120 



L. I\()i.i)i:iu I" l{i)si.NviN(;i:. 



llu' ii[)i)er end iiMiiowor. Most ol' llu' s|)i'c'inK'ns wei-e dried, bul 

 some fraguuMils ;iic pruscivcd iii alcohol; one ol' these, which was 

 fruclifving, had a IhicUiiess of i;}() — 140//, another sterile was 77 — 

 üö//. thick. 



The outer cells are as a \u\c somewhal smaller than the inner, 

 and the structure thus most resembles thai ol' the lienus Panclaria 



Fig. 7. Piinctaria glacialis. A, part of frond seen from the surface ; tlie shaded 

 cells are sporangia. 200 : 1. ß— £, transverse sections of fronds with unilocular 



sporangia. 340 : 1. 



in the sense of J. Agardh (1896, p. 4). The frond is usually 4 lo 5 

 cells thick. The cells contain numerous small disc-shaped chroma- 

 tophores. 



Some plants contain rather numerous sporangia which are all 

 unilocular. Seen from the face they have nearly the same form 

 and size as the vegetative cells, or they are a little more rounded. 

 In transverse sections of the frond they appear often enlarged in- 



