*Note:* This question is a follow up to [this][1] question, and hence forms part of a bigger complex of questions about geology and biology in this certain scenario. --- *Meta:* The planet consists of **two enormous continents**, each encompassing one of the two hemispheres (northern and southern). There are two **small polar oceans** (both mostly frozen over, encompassed by landmasses) that are relatively low in salt. The continents are **divided by a huge, deep oceanic belt, along the equator** of the planet. The planet has bout **1.1 times the mass of *Earth***, and slightly more landmass than water (about 35% percent landmass to 65% waters). Tectonics push plates from the equator to the poles, effectively forming *mountain rings*, parallel to the equator, on the continents. The planet orbits at an *Earth*-like distance around and *Sol*-like sun with an *Earth*-like elliptical orbit. The planet will have **3 satellites** (aka. moons), the first is sized a trifle bigger than *Earth*'s moon and is orbiting along the equatorial axis about the same distance as earth's moon, and the others are both about 1/3rd the size of the big moon and are at a 60° and 70° degree inclination relative to the plane of the biggest moon at less distance from the planet. The planet will feature a Phlebotinum gas, providing about 400-500% the lifting capacity of helium/hydrogen (as described [here][2]). --- Regarding the stated facts, **How would flora develop and behave on such a planet?**. To mention a few topics: - How many species of a given plant (e.g. trees, wheat, grasses) would evolve? - Would there evolve different species per climate zone or would the same species rather evolve specializations? - How different could the flora on the northern hemisphere be from that of the southern? *Addendum:* This question assumes no travel of people between both continents, nor does it assume any cultivation of plants, no plantations made by humans. Best **assume NO humans** at all for the sake of the question. [1]: http://worldbuilding.stackexchange.com/questions/3598/how-would-tectonics-behave-on-a-two-continent-planet [2]: http://worldbuilding.stackexchange.com/questions/19630/is-this-concept-for-an-lta-gas-associated-element-lifecycle-feasible