THE MARINE BOTANIST. 265^ 



SEIROSPOEA GRIFFITHSIANA.— 

 GRIFFITHS' SEIROSPORA. 



Stem two to six inches high, setaceous, generally 

 undivided; more or less opaque and veiny^ set with 

 numerous sub-distichous, long", simple, alternate 

 patent branches, the lowest of which are longest, 

 giving the plant, when displayed, a broadly ovate 

 outhne ; the largest frequently bearing a second set 

 of similar branches. This beautiftd plant has the 

 aspect, and many of the microscopic characters 

 of strong specimens of Cal, corymhosum, but is at 

 once distinguished by the fructification ; the tetra- 

 spores in Seirospora being formed out of the 

 terminal ramuli themselves, the whole ramulus 

 becoming converted iato a string of bead-like 

 tetraspores." — Harv., Man., Ed. 2nd, p. 171. 



Grows on rocks and algae, in from four to five 

 fathom water. Very rare. Torquay. Salcombe. 

 Torpoint, Plymouth. Roundstone Bay, Galway. 

 Portaferry. 



