118 A TEXT-BOOK OF BOTANY 
feet) that swells at the end into a large globular float, to 
which are attached leaves often ten or twelve feet long 
(Fig. 109). The sea-palm has a thick erect stem that bears 
a crown of large drooping leaves (Fig. 110). 
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Fic. 109.—A bladder kelp.—After Postezts and Ruprecnar. 
Another group of brown Algee is represented by the rock- 
weeds (called also wrack) and the gulfweeds. The former 
(mostly Fucus) cover the rocks between tide-marks, being 
ribbon-like forms repeatedly forking at the swollen tips 
