A Synopsis of Plant Phyla 17 



Ph3'lum VI. CARPOPHYCEAE. The Higher Algae. 



Plants aquatic, from filamentous to erect, well differentiated 

 stems, which are rooted below and sometimes bear flat, leaf-like 

 structures; propagation by non-motile tetraspores, or by simple 

 fragmentation of the plant body; generation by heterogametes, 

 the fertilized tgg developing into one or more (often many) 

 spores, which are enclosed in a sterile tissue, the whole consti- 

 tuting a primitive fruit. In addition to chlorophyll most plants 

 of this phylum, nearly all of which are marine, contain phycoe- 

 rythrin in their cells. This is not the case, however, with the 

 plants of the class Charoideae, which are mostly inhabitants of 

 fresh waters, and are of a bright green color. 



Class 12. BANGIOIDEAE. Antherids and oogones devel- 

 oped from ordinary cells of the plant body by a slight enlarge- 

 ment, the former producing non-ciliated sperms, and the latter 

 scarcely differentiated single eggs ; no trichogyne. Red or purple 

 plants. 



Order Bangiales. Plants filamentous or stratose ; propaga- 

 tion by monospores (undivided tetraspores) ; chromotophore one 

 in each cell, stellate. 



Family i. Bangiaceae. Composed of a few genera, and from 

 forty to fifty species, including the edible "laver" (species of 

 Porphyra). (Pf. I, 2, 307.) 



Order Rhodochaetales. Plants filamentous, erect, branched ; 

 propagation by monospores ; chromotophores several to many in 

 each cell. 



Family 2. Rhodochaetaceae. Filaments not corticated. But 

 one genus, Rhodochaete, containing a single marine species. (Pf. 

 I, 2, 316.) 



Family 3. Campsopogonaceae. Filaments corticated. But one 

 genus, Campsopogon, containing a few freshwater species. (Pf. 

 I, 2, 318.) 



Class 13. FLORIDEAE. Antherids composed of definite 

 groups of cells, superficial or on branches, producing non-ciliated 

 sperms ; oogone a single cell prolonged above into a long fine 

 hair, the trichogyne, and containing a definite Q^g in its base. 

 Red or purple plants. 



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