ROLL CALL 71 



Chakacteristics : Chlorophyll associated with carotin and xantlKjphyll; 

 marine or fresh water organisms, or inhabitants of moist hind; nucleus 

 and one or more chloroplasts present; starch synthesizeil in pi/rentmls; 

 plant composed of single cells, colony, filament, or plate of cells; most 

 species produce motile i-eproductive cells (zoospores) ; botli equal {iso-) and 

 different sized (hetero-) gametes present. 



Class III — Charophyceae — Stonewarts {Chara and Nitella). 



Characteristics: Vegetative body consisting of long, jointed stems with 

 whorls of short branches arising at joints {nodes) ; asexual spores absent ; 

 more complicated antheridia and oogonia than found in Thallophytes borne 

 along branches. 



Class IV — Phaeophyceae — Brown algae, kelps, rockweeds, sargassum {Lami- 

 naria, Fucus, Ulopteryx). 

 Characteristics: Multicellulate; exclusively marine ; brown color (due to 

 one or more brown pigments associated with chlorophyll) ; normally found 

 in intertidal zone. 



Class V — Diatomaceae — Diatoms (Meridion, Diatoma, Denticula Fragillaria). 

 Characteristics : Large group of unicellular algae ; related in color to 

 brown algae ; common as plankton organisms in both fresh and salt water ; 

 siliceous walls. 



Class VI — Rhodophyceae — Red algae {Nemalion, Polysiphonia, Phyllophora, 

 Corallopsis) . 

 Characteristics : Mostly marine ; characteristically reddish in color ; 

 branched, vegetative body filamentous and delicate; grow entirely sub- 

 mersed; cell wall often thick, gelatinous; color due to pigment, phyco- 

 erythrin ; no motile cells ; sexual reproduction highly specialized. 



Subdivision B — Fungi — Fungi, bacteria, and molds. 



Characteristics : Chlorophyll lacking; exist as parasites or saprophj-tes. 



Class I — Schizomycetes — Bacteria (Diplococcus, Staphylococcus, Streptococ- 

 cus, Bacillus, Bacterium, Spirillum). 

 Characteristics : Unicellular plants, usually without pigment, dividing in 

 one, two, or three planes; apparently structureless, but probably con- 

 taining a diffuse nucleus. 



Class II — Saccharomycetes — Yeasts (Saccharoimjces). 



Characteristics: Sometimes regarded as reduced Ascomycetes; single 

 cells with definite nucleus ; cytoplasm and sap cavity ; buds a.sexua!ly ; 

 under unfavorable conditions forms four spores, in a modified ascus. 

 Class III — Myxomycetes — Slime fungi, slime molds (Hemitrichia, Coma- 

 tricha, Trichamphora) . 

 Characteristics: Border-Hne plants; spores borne by fruiting bodies, 

 germinating into small, naked mass of protoplasm without a wall ; indi- 

 vidual cells fuse, forming a Plasmodium. 

 Class IV — Phycomycetes — Algalike fungi, molds, and bliglits {Saprolegnia, 

 Mucor). 



H. w. h. — 6 



