All the surviving forms, however, have a completely established double system with the specific characters alluded to, and since there is every reason to believe that the conditions of evolution of the primitive Pteridophyte must have been essentially similar to those of the Bryophytes, the various
pteridophyte הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד