The ovules of cycas are orthotropous and unitegmic.

Orthotropous ovules:
Orthotropous ovules are ovules that have a straight axis, with the micropyle (opening through which the pollen tube enters) and the hilum (point of attachment to the ovary) at the same end. In cycas, the ovules are orthotropous, meaning they have a straight axis.

Unitegmic ovules:
Unitegmic ovules have a single integument layer surrounding the embryo sac. The integument protects the developing embryo and provides nourishment. In cycas, the ovules are unitegmic, meaning they have a single integument layer.

Explanation:
Cycas is a type of gymnosperm, specifically a member of the cycad family. Gymnosperms are a group of plants that have naked seeds, meaning the seeds are not enclosed within a fruit. Cycas plants have reproductive structures called cones, which contain the ovules.

The ovules of cycas are orthotropous, meaning they have a straight axis. This is in contrast to anatropous ovules, which have a curved axis. In orthotropous ovules, the micropyle and hilum are at the same end of the ovule.

The ovules of cycas are also unitegmic, meaning they have a single integument layer surrounding the embryo sac. The integument provides protection and nourishment to the developing embryo. This is in contrast to bitegmic ovules, which have two integument layers.

Overall, the orthotropous and unitegmic nature of the ovules in cycas is characteristic of gymnosperms, including other members of the cycad family. This unique reproductive structure allows for the successful fertilization and development of the cycas plants.