Ryll's plantlife is rich and varied, shaped how it is by two forces - natural evolution and selective breeding and magical manipulation by the kiarrcats themselves. Here are just a few examples.
Aauroun Tree
Aauroun trees are found in Hrimroul's desert regions and are superbly adapted to the dry climate. Aauroun trees live in slow motion, metabolising and growing slowly and taking centuries to reach their full size. They have short, broad trunks that contain stores of water that the tree can survive on for decades at a time. This water is protected by an extremely thick and unpalatable bark to deter would be grazers. An aauroun tree's leaves are long and leathery, growing atop of twisted branches. The local Desert kiarrcats use them as a source of shade and also water, but are careful never to take too much so as to avoid harming the tree, so it will be there for the future. Aauroun trees can live for may thousands of years, and many of them are given names by the local Desert clans, serving as landmarks for their long journeys through the wastes. Some believe them to be a form of protector spirit, guiding travellers through a dangerous land.
Greenmount
These are by far the biggest trees on Ryll. Greenmounts are common in the temperate forests of Rouen and northwest Hrimroul, and the inhabitants are able to carve their homes directly into the trunk without harming the trees as they are so large, though they must be careful not to weaken the structure. A greenmount has a tall, straight trunk and a very deep root system to anchor the tree in place. Their leaves and branches are very high up, in the distant canopy, so the forest floor in a greenmount wood can be surprisingly open, like a cathedral made of trees. As well as being the tallest trees on Ryll, greenmounts are one of the longest lived species, though they beaten by the desert growing aauroun tree. Nevertheless they grow very slowly, and can live for centuries - possibly even thousands of years.
Lightgrass
This is the name given to several varieties of bioluminescent grasses that grow in the open lands of Ryll. They were created and bred by the Grassland and Savannah kiarrcats and today most types are specially cultivated, though a few wild varieties exist (wild species tend to give off dimmer light). The most common species is a tall grass with a tough stem. A cluster of orb-like structures at the top of the stem give off a soft, blue-green glow, enough to find one's way around or read by.
Lightvine
Similar to lightgrass, the lightvines were bred by Forest and Rainforest kiarrcats as illumination for their woodland homes. The typical lightvine is a slender tree-climbing vine with broad, lobed leaves. The leaves give off light, mostly concentrated in the veins, and will continue to do so for several hours if picked before fading away over that time. Lightvines are typically grown so as to weave through treehouses, being decorative as well as functional.
Mikaberry
The mikaberry is a small parasitic vine found in the temperate forests. It grows by wrapping itself around trees and is a pale green in color. Every year, the vine gives a crop of small berries, also pale green, from which the plant gets its name. These berries have a cool, slightly minty taste, and can reinvigorate a tired creature if eaten, rather like coffee. They can be eaten raw or fermented into a prized, pale coloured wine, but they are never cooked - they lose all their taste and qualities if they are. Mikaberries are commonly cultivated by Forest kiarrcats, but they have to be careful not to grow too much or risk damaging the host trees.
Stinging Willow
This is a tree that has devised an ingenious solution to being eaten - it is venomous! The stinging willow has narrow, drooping branches from which hang normal leaves and stinging, vine-like tendrils. These tendrils are modified stems covered with tiny hairs that inject venom into any creature that brushes against them, like a jellyfish's stinging cells. The tendrils hang so thick that it is very difficult to even nibble on the tree's leaves without getting a mouthful of pain, which puts off thick skinned grazers that might otherwise brush off the stings. When stung, large animals experience an intense, burning pain in the affected area. Medium sized creatures such as kiarrcats experience the same, alongside stiffness or even temporary paralysis until the venom is flushed from the system. Small or weak creatures may die outright, often from the heart stopping in shock. There are several species of Stinging Willow, most living in Hrimroul (where the group probably originated) and Morou. A few species grow on Hashun and in the lesser islands. They are not very common on Rouen and its associated islands, but that may well be because the tree's strategy doesn't work so well on the dominant insectoid fauna.
Tangleroot
A species of three found in the Tikikarshu jungles, the tangleroot has evolved to withstand the powerful hurricanes that often batter the tiny continent. A tangleroot tree has a low centre of gravity, with a trunk shaped like a tall cone. Its leaves are fringed to let wind blow through them, and in calm weather they droop rather like fur tufts. The tangleroot's most striking feature for a ground dweller (as many Rainforest kiarrcats are) are the roots from which it gets its name. They protrude from the ground to form tall buttressed structures, firmly anchoring the tree in place. The roots of one tree will entwine with its neighbours so as to keep the whole stand in place, forming a complex 3D surface on the forest floor, full of little glades and pools. Tangleroots are one of the biggest trees on Ryll, and only the temperate greenmount trees of Rouen and northwest Hrimroul surpass their height. Many Rainforest clans on Tikikiarshu make their home within the sheltered root systems of these giants.