New modern plants, like conifers and fruit trees, started pushing cycads out, and the once proud population of E. Woodiis were reduced, and reduced, and reduced until there was possibly only one left.
But root pressure is not nearly great enough to push water to the tops of tall trees. Furthermore, the conifers, which are among the tallest trees, have unusually low root pressures.
Some trees, mostly evergreen conifers like pines or spruce, use solely this technique and keep their needle-like leaves unfrozen year-round with a super strong anti-freeze.
Elevation and latitude crosscut to form mazes of high-altitude grasslands, chilly black-green conifer forests, temperate rhododendron thickets, and subtropical lowland savannas.
Both types of trees produce less energy in the winter, but conifers have adaptations, such as a waxy coating to minimize water loss, that help them keep their needles year-round.
But fewer fires led to denser, more flammable forests, packed with the combustible needles of young conifers and the tinder-dry branches of dead or dying trees.
On the other end of the spectrum are plants that don't shed their leaves — for example, the pines, spruces, cedars and firs that make up the conifers, or evergreens.