"Botanical snakes" are

Apical growth of the lower vascular plants takes place by an apical cell. This cell is generally pyramidal. Though four-sided in shape,it is often referred to as a three-sided cell because

Brown hair found at the base of $Pteris$ leaves are:

Monoecious condition is found in

In pteridophytes,fusion of gametes takes place in

In $Dryopteris$,the placenta is the site of attachment for: