AUSTRALIAN AND SOUTH SEA ISLAND STICTACE^. 267 



It was apparently not known to Wilson that these lead-coloured 

 little plants were already described under the name of Dendrisco- 

 ■caulon filicinellum, and belong to an entirely different species of the 

 CoUemaceae group of lichens. I have recently discovered this 

 species in three different localities, and have recorded some par- 

 ticulars concerning them in the Proc. Linn. Soc, N.S.W., x.xxiv., 

 711 (1909). 



Some of the juvenile plants of S. stipitata were afterwards 

 forwarded by Wilson to J. Shirley, of Queensland, who communi- 

 cated them to Dr. Jean Miiller, of Geneva. It appears that no 

 indication of where they had been collected was given by Shirley, 

 and cLS a consequence Dr. Miiller naturally concluded they 

 were collected by J. Shirley in Queensland, and determined them 

 as a new species under the name of S. Shirleyana in " Hedwigia " 

 (1893), p. 122. 



The juvenile state of S. stipitata has some resemblance to S. 

 pedunculata, Krplhbr., as has subsequently been observed by 

 Miiller (Engler's " Jahrbucher," xxiii., 294 (1897), where he gives 

 the remarks, which may be translated as follows : — " The 

 numerous stages of development and branching, and the 

 variation of forms, make it clear that S. Shirleyana, which was in 

 1893 still imperfectly described from sterile specimens, belongs also 

 to S. pendunculata." 



In the Wilson collection of lichens now deposited in the 

 National Herbarium of Sydney there is a very line series of speci- 

 mens of S. stipitata in all stages of growth, and having seen speci- 

 mens of S. 'pedunculata from Fiji Islands, collected by J. Home in 

 1877-78, now in the Kew Herbarium, I can see no resemblance in 

 the adult plants. 



The adult plants of 5. stipitata are freely sprinkled with 

 apothecia, which are scattered all over the upper surface of the 

 thallus, and not marginal as is the case with 5. pedunctdata. The 

 spores of the latter species are described as being 1 — septate, 

 39-44 X 6-8 p, and are very different from those of S. stipitata, 

 which are 5 septate, 035 x 007 m.m. 



There is some resemblance between 5. stipitata and S. subca- 

 perata, and specimens of this latter species from Tasmania are 

 included by Wilson with his S. stipitata. 



S. Samoana, Miill.-Arg. in. |Rechinger, in " Bot. und Zool. 

 Samoainseln, dem Neuguinea-Archipel. und den Salomonsinseln " 

 (1907), p. 263 (67 repr.), Taf. II., fig. 4, somewhat resembles S. 

 stipitata, and may not be specifically distinct. I have not seen any 

 specimens of this latter species. 



5. variabilis, Ach. 



New Zealand : Ohakune (Cheel). 

 N.S Wales : Richmond River (Wilson, Nos 1855 and 1856), 

 Watts, No 11), East BaUina (Watts, No. 87), Byi'on Bay and 

 Mount Warning (Forsyth), Bullahdelah "(Cheel), Tum- 

 bulgum (Technological Museum, Sydney, No. 1916). 



