Which one is not the feature of ?

The correct answer is: Archegonia is absent

The stems are unbranched in Cycas or branched in Pinus and Cedrus. In Cycas leaves reduced and usually once pinnate circinate. The male or female cones or strobili may be borne on the some tree (Pinus) or on different trees (Cycas). In Cycas the archegonia are embedded in the female gametophytes and open into the archegonia chamber