BIO 201: Botany

SEEDLESS VASCULAR PLANT LIFE CYCLES

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Division Lycophyta

Lycopodium life cycle

1. Sporophyte plant
    a) stobilus

2. Vascular bundle

3. Strobilus
e) Sporophyll
    f) Sporangium

4. Detail, sporangium
    g) Spores

5. Gametophyte

6. Detail, gametophyte
    k) Reproductive structures

 

Division Lycophyta

Selaginella life cycle

1. Sporophyte plant

2. Strobilus

3, 9. Sporophyll

4, 8. Sporangium

5. Microspores

6. Male gametophyte

7. Sperm

10. Megaspores

11. Female gametophyte

12. Archegonium

13. Egg

14. Zygote

15. Young sporophyte

 

Division Sphenophyta

Equisetum life cycle

1. Sporophyte plant

2. Strobilus

3. Sporangium

4. Spores

5. Antheridium

6. Sperm

7. Male gametophyte

8. Female gametophyte

9. Archegonium

10. Egg

11. Zygote

12. Young sporophyte

 

Division Polypodiophyta

Fern life cycle

1-2. Fern frond

3. Front x.s.

4. Sprangium

6. Spore

7-8. Prothallus = gametophyte

9. Archegonium

10. Antheridium

11. Rhizoids

12. Sperm

13. Egg

14. Zygote

15. Young sporophyte