828 GLOSSARY. 



Pinnate^ when placed in a distichous manner, and 



resembling" the plumes of a feather. 

 Pencilled, rayed, like the finer strokes made by a 



pencil. 

 Quadrifarious, spreading- on four sides. 

 Secund, unilateral, arising on one side only. 

 Verticillate, whorled, when set in a circle round the 



stem or fronds 



Terms employed in describing the fructification of 

 the algcB^ the seeds of which consist of either 

 simple spores, or of others termed tetraspores. 



The former, for distinction's sake, ai'e termed 

 primary y and are generally included in conceptacles ; 

 the tetraspores, or secondary fi^uit, usually divide at 

 maturity, into four parts or sporules, and are g*ene- 

 rally placed in sori on the fronds, very rarely in 

 proper receptacles. 



Capsule, a case containing* spores. 



