316 L’Abbé E. Coémans on the Cladonize 
after Dr. Nylander, who has seen the authentic specimens of 
Michaux. 
18. Cladonia baccilaris, (Ach.) Syn. p. 266 et hb. ejusd. 
The name Cladonia macilenta is now most generally used for 
this species. 
Amongst the Acharian varieties, the first three (styracella, 
carcata, and monocarpa) ought, in my opinion, to be neglected, 
as approaching too closely to the type. 
The var. clavata presents a modification more remarkable, and 
may be retained. 
The var. coronata is, according to the Acharian specimens, 
synonymous with C. polydactyla, Flk., as also another variety, 
designated in his herbarium under the name of Cen. baccilaris 
radiateformis. 
I have not discovered amongst the Cladonia macilenta of the 
herbarium at Helsingfors any specimen which is referable to 
C. Florkeana. Acharius therefore never knew this latter plant. 
Dr. Nylander has already remarked the resemblance between 
C. macilenta and digitata; and I am myself inclined to unite 
these two species, and to regard C. macilenta as only a variety 
analogous to C. pyxidata cornuta and fibula. The Ardennes, in 
Belgium, has, during the past year, furnished me with beautiful 
transitional forms between these two types. 
19. Cladonia digitata (L.), (Ach.) Syn. p. 267 et hb. ejusd. 
Of the five forms or varieties of this species mentioned in the 
Synopsis of Acharius, good examples are found in his herbarium, 
but they only prove that nowhere is the distinction of varieties 
less necessary than here. I therefore propose to erase the forms 
brachytes, denticulata, cerucha, cephalotes, and monstrosa, 
A specimen of C. deformis (from Sweden) is found intermixed 
with C. digitata in the Acharian herbarium. This collection, 
however, does not possess the intermediate forms passing into 
C. macilenta; but I have found them in the herbarium of the 
Museum of Finland, in the herbarium of Florke, and in great 
quantity on the rocks of the Ardennes. 
20. Cladonia deformis (Iu.), (Ach.) Syn. p. 268 et hb. ejusd. 
We may here also suppress the varieties crenulata, gonecha, 
and pulvinata, proposed by Acharius. 
21. Cladonia coccifera, (Ach.) Syn. p. 269 et hb. ejusd. 
Acharius is here more moderate in making varieties than his 
rival Florke; and for this he is deserving of praise. The only 
two varieties which he makes do not, however, deserve to be 
