of the Herbarium of Acharius. 319 
this author intended by his Clad. symphycarpa. Nevertheless, 
as the young specimens of C. cariosa of which I have first above 
spoken were gathered in Sweden, and are the most ancient in 
the herbarium, it is reasonable enough to consider them the 
primitive types of Acharius. That which also confirms me in 
this opinion is, that the types of C. symphycarpa in the herbarium 
of Flérke, which have been compared with those of Acharius in 
the herbarium of Willdenow at Berlin, are precisely this small 
form of C. cariosa. Neither had Florke a clear idea of the 
typical symphycarpa, for he has intermingled his specimens with 
many different species, as I shall have to remark in my forth- 
coming work on the Cladoni@ existing in the herbarium of this 
author. 
I therefore regard the C. symphycarpa (Ach.) as only an in- 
significant form of Cladonia cariosa. 
31. Cladonia delicata, (Ach.) Syn. p. 274 et hb. ejusd. 
This plant is, in the Acharian herbarium, placed under Sée- 
reocaulon. Until 1824, Acharius had considered it a Cladonia, 
but im arranging his herbarium, after the publication of the 
Synopsis, he placed it under Stereocaulon, by inscribing on the 
old ticket Stereocaulon delicatum. 
This species is, in the estimation of most modern lichenolo- 
gists, only a variety of C. sguamosa; and I participated m this 
opinion until, during this summer, I had the opportunity of 
studying it better in the herbarium of Florke, at Rostock. I 
have never seen so many or such beautiful specimens. I then 
remarked the affinities of C. delicata to C. pityrea, and I am 
now convinced that the former is nothing more than a variety 
of the latter. In the monograph of the genus Cladonia which 
I am preparing I shall propose as a variety of C. pyaidata the 
C. pityrea with its two subvarieties delicata and cespititia. 
32. Cladonia botrytes (Hag.), Ach. Syn. p. 274 et hb. ejusd. 
This beautiful little species, so common in Sweden and in 
Finland on decaying fir-stumps, is very richly represented in 
the Acharian herbarium. 
33. Cladonia leptophylla, (Ach.) Syn. p. 274 et hb. ejusd. 
The herbarium of Helsingfors contains only two specimens of 
this variety of Cladunia cariosa—one from England, the other 
from Switzerland. The leaflets of their thalli are very small 
and very dispersed. 
34. Cladonia capitata (Mich.), (Ach.) Syn. p. 275. 
This species is neither found in the herbarium of Acharius 
