338 THE PLANT PHYLA 
Phylum VI. RHODOPHYCEAE. The Red Algae 
Red to purple filamentous to massive plants; marine 
Class 13. BANGIOIDEAE. Antherids and oogones developed 
from ordinary cells of plant body; 
propagation by monospores. Red or 
purple plants. (Sp. about 50, doubt- 
fully belonging here.) 
Order BANGIALES. One chloroplast in each cell. 
Family 1. Bangiaceae. Including the genus Por- 
phyra. 
Order RuopocHaETa.es. Several to many chloroplasts 
in each cell. 
Family 2. Rhodochaetaceae; 3, Campsopogonaceae. 
Class 14. FLORIDEAE. Red Seaweeds. Antherids and 
oogones specially developed; propaga- 
tion by tetraspores. Red or purple 
plants. (Sp. about 3,000.) 
Order NEMALIONALES. Lower Red Seaweeds. Mostly 
filamentous plants. Sporophores pro- 
duced directly from fertilized eggs. 
‘Fauily- 4. Lemaneaceae. 
Family 5. Helminthocladiaceae. Filamentous or 
parenchymatous, variously branched. 
—Batrachospermum, Nemalion. 
Family 6. Thoreaceae; 7, Chaetangiaceae; 8, Geli- 
diaceae. 
Order CrypToNEMIALES. Hard Red Seaweeds. Filiform, 
branched, often complanate; sporo- 
phores produced by remote auxiliary 
cells. 
Family 9. Gloiosiphoniaceae; 10, Grateloupiaceae; 
11, Dumontiaceae; 12, Nemasto- 
maceae; 13, Rhiziphyllidaceae; 14, 
Squamariaceae. 
Family 15. Corallinaceae. Filamentous, branched 
(and jointed) to crustaceous.—Coral- 
lina. 
Order CeRAMIALES. “‘Sea Mosses.” Filiform to folia- 
ceous plants. Sporophores produced 
by nearby auxiliary cells. 
