MYXOPHYCEAE 



(Cyanophyceae. Schizophyceae) 

 The Blue-Green Algae 



Algae typically blue-green, the coloring matter being a mixture of 

 two pigments, chlorophyll and phycocyanin; pigments of other colors 

 sometimes present. 



Plant body unicellular or multicellular, sometimes endowed with a 

 peculiar motion; plants existing usually in gelatinous masses, sometimes 

 solitary among other algae. 



Reproduction always asexual, either by simple cell division in one, two 

 or three directions of space, or by means of hormogones (multicellular 

 fragments of the plant body, at first motile, afterwards coming to rest), or 

 by means of non-motile gonidia formed within gonidangia, or by means of 

 resting gonidia (formed from ordinary cells). 



Habitat: Plants found in fresh, brackish or salt water, in hot springs, 

 in mineral springs, in aerial situations, or as endophytes. 



Order I. Coccogoneae. Plants unicellular, single or associated in 

 families or colonies which are usually surrounded by a copious gelatinous 

 integument, rarely forming filaments; reproduction occurs commonly by 

 the vegetative division of cells, rarely by the formation of non-motile go- 

 nidia from the division of the contents of a gonidangium (mother cell). 



Order II. Hormogoneae. Plants multicellular, filamentous, attached 

 to a substratum or free-floating; filaments simple or branched, usually 

 consisting of one or more rows of cells within a sheath; reproduction 

 occurs by means of hormogones or resting gonidia. 



Order I. COCCOGONEAE 



Family I. Chroococcaceae. Plants showing no difference between basal 

 and apical regions, solitary or associated in families or colonies; 



