of the Herbarium of Acharius. 819 



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 Florke, 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 Cladonia 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 Ste- 

 reocaulon. Until 1824, Acharius had considered it a Cladonia, 

 but in 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. squamosa; and I participated in 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 pyxidata the 

 C. pityrea with its two subvarieties delicata and ccespititia. 



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 Cladonia 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 



