
TY  - JOUR
A1  - Stone, IG 
T1  - The ontogeny of the antheriduim in some Leptosporangiate ferns with particular reference to the funnel-shaped wall
JF  - Australian Journal of Botany
JO  - Aust. J. Bot.
Y1  - 1962
VL  - 10
IS  - 2
SP  - 76
EP  - 92
KW  - 
UR  - https://doi.org/10.1071/BT9620076 
N2  - An account of the ontogeny of the antheridium including some cytological details is given for some species of the Blechnaceae and Polypodiaoeae and for Polyphlebium venosum (R. Br.) Copeland, a member of the Hymenophyllaceae. In the species of Blechnaceae and Polypodiaceae which were examined the antheridium consists of three wall cells a discoid or columnar basal cell, a ring cell, and a cap cell-enclosing the androgonial tissue. The ring cell and cap cell are delimited by a wall which is laid down in the shape of a funnel. In Polyphlebium the antheridial wall typically consist's of four cells - a lower and an upper ring cell, a cap cell, and an operculum. Each ring cell is produced in a straightforward manner by a funnel-shaped wall. Davie's postulation concerning the development of the antheridium by a series of transverse walls and upward and downward expansion of the androgonial cell, giving the appearance of funnel-shaped walls and ring cells, has been included in text-books by Smith (1955) and Foster and Gifford (1959). This hypothesis is questioned, and an explanation of what is considered to be the true method of development of the funnel-shaped walls and ring cells in the fern antheridium is given. Anomalous antheridia of Blechnufm cartilagineum Sw., in which the androgonial tissue is flattened and abortive, form a deep cap cell and a ring cell separated by a funnel-shaped wall, although no expansion of the central androgonial cell takes place. The unusual method by which the pedicel and antheridial initial cell form from a cell of the filamentous prothallus in Polyphlebium is described. 
ER  -

