Ancestor: Cannabis sativa (Industrial hemp)
Evolved: By 2 Myh
Extinct: Not Yet
Location: West Catland hot grasslands to open woodlands.
Viable Habitat: Warm and hot grasslands and warm subtropical woodland habitats. Rarely can make up forests.
Sun: They are tolerant of full sun and will atrophy their branches if those branches don't receive enough full direct sun. Thus, woodland trees have high crowns and tall exposed trunks with no side branches, while grassland trees are fully covered with vegetation around all sides, with only a small area of trunk exposed at the base.
Growth medium: Grassland and woodland soil, preferred depth over 1 metre but can survive with 0.5 metre soil depth as long as they have enough horizontal area to spread out to. Can tolerate slightly sandy soils and poor water retention as it's roots reach out in all directions in search of water for several metres.
Water: While they can live in dry grasslands they can't live in any kind of desert. They need a lot of water for their growth for at least part of the year, but can deal with seasonal droughts as long as there will be a counterbalance of plenty of rain to compensate later. They shed most if not all of their leaves during this dry season. This benefits the tree as their sticky trichromes can cause clumping and accumulation of debris, so they need a yearly and sometimes bi-yearly renewal.
Size: Up to 10 m before age and size related degradation kills the tree. Males can start producing flowers at only 0.5 m. Females on the other hand don't produce their flowers until they are at least 1 m.
Life Cycle: Each tree produces flowers all of one sex, so there are male trees and female trees. This means no self-pollination.
The abundant dusty pollen falls easily from the male flowers, not needing assistance to start making their journey to the female flowers. However curious pollinators may still bump the flowers while inspecting them for any nectar, offering a more focused delivery of pollen. On the wind most of the pollen ends up in other places, never to reach the female flowers, but there is enough of it anyway that some of it will pollinate the females.
The seed is large, hard and smooth. What's more the seed is bitter with toxins, so even if a rodent is successful in cracking it, they'll regret it (but they'll live, they will just feel poorly for a while). Because seeds are quite large, round and heavy, their best chances of being transported away from their parent tree are floods, or being accidentally kicked across the ground by animals moving through the area. Because of this they don't spread geographically very quickly.
The most vulnerable time is not the seed, but the sapling. Many saplings sprout in an area around their parent year after year, but very few over the parent's life actually mature into trees more than a year old. While the saplings are still young and tender they're much more edible for herbivores to eat. They try to shoot up in height as fast as possible and work more on other forms of defence once they're broken around 1.5 metre in height. As a compromise, the animals defecate while feeding, offering nutrients to the tree that are rich and bioavailable.
Other: Their leaves and green stems are covered in trichromes producing a sticky sap. This sap is a pesticide against animals of all sizes. It kills insects through poisoning and also becoming trapped. Even animals like small mice can suffer fatal contamination of their fur or become adhered to the tree if they aren't careful. To mammals the sap is a stomach irritant, may cause vomiting and is bitter with a burning chemical taste. Larger animals that eat it will salivate and stop eating for a few hours due to mouth irritation and nausea.