630 



A. HESSELBO 



to the meiidional group — are not included in the present or fol- 



lowing sections. 



Table I. The Plant-geographical Groups. 



Of greatest interest in this connection is the comparatively large 

 group of mer id ion al species, which comprise abont Ve of all the 

 species. According to their distribution in the different districts of 

 Iceland they can be divided as follows: — 



a. Found only in the Southern part of Iceland (South Iceland 

 and most nearly adjacent parts of South-east and South-west Iceland). 



Reboulia liemispliærica. 

 Fegatella conica. 

 Fossombronia Dumortieri. 

 Aneura nuiltifida. 

 Marsupella Fiinckii. 

 Jamesoniella autuninalis. 

 Lopliozia excisa. 

 Lopliocolea cuspidata. 

 Lepidozia setacea. 

 Frullania fragilifolia. 

 Lejeunea cavifolia. 

 Sphagnum papillosum. 

 Weisia crispata. 



— viridula. 

 Trichostomum littorale. 

 Barbula unguiculata 



var. cuspidata. 

 Tortula muralis. 



— mucronifolia. 



Hedwigia albicans. 

 Orthotrichum anomalum. 



— saxatile. 



— cupulatum. 

 Mnium undulatum. 

 Leucodon sciuroides. 

 Anomodon viticulosus. 

 Thuidium tamariscinum. 



— Philiberti. 



Isotliecium myurum. 

 Scleropodium purum. 

 Eurhyncliium piliferum. 



— Swartzii. 



— Stoclvesii. 

 Rhyncliostegium murale. 

 Plagiotliecium depressum. 



— elegans. 

 Amblystegium fluviatile. 

 Hypnum molluscum. 



b. Most common in South Iceland, rarer in the other parts of 

 the island. 



Madotlieca Cordæana. 

 Barbula cylindrica. 

 Mnium serralum. 

 Catharinea undulata. 

 Neekera complanata. 



Tliuidium delicatulum. 

 Thamnium alopecuruni. 

 Rhynchoslegium rusciforme. 

 Camptotlieciuni lutescens. 

 Hj'pnum commutatum. 



