BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
Vol. XILl November. 1885. [No. I I 
New North American Arthoniae. 
The learned Dr. Nylander of Paris has had the goodness to examine 
a collection of North American ArtJio?iim sent him by me, and has 
published the descriptions of several new species in Nos. i6 and 24 of 
the.Regensbiirg Flora of the present year, and which are here repro- 
duced for the benefit of our lichenists"! 
I have to regret that Dr. Nylander was prevented by ill health 
and his numerous occupations from determining all the specimens 
sent him, but I am not without hopes that he may yet find himself 
able to do so. As being, as it were, the creator of the genus, no one 
else is so capable as he. 
I would observe that A. pyrrJniliza^ Nyl., has been distributed as 
A.^pyrrhula, which, from the description, is quite a different plant Of 
this, those with whom I have made exchanges will please take 
notice. — H. Willev. 
r 
^ Fastidiosum sane est novas species describere et infinitas ita min- 
uties videri confusas exhibere. Sed non prsetervideatur in scriptis 
prsesertim hodiernis anatomicis vel physiologicis etiam multo magis 
prodiens nisus res minutulas inutiles amplissime prolixissimeque 
enarrare minutissimaque acriter consectari, ita ut meritum evadat pro- 
lixitas. 
Novae species exposit^e parvi sunt momenti nisi ubi addunt notas 
ad alias species jam cognitas satius distinguendas et ubi constituendo 
systemati utiles sunt; unde sequitur, nullas descriptiones esse bonas 
sine additione notarum talium comparantium et simul descriptores 
parum cognitionibus generalibus methodoque optima initiatos vix 
descriptiones ullas rite facere valere. 
Hie seriem incipimus Arthoniarum Americae borealis, quas sub- 
misit prsestantissimus H. Willey. 
1. Arthonia sanguinea^ Will. — Thallus vix ullus; apothecia obscure 
sanguinea, superficialia, oblonga vel subrotundata (latit. circiter 0.5 
), convexula intus obscura; sporae 8nas incolores ellipsoideae mu- 
rali-divisae, longit. 0.022 — 30™"^*, crassit. o.oii — 14™""- lodo gel- 
atina hymenialis ccerulescens, sporae fulvo- rubescentes. 
In California super corticem et lignum. _ Species mox distincta 
colore apotheciorum. Maxime accedens sit A, disiendens, Nyl., e 
Cuba (inde a C. Wright data n^' ^54 et 156), cui apothecia nigra et 
sporae multo majores (longit. 0.073— 90°'"'*, crassit. 0.024—27"^*) 
2. Arthonia xylographica, Nyl— Thallus macula pallescente indica- 
tus; apothecia nigra adpressa lanceolato-dififormia (latit. circiter 0.25 
mm. 
