 



Graphis anguilliformis Tayl. — Louisiana. 



Graphis balbisina Nyl. — Florida. 



Graphis cinerea Fee — Florida. 



Graphis diversa Nyl. — Texas. 



Graphis lactea (Fee) Sprengl. — North America. 



Graphis radiata (Mont.) Nyl. — Texas. 



Graphis ramificans Nyl. — Maryland. 



Graphis scripta var. varia Ach. — Louisiana. 



Graphis subdiversa Nyl. — Florida. 



54. Phaeographis Mull. Arg., Flora 65:336. 1882. 



Thallus forming a thin, usually smooth crust upon the substratum, partly or 

 wholly within the substratum, devoid of differentiation into layers; apothecia linear, 

 curved, often branched, more or less immersed, the disk closed to open, commonly 

 black, the exciple colored like the disk, often surrounded by a thin to thicker 

 thalloid one; hypothecium hyaline to brownish black; hymenium hyaline; paraph- 

 yses unbranched, commonly distinct; asci clavate to cylindrico-clavate ; spores 

 4- more commonly 8, brown, oblong-ellipsoid, ellipsoid, or long-ellipsoid, 3-many- 

 septate, the cells lenticular. 



The algal host is Trentepohlia. 



A. Spores 3-5 -septate 



B. Spores constantly 3-septate 



C. Apothecia rarely branched 2. P. subfulgurata 



C. Apothecia much branched 



D. Thallus somewhat rough and minutely warty .... 1. P. tortuosa 



D. Thallus smooth 3. P. dendriticella 



B. Spores 3-5-septate 4. P. dendritica 



A. Spores 5-7- or 9-septate 



B. Apothecia round to irregular 5. P. punctiformis 



B. Apothecia more or less elongated 



C. Apothecia not more than 2 mm. in length 



D. Apothecia unbranched and straight 10. P. lobata 



D. Apothecia curved and more or less branched 



E. Apothecia much branched 6. P. intricans 



E. Apothecia infrequently branched 7. P. erumpens 



C. Apothecia 1-5 mm. in length 



D. Thallus greenish gray to whitish or pale olivaceous . . . 9. P. inusta 

 D. Thallus greenish gray to olive-brown 8. P. haematites 



1. Phaeographis tortuosa (Ach.) Miill. Arg., Mem. Soc. Phys. Hist. Nat. 

 Geneve 29:26. 1887. 



Graphis tortuosa Ach., Syn. Lich. 85. 1814. 



Thallus thin, smooth to somewhat rough and minutely warty, yellowish gray; 

 apothecia elongated, 0.5-2 X 0.1-0.2 mm., immersed, branched, much curved, 



