45 



A. Branches with one or two cortical layers of cells. 



1. S. molliculum, Mitt. Leaves elliptic-oval, apex sub- 



truncate, minutely denticulate. Cheshunt. 



2. 5. cymbifolioides, C. Muell. Stem leaves oval; branch 



leaves truncate, toothed. Cheshunt. 



3. S. contortum, Wils. Leaves ovate-lanceolate, acute, 



sub-coriaceous. Key, No. 4. In bogs, Mt. Wel- 

 lington. Var. 2, laxum: var. 3, scorpioides • var. 4, 

 intermedium. 



4. S. compactum, Bbidel. Leaves ovate-oblong ; apex 



truncate, denticulate. In bogs, Huon Eiver. Var. y, 

 Huon River. 



B. Branches with three or more cortical layers of cells, without spiral 



fibres. 



5. S. cymbifolium, Dill. Cells of branches with spiral 



fibres. Wils. Bry. Brit. In swamp, New Norfolk. 



6. S. australe, Mitt. Leaves of branches ovate, obtuse. 



Near Huon River. 



7. S. confertum, Mitt. Leaves of branches ovate ; apex 



truncated, toothed. Near Cumming's Head. 



8. S. Nouo-Zealandicum, Mitt. Habit compact of S. 



cymbifolium, cortical cells without spiral fibres ; 

 cauline leaves obovate-lingulate, obtuse, denticulate. 

 Branch leaves ovate-acuminate. Mitt. Aust. Cat. 



3. PHASCITM, LrasriEus. 



Minute mosses growing on earth, named in allusion to the 

 bladdery appearance of the fruit. Key, No. 2. 



1. P. (Ephemerum) cristatum, Hook, and Wils. Leaves 



lanceolate, deeply toothed ; capsule immersed ; calyptra 

 campanulate. Cheshunt. 



2. P. (Astomum) cylindricum, Taylor. Tufty ; capsule 



elliptic, apiculate ; fruitstalk short ; operculum, 

 persistent ; calyptra cucculate or conico-campanulate. 

 In fields, Kangaroo Point. 



3. P. (Acaulon) apiculatum, Hook. fils. et Wils. Bud- 



form. Leaves obovate, acuminate, concave, apiculate, 

 the tip apparently secund. Cheshunt. Var, twgidum 

 Cheshunt. 



4. P. (Pleuridium) gracilentum, Mitt. Stem, Jin. high. 



Upper leaves much attenuated. Fruitstalk short. 

 Key, No. 2. West side of Tower Hill, Cheshunt. 



