224 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



phores are thread-like, shorter or longer, and irregularly sinuated 

 (Fig. 210 B, E, F). 



I have found plants with tetraspores, antheridia and cysto- 

 carps, which all occur on separate individuals. 



The tetraspores _^are sessile on the uppermost and inner 

 side of the mother-cells (Fig. 210 B, C), when young they 



are oval or obovate, when 

 quite developed nearly spheric- 

 al; they are commonly tetra- 

 hedrally divided more seldom 

 cruciately (Fig. 210 C). 



The cystocarps are com- 

 posed of two oppositely-placed 

 gonimoblasts, which, when ripe, 

 consist of the ramified monili- 

 form threads of the uniseriated, 

 nearly spherical carpospores 

 (Figs. 209, 211 A) ; the latter 

 are about 40 — 42 /i broad. 

 These peculiar seirosporic cysto- 

 carps agree very well, apart 

 from the form and size, with 

 those found in Seirospora 

 Griffithsiana Harv. and which 

 BoRNET was the first (Notes 

 algologiques, I (1876) p. XIV) 

 to explain as cystocarps in 

 contradistinction to the para- 

 spores (seirospores) also occur- 

 ring in this plant. 



Fig. 211 C shows a procarp. 

 1 have only succeeded in find- 

 ing remains of the trichogyne, it 

 seems to be very short-lived as 

 Schmitz (1. c, p. 280) also men- 

 tions being the case in Seiro- 

 spora interrupla (Engl. Bot.). Most probably this is the reason 

 why BuFFHAM^) has not detected the trichogynes in plants examined 

 by him. 



1) BuFFHAM, T, H., On the reproductive organs, especially the Antheridia, 

 of some of the Floridese. (Journal of the Queckett Microscopical Club, 

 Vol. IV, Ser. II (1891) p. 252). 



Fig. 212. Seirospora occidentalis Borgs. 



Part of a plant with paraspores. 



(About 125:1). 



