An imperfect representation of this plant has already been 
given in our first volume (Tab. XX. Fig. 2, 3, 4,) where it was 
regarded as a variety of Phyllophora Brodiai, according to the 
views of most British botanists. In the last edition of the 
‘Manual’ I have recognized its specific existence under the 
name here given, a name adopted from Prof. J. Agardh, who, 
in a recent letter, points out particularly the characters which 
distinguish this little plant from the original P. Brodizi. These 
characters are,—the position of the sorus of tetraspores; the 
brighter colour of the frond; and the much more widely ex- 
panded root. To these I would add a marked difference in its 
geographical distribution; for while P. Brodizi is confined to 
our northern shores, P. palmettoides is a native, in this country, 
only of the south of England, and, on the continent, is found in 
the Mediterranean. 
Fig. 1. Fronds of PuyttopHora Patmetrores :-—the natural size. 2. Frond- 
let with a sorus in the centre -—slightly enlarged. 3. Tetraspores, from 
the same. 4. Thin slice of the frond, to show structure :—Joth highly 
magnified. 
