Cycads male cones

Experiments show that insects can function as pollinators of cycads, rare, palmlike tropical plants. Furthermore, cycads removed from their native habitats—and
therefore from insects native to those habitats—are usually infertile. Nevertheless, anecdotal reports of wind pollination in cycads cannot be ignored. The structure of cycads male cones is quite consistent with the wind dispersal of pollen, clouds of which are released from some of the larger cones. The male cone of Cycas circinalis, for example, sheds almost 100 cubic centimeters of pollen, most of which is probably dispersed by wind. Still, many male cycad cones are comparatively small and thus produce far less pollen.

Digital Academy: RC-10
The passage suggests that which of the following is true of the structure of cycad cones?_??_GRE_???

Hi,
One native English speaker told me that the blue part is grammatically wrong and it should be:

The structure of cycads' male cones ... (cycads' with an apostrophe)
or
The structure of cycad male cones ... (without--the noun acts as an adjective)

Do you agree with him?

Thank you.