74 BERNT LYNGK. M.-N. Kl. 



Nord/. S.ilidaicn (Somki'i.), I ladseløen (Nor<M.). 7"ro;;/.s. Ibbcstad (B. L.l, 

 Bardo: Innsct IB. L.), and Mtcvand-Dividalen (B. L.); Høiijdl (B. L.), Mikkel - 

 vik (B. L.), Skibotndalcn: Lulle (B. L.). Finm. Alten: Lille Lærrisfjord (B. L.l, 

 and Rautasvane (B. L.); Karasjok: Assebakte (B. L.); Nordkyn: Sandfjord 

 (B. L.); Tana: Vesterbugt (B. L.). 



Cladoiiia ccrvicorni^ is a variable plant. The squamules are well de- 

 veloped, but tbe podetia are frequently quite short and small, with small 

 plate-like scyphi and a short central prolification; in other specimens they 

 are better developed, squamulose or not, with two (or rarely three) series 

 of prolifications. The podetia are sometimes corticate, but quite as frequ- 

 ently maculate towards their base. Sommerfelt calls attention to the affi- 

 nity between C. vcrticillnta and C. degenerans (Tu. Fr. Lieh. Scand. I p. 84I. 



No colouring or occasionally a very faint one with KOH. In one 

 plant I have observed a violet colour (from traces of chrysophanic acid?). 



There is no great difference between this plant and C. verticillata, and 

 Wainio unites them into one species. But on the whole their habitus is 

 distinct^ an important point in a genus where the species are so extreme!}' 

 variable with respect to every special 'character' as in Cladonia. I think it 

 appropriate in this genus' to keep the species somewhat narrowly limited, 

 even if it is then difficult to point out one special decisive and distinctive 

 character, if not, 'fere omnes hujus Generis Species in unam confluerunt 

 et perturbatio in infinitum promoveretur' (Ach. Lieh. Univ. p. 5551. 



It varies very much as to the development of its squamules. They 

 may be large, incise, spreading, resembling CI. foliacca var. olcicornis, 

 distinguished through a more yellowish colour on the lower side, and the 

 dark rhizinae. On the coast it is occasionally more densely caespitose with 

 STialler squamules, approaching somewhat to CI. strcpsilis. This very 

 distinct species is, however, sufficient!}- characterized by the chemical reac- 

 tion (KOH + Ca C12 O2 blueish on the lower side of the squamules). CI. 

 inacrophyllodcs is a larger species wùth a characteristic black fumose colour 

 at the base of the lower side. 



At sunny places, on detritus, in dry heaths, on mossy maritime rocks, 

 and the like. 



A common species, evidently distributed throughout the whole country, 

 quite common at the south and west coast. It ascends to considerable 

 elevations, in Southern Norway at least to 14 — 1500 m. s. m. 



f. subcervicornis Waix. 



Vest/. Larvik: TjoUing (Høeg). 



Tronis. Bardo: Rokkomborre (B. L.). Finui. Lebesby (B. L.). 



Sandstede determined mv material. — Onlv these few stations recorded. 



