Seaweeds and Leaf-green 
The algze stand on the lowest level of plant life, whilst 
our flowering plants and ferns are the highest and best 
developed of all. 
And yet although their anatomy is quite different, 
there are very curious parallels between this water vege- 
tation and that of the land. 
The Fucus’ have root-like grasping fingers which take 
firm hold of the rock, and which seem to be distinctly 
sensitive to the touch of the stones. They have flexible 
tough stems and flattened leaf-like fronds. 
Yet neither root, stem, nor leaf correspond in any 
way to those of the higher plants. Some of the elegant 
little red seaweeds have a pretty arrangement which 
looks like the bark of a land plant, but in these the 
“bark” is a series of flattened rosette-like branches 
closely covering the central thread of cells. 
Moreover, these submarine plants have their parasites, 
and many small alge seem to be seldom found except 
upon some of the larger kinds, 
One of these is specially interesting, for it belongs to 
the algze, and yet it has lost every particle of chlorophyll, 
and grows as a pure parasite on a common red alga 
(Rhodomela subfusca).?8 
So it corresponds exactly with the sickly yellow or 
white dodders and toothworts, which are flowering plants 
without chlorophyll and parasites upon other flowering 
plants. 
1 Timiriaseff. 2 Usher and Priestley. ® Ewart. 
4 Jonnson. 5 Blackman. § Gaidukov. 
7 Murray. ® Warming. ® Lowenstein. 
10 Ewart, 11 Catterina, 12 Macfadyen and Rowland.,. 
13 Grafe, 14 Friedenfeldt. 15 Macfadyen. 
18 Kuster, 17 Schimper. 18 Borgesen. 
18 Chun, Karsten. 2° Reinsch. 21 Lohmann. 
22 Zacharias, Koford, Willkomm. 23 Moebius. 
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