RED ALG^. 207 



July. It is a summer amiual, of a fine lake-red 

 color, not over four, and usually not over two inches 

 high. 



The frond is cylindrical, one-eighth of an inch in 

 diameter, tapering much at the base, sometimes con- 

 stricted at intervals, and repeatedly and regularly 

 forking as it rises. The frond divides and subdivides 

 six or eight times, and finally ends in little forks, 

 hence its name. All the branches attain the same 

 length, so that the plant is "level-topped," and its 

 outline, when carefully laid out on paper, is almost a 

 perfect semi-circle. It adheres well, and must not 

 be subjected to too much pressure at first. The 

 ultimate branchlets are usually thickened a Uttle. It 

 makes an interesting and sometimes a beautifiil specimen. 

 It grows in deep water. 



Order.— GIGARTINEyE, 

 Qenus.— PBYLLOFBORA* Grev. 



The characteristic of the genus is a hard, cylindrical 



stem, considerably branched, from one to three inches 



long, and bearing upon the end of the branches a 

 small, wedge-shaped, red leaflet. 



• Pbyllophora = Leaf-bearing. 



