314 L’Abbé E. Coémans on the Cladonize 
from Central France, and one of C. cenotea, from the Pyrenees, 
are marked, by the hand of Acharius, Cen. gonorega virgata, 
and Cen. gonorega vetusta. C. squamosa is also intermingled 
with the forms scabrosa and gracilescens. Lastly, three speci- 
mens, branched and tortuous, of C. furcata are ticketed Ceno- 
myce gonorega? var. palmacea; and a small specimen of C. 
amaurocrea from Switzerland is also marked Cen. gonorega. It 
is very difficult to understand how the learned lichenographer 
could possibly have united all these species with C. degenerans. 
14. Cladonia peltasta, (Ach.) Syn. p. 261 et hb. ejusd. 
The Acharian herbarium contains only one specimen of this 
rare species, gathered in the Isle of Bourbon and received from 
Bridel. The specimen has been partially removed, but sufficient 
still remains to recognize the characters of the species. 
Acharius has erred in placing this Lichen amongst the sey- 
phiferous lichens: its proper position is near to C. rangiferina. 
15. Cladonia ecmocyna, (Ach.) Syn. p. 261 et hb. ejusd. 
This species is now more generally known as Cladonia gracilis. 
As in other species, so here also, many of the Acharian varie- 
ties are of too little importance to be retained: e. g. amaura, 
floripara, leucochlora, valida, elongata, and exoncera. 
The var. corymbosa, Ach. (Syn. p. 263), does not belong to 
C. gracilis, but to C. furcata, as Dr. Nylander has already re- 
marked, and as the Acharian herbarium confirms. 
Making the var. hybrida (Ach.) the type of the species, four 
forms or principal varieties may be distinguished, viz. :— 
The form chordalis (gracilis, Ach.) for plants which are slen- 
der, subuliform, or with narrow scyphi. 
The form macroceras, to characterize those robust and gigantic 
forms which attain, in arctic or alpine localities, to 25 centims. 
in length. 
The form aspera, to designate folioliferous specimens with 
crisped, lacerated scyphi, and which remind us, by their general 
appearance, of the var. trachyna of C. degenerans. 
Lastly, the form cornuta, to indicate those forms which have 
the upper portions of the stems subpulverulent, and which have 
heretofore constituted a separate species under the name of 
Cladonia cornuta, Fr. 
The incorrect determinations observable in the Acharian 
herbarium are as follows :— 
1. Under the name of C. ecmocyna a. gracilis are found some 
specimens of C. furcata, var. surrecta, Fk. (from France), and 
three others of C. pyazdata cornuta (from Switzerland). 
