|
S.No. |
Character |
Pteridophytes |
Gymnosperms |
|
1 |
Habitat |
Hygrophytes (i.e. grow in moist and shady places). |
Xerophytes (Grow where the water supply is scanty.) |
|
2 |
Root |
Adventitious roots |
Tap Root |
|
3 |
Vascular cambium |
Absent |
Present |
|
4 |
Archegonium |
Neck canal cell, venter canal cell Present |
Gymnosperms do not completely lack archegonia. They are generally present, except in Gnetales. |
|
5 |
Water |
Essential for Fertilization |
Not necessary |
|
6 |
Microspores and Megaspores |
Not all pteridophytes produce both microspores and megaspores. Many are homosporous. |
Microspores are shed for a short time from microsporangia
and the megaspores are permanently retained within megasporangia |
|
7 |
Pollen tube |
Absent |
Present |
|
8 |
Ovule | Absent |
Present |
|
9 |
Seed |
Absent |
Present |
|
10 |
Gametophyte |
Independent of the sporophyte |
Dependent on the sporophyte. |
