55. Graphina] IS. GRAPHIDACEAE 117 



rather narrow, 1-4 X 0.2-0.4 mm., partly immersed, curved or flexuous, the ends 

 pointed, rarely 1 or 2 times branched, the disk closed or slightly open and black, 

 the proper exciple black and obscurely striate, mostly covered by a thalloid one; 

 hypothecium hyaline; spores 8, ellipsoid, 7-13-septate transversely and 1-3-septate 

 longitudinally, 35-42 X 13—16 /x. 



On trees, near St. Martinsville. Louisiana. 



14. Graphina abaphoides (Nyl. ) Mull. Arg., Bull. Herb. Boiss. 3:46. 1895. 

 Graphis abaphoides Nyl.; Eck'f., Bull. Torr. Club 16:105. 1889. 



Thallus usually thin, ashy gray, smooth or finally rough and chinky, sometimes 

 subgranulose ; apothecia short to somewhat elongated, and rather wide, 1-3 X 0.4- 

 0.8 mm., partly immersed, becoming obscurely striate, straight, curved, or ob- 

 scurely flexuous, rarely branched bifurcately, the disk closed, the proper exciple 

 and hypothecium hyaline or tinged brown, the former covered by a prominent 

 thalloid one; spores 2-4, long-ellipsoid, 19-31 -septate transversely and 3-5-septate 

 longitudinally, 58-130 X 10-32 fi. 



On trees, Florida. 



15. Graphina Acharii (Fee) Mull. Arg., Mem. Soc. Phvs. Hist. Nat. Geneve 



29:38. 1887. 



Graphis Acharii Fee, Essai Crypt. 39. pi. 10, f . 4. 1824. Graphis rigida (Fee) 

 Spreng. 



Thallus thin, smooth to wrinkled and obscurely warty, greenish gray to whit- 

 ish; apothecia short to long, and of medium width, 1-8 X 0.2-0.5 mm., adnate, 

 straight to curved or flexuous. 1 or more times branched, the disk closed or nar- 

 rowly open and black, the thick proper exciple black, 2-3 times striate, covered 

 wholly or laterally by a thalloid one; hypothecium brownish black; spores 2-8, 

 oblong-ellipsoid, 19-31 -septate transversely and 2-5-septate longitudinally, 50-140 

 X 15-27 fi. 



On trees, Florida and Texas. 



16. Graphina subvirginalis (Nyl.) Mull. Arg., Bull. Herb. Boiss. 3:47. 1895. 

 Graphis subvirginalis Nyl.; Eckf., Bull. Torr. Club 16:106. 1889. 



Thallus thin, smooth to rough and chinky-areolate, greenish gray to whitish; 

 apothecia short to longer, but narrow, 1-4 X 0.12-0.3 mm., immersed to semi- 

 superficial, becoming variously curved and flexuous, and 1-several times branched, 

 the disk closed to open and brownish black, the proper exciple brownish, covered 

 wholly or laterally by a well-developed thalloid one; hypothecium hyaline; spores 

 4-8, ellipsoid, 13-27-septate transversely and 3-7-septate longitudinally, 36-64 X 

 9-15 fi. 



On trees, Florida. 



var. fulvescens (Nyl.) Mull. Arg., Bull. Herb. Boiss. 3:47. 1895. 



Graphis virginea var. fulvescens Nyl., Lich. Ins. Guin. 49. 1889. 



The disk reddish brown when open and reaching 0.6-0.7 mm. across, the exciple 

 rudimentary and pale brownish; spores 1 or 2, 11-31 -septate transversely, and 3- 

 11-septate longitudinally, 35-92 X 16-30 /x. 



On trees, Florida. 



17. Graphina mendax (Nyl.) Mull. Arg., Rev. Mycol. 10:177. 1888. 

 Graphis mendax Nyl., Ann. Sci. Nat. Bot. IV. 11:283. 1859. 



Thallus thin, dull white, smooth to minutely warty or granulose, finally 

 crumbling; apothecia somewhat elongated and of medium width, 2-4 X 0.3-0.5 

 mm., immersed, curved to flexuous, usually branched and often dendroid, the disk 

 soon open and pale to light brown, more or less whitish pruinose; the proper 

 exciple and hypothecium hyaline, the former surrounded by a thalloid one; spores 

 1, oblong-ellipsoid, 19-29-septate transversely and 5-7-septate longitudinally 65- 

 120 X 21-38 fx. 



On trees, Louisiana. 



