37 
229. A. melaspora, Tuck. Thallus white, effuse, powdery. 
Apoth. innate, rounded, oblong or difform, plane, suffused with the 
thallus. Spores oblong-ovoid, 4-6 locular, the upper cell largest, 
very dark brown and almost black, .022-27 by .010-13 mm. Reac¬ 
tion blue. — Tuck, in hb. Sprague. Willey Suppl, p. 54. — On dead 
wood, Florida, Miss Wilson. 
230. A. aspersa, Leight. Thallus greyish-green, thin, indeter¬ 
minate. Apoth. numerous, rounded and variously difform, depressed 
or plane, within dark. Spores ovoid-oblong, 4 locular, .013-15 by 
.006 mm., the upper cell largest. Reaction blue. — Ann. Nat. Hist., 
j856 ,p. 332 andi. 11 /. 11-15, Gr. Brit., p. 395, Almq.,p. 41.— 
Europe. 
231. A. pinastri, Anz. Thallus inconspicuous. Apoth. innate, 
rounded or oblong, appressed, plane or convex, greyish pruinose. 
Spores-.— Comm. Soc. Critt. ftal. 1862, p. 159, exs. Etr., n. 34. 
A. neglect a Bagl. in Rab. Exs., n. 670, fide Almq., p. 63.—On pine, 
Italy; and Nyl. has referred here provisionally a plant on white pine, 
New Bedford, in which the spores are 4 locular, .016-22 by .006-9 
mm. 
232. A. reniformis, (Pers.) Ach. “ Thallus olivaceous. Apoth. 
subreniform.”— Opegrapha Pers. Ann. 1794, p. 31. Arthonia Ach. 
L. U.,p. 146, Nyl. Flora 1867, p. 330. Am. Flora 1884, p. 647, 
Lamy, p. 152. A. obscura (Pers.) Ach. L. U., p. 146, in Hepp 
Exs., n. %()j,pde Stitz. Helv., n. 1095. The spores of Hepp’s plant 
are 6 locular, .013-20 by .003-4 mm.—Nyl. has referred here a plant 
on white pine, Pennsylvania, in hb. Eckfeldt, in which the thallus is 
thin, white, the apoth. appressed, rounded or oblong; spores 6 loc¬ 
ular, .018-23 by .006-8 mm. 
233. A. gyrosa, Ach. Thallus inconspicuous, limited by a dark 
line. Apoth. appressed, crowded, difform, obsoletely gyrose ru¬ 
gose. Spores ovoid, 6-(8) locular, .013-17 by .005-6 mm. Reac¬ 
tion yellow.— L. U.,p. 144, Syn., p. 5, Nyl. Arth., p. 96, Mass. 
Ric., p. 51.—Europe. 
234. A. subgyrosa, Nyl. Thallus thin, white. Apoth. de¬ 
pressed, rounded or difform, somewhat gyrose-insculpted or rugose 
and torn, within dark. Spores oblong-ovoid, 4 locular, .015 by .006 
mm. Reaction from blue vinous red .—Flora 1869, p. 72.—Bengal. 
235. A. glaucella, Nyl. Thallus thin, white. Apoth. crowded, 
small, difform, macular, uneven, plane, the older ones lobate-dis- 
joined, thinly grey-pruinose. Spores oblong, .016-18 by .005-6 
mm. Reaction blue.— Arth., p. 97. — Germany. 
