Fern and fern allies

Fern → whats dominant and semidependant?

In ferns, the dominant phase is the sporophyte, while the gametophyte phase is semi-dependent, typically living independently in moist environments but relying on the sporophyte for reproduction.

Structure

Rachis → are arrangements of leaflets

Pinnae→ leaves

Sori → collection of spores (sometime covered by indusium) 

Fern allies whats dominant and whats dependent ?

The sporophyte is dominant and the gametophyte is fully dependent

The three adaptations of fern allies

carinal canals → function in water conduction

vallecular canals → large, air-filled, intercellular spaces in the cortex

silica → overall protection

Prothallium

A small, heart-shaped gametophyte of ferns that harbors male and female structure of plant under the same structure.