The classification of algae explains about the Morphological and physical features

1. Algae

2.  International code of botanical nomenclature
certain suffixes
 phyta-division
 phyceae-class
 phycideae-subclass
 ales-order
 inales-suborder
 aceae-family
 oideae-subfamily
 Greekname fr genus
 Latin name fr sps

3.  Pigment constituents of the cell
 Chemical nature of stored food materials
 Kind,number,point of insertion and relative
length of flagella
 Chemical composition of cell wall
 Presence or absence in the nucleus of the cell

4.  Myxophyceae
 Chlorophyceae
 Xanthophyceae
 Chrysophyceae
 Bacillariophyceae
 Cryptophyceae
 Dinophyceae
 Chloromonidineae
 Euglenineae
 Phaeophyceae
 Rhodophyceae

5.  Fresh water forms
 Simple thallus
 Bluish green in color
 Cells lack nucleus
 Photo synthetic products are polysaccharide
and glycogen
 Sexual reproduction is absent
 Motile cells are not produced

6. Chlorophyacae (green algae)
Mostly fresh but few marine
Green colour
Presence of chlorophyy a and b
Xanthophylls an d caretonoids
Reserved food material is starch

7. Xanthophyceae
Yellow green colour due to excess
of xanthophylls
Fresh water,few marine
Pyrenoids are absent in
chromatophore
Oil is reserved food material

8.  Marine and fresh water
 Thallus is brown or orange
 Ancessory pigment phycocrysin
 Reserved food material is oil and leucosin

9.  Fresh water and marine
 Diverse colour(brown,red,olive green,bluish
green)
 Starch is reserved food material

10.  Unicellular and motile
 Biflagellate and sculptured cell wall
 Resered fod material is starch and fat

11.  Bright green in colour
 Excess of xanthophylls
 Numerous discoid chromatophores
 Reserved food material is fat

12.  Unicellular an d motile
 One or two flagella
 Fresh wate or saline habitats

13.  Mostly marine
 Brown colour
 Complicated and organised thalli
 Common name sea weeds
 Reserved food material is alcohol and
polysacchrides

14.  Marine and fresh water
 Colour red or dark red
 Accesory pigmentsc-phycocyanin and r-
phycoerythin
 Reserved food material is floridean starch.

15.  Known as diatoms
 Fresh water and marine
 Diatomin as principle pigment
 Yellow or golden brown in color
 Cell wall partly silicified and partly pectose