Alright guys, scratch my old idea entirely, I've come up with a better one - the Goblin equivilent for this world, as it were! And they're playable!
Vegipygmies! Small, halfling-sized evil plant humanoids who primarily eat meat. (Note I say primarily, because they will grow fleshy-meat-like mushrooms as well.
These Vegipygmies come in 11 different varieties. 95% of the population are female, and are of the same variety. 5% of the population are males, and there are 10 different types of males. Some might breath poisonous gas, another might be fire resistant, and another might shoot webs, etc.
As a result of the low male population, Vegipygmies spawn young in bunches, and the females grow fast, becoming adults in 5 years, though reaching their maximum size (Still small) at 10 years. Males take twice as long to grow, but live far longer. Females only live 40 years. Males might live upwards of 300-500 years.
All Vegipygmies are made up of mostly the same materials. They have tough, hide-like 'skin', leaf or moss-like hair, bark-like nails and teeth, highly-alcoholic blood that causes mild dizziness upon contact, and probably a few minor organs. They have no bones. Some males may differ in what they are made of. All Vegipymies drop a special kind of plant upon death - Halfings prize these plants for their tastiness or quality, depending on the type. Some are edible, some are cookable, some are brewable, some can be turned into dye or cloth, etc. They do not give seeds, so are unplantable. One type is highly poisonous, causing death upon consumption - though its tasteyness might cause halfings to eat it anyways.
Veigpygmies are cannibals and love meat - they'll butcher sentient beings without issue, particularly favoring the meat of Halflings. They can extract marrow from bones, which they then eat. They also will be able to extract the blood from domesitic animals and vermin. They then can brew the blood with special types of plants into 'Blood Brew', a type of alcoholic beverage favored by Vegipygmies. It is poisonous to other creatures. They'll consume any type of alcohol, though, and can get by on water, though they prefer not to.
Most of the plants they can grow are brewable, but not cookable. Only one type is edible, and it is more like a small, immobile animal with a very meat-like texture. Most of the plants they favor are poisonous to other creatures. They can also fish, if need be.
They live underground, much like Dwarves - They are unable to smelt metal. Instead, they are able to 'grow' a specific type of metal - this is actually a type of mushroom that, when forged properly, can be made into weapons and armor that is similar in quality to iron. They can also make weapons and armor out of wood and bone and to a lesser extent, stone. They can make picks out of stone.
What do you guys think? And yes, for those curious, I did get the idea name from the Pathfinder Vegipygmy. Love those little buggers.
*Edit* Also, the reason I came up with Vegipygmies, is about a year ago running a homebrew Pathfinder game, I had an encounter where the players fought vegipygmies who were using halflings to breed their kin. They also had infected stew fed to customers that caused Vegipygmies to burst from their stomaches..
Halflings need an archnemesis race!