Puget Sound Marine Sta. Pub. 



Vol. 1, No. 1 



the stripe was cut off just below the bulb, and a cork fitted into the 

 opening to prevent the water from getting into the bulb ; on some a mere 

 fringe of the bulb was left at the point from which the fronds were 

 growing and to which an anchoring string could be attached; from some 

 the fronds were cut off close to the bulb and anchored to a raft. In all 

 these cases the part of the plant experimented with remained healthy and 

 grew ajjparently as well as the firmly anchored plants. Table 1 shows the 

 first three measurements of such plants, taken within nine days. 



Table 1. Showing growth of laminae of free floating plants. 



Attachment of Plant 



Naturally on rocks at bottom 

 of bay 



Whole plant witli holdfast 

 tied to naturally attached 

 plant 



Basal three feet of stalk re- 

 moved, remainder tied to 

 other plant 



More than half of stalk* re- 

 moved, remainder tied to 

 other plant 



Stipe cut off below bulb, re- 

 mainder corked and tied to 

 other plant ■ 



Mere fring'e of bulb left at 

 frond base, tied to other 

 plant 



All of stipe removed, fronds 

 anchored to raft 



Daily 

 rate of 

 growrth 



1.81" 



2.25" 



.125" 



.175" 



1.375" 



1.6" 

 1.75" 



*Young plants. 



The plants grew at rather a rapid rate, varying with the length, 

 from one eighth of an inch to two and one fourth inches daily. We con- 

 cluded therefore that for convenience at least part of the work could be 

 done on kelps attached to a raft free from the entanglement of other kelp 

 in a large bed. 



Table 2. Showing grotvth of different lengths of fronds left attached 



to bulbs. 



*Young plant. 



