222 



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



Seirospora Harvey. 



Seirospora occidentalis Børgs. 



Børgesen, F., Some new or little known West Indian Florideæ (Bot. 

 Tidsskr. vol. 30, 1909, p. 14). 



This interesting plant (Fig. 209) was found among the above- 

 mentioned Callithamnion cordaium as an epiphyte upon Gracilaria 

 Blodgettii. 



Fig. 209. Seirospora occidentalis Borgs. Part of a female plant. 



(About 70 : 1). 



The plant is much ramified and forms small, dense bushes 

 about 1—2 cm. high. 



The main stem is fastened to the host plant by means of 

 short, thick-walled rhizoids emerging from the lowermost cells 

 (Fig. 210 A). The cells found here are short, nearly as long as 

 broad, about 200// thick having very thick walls (the wall ca. 

 40/^ thick). 



