ce= spore coat, cp= prothallial
cell, cr= rhizoidal cell, gg= oil bodies, r= rhizoid.
The germination of this species is of the Vittaria type (Nayar & Kaur 1968), as the first prothallial cell appears by means of a division that occurs perpendicular to the first rhizoid.
B: first stage of germination, with one rhizoid and a perpendicular first prothallial cell, 11 days.
The prothallial cell underwent periclinal divisions giving rise to 2-6-cell-long uniseriate filaments.
Plate phase formation began between days 20-40 with an orientation change in the division plane of the apical cell, showing a variation in the prothallial development pattern.
Hair abundance varies among species and depends on the stage of prothallial development.
On the prothallial
development and prothallium of Dryopteris varia O.
TABLE 1 Comparison of diferentes stages of the prothallial
development of Arachniodes denticulata with other genera and species of Dryoteridaceae.