NOTICES OF NORTH AMERICAN FUNGI. 15 



512. ToYula sparsa. B. Sf C— Pulvillis miniitis sparsis ; floccis 

 sursum atteniiatis furcatis, articulis variis brevibusque. 



On pine wood. Car. Inf. No. 1477. 



Forming minute scattered tufts ; threads mostly attemiated 

 upwards, forked, frequently connate at the base ; joints variable, 

 sometimes oblong, sometimes wider than long. 



513. Bispoza atexxima. B. Sf R.— \j2ii& effusa aterrima ; floccis 

 brevibus ; articulis elipticis, 1-2 septatis. 



On oak rails. Car. Inf. Raveuel. 



Widely-spreading, jet-black ; threads short, articulations elliptic, 

 with one or two septa, -OOl-'OOS long, about Ij longer than broad. 

 At the base the mycelium is sometimes curiously lobed. 



514. Septonema breviusculum. B. Sf (7.— Tenue, effusum ; floccis 

 simplicibus ; articulis ellipticis, 1-2 septatis. 



On living bark of maple. Car. Inf. No. 4956. 



Forming a thin black stratum ; threads simple, consisting of 

 elliptic 1-2 septate joints, about '0006 long, l-|-2 as long as broad. 

 This is just intermediate between Bispora and Septonema. 



515. Septonema punctifozme . B. Sc C— Floccis fasciculatis e 

 macula orbicidari oriundis ; articulis 2-3 septatis. 



On leaves of Liriodendron. Car. Inf. No. 3805. 



Threads tnfted, springing from orbicular brownish spots ; thread 

 seated on a distinct hyaline pedicel ; articulations elliptic, •001--0005 

 long with from two to three septa, each division with a single nucleus. 



516. Septonema caespitosum. i?. 4- C— Floccis csespitosis, demum 

 furcatis, articulis oblongis triseptatis enucleatis. 



On leaves of Liriodendron. Car. Inf. No. 4941, 

 Not seated as the last on an orbicular spot, but forming groups 

 of various sizes, consisting of tufts of short threads ^Yithout dis- 

 tinct stems, and at length forked above ; articulations oblong when 

 mature, having three septa, withoiit any nuclei, -OOl-'OOOd long. 

 Closely allied to the last, but different in habit. 



517. Septonema obscuium. B. ^ C— Tenue sparsum ; floccis 

 simplicibus fragilibus, articulis angustis oblongis biseptatis. 



On dead wood. Car. Inf. No. 3852. 



Forming a thin stratum, which at first sight looks like an 

 Helminthosporium ; threads simple, brittle ; joints oblong, '0006 

 long, about four times longer than broad, without any distinct nuclei. 



* Septonema spilomeum. jB. 



On dead wood. Ohio. No. 92. Car. Sup. No. 221, 273, 

 302. New England. Russell. No. 5868 bis. 



518. Septonema radians. B. dk ^.—Floccis furcatis, articulis 1-3 

 septatis, commissuris constrictis. 



On living bark of beech. Car. Inf. Ravenel. No. 1399. 



Forming thin transverse black patches, consisting of short, 

 slightly branched threads ; joints consisting of from two to four 

 nearly globose cells, without any nuclei. 



