Young But Wild
The prothullas is a food storage and nutrients to sustain the young sporophyte fern development as it matures.
After fertilization the sporophyte embryo starts to emerged from the underside of the notch of the prothullas.
when the sporophyte embryo starts to developed parts of its anatomy of the fern, such as the foot, roots, fronds and leaves.
The leaf of the sporophyte fern will looked flat, because it is underdeveloped, by the second and third leaves emerges start to show the characters of the Angiopteris evecta leaves.
The rhizoids roots of a sporophyte ferns are very fine and fragile, when transplanting is a very complex process.