An idea occured for me a little while back when I was thinking about an arid location, and looking at a cactus. Everything's a little rough at the moment, and keeps changing, but I guess it leaves some room for interpretation right?

So, for starters, whatever these plant critters are, they have a basic humanoid frame, two legs, arms, ect. Their head's got stiff leaves, shaped in the manner for catching water, pooling it down at the top of their head so they can absorb it. The leaves fold up into a bundle when not in use to protect them. It'd be like a ponytail of sorts. There's no dicernable facial features on them, except for two beady black eyes. I figure if you're going to have a mobile sapient plant, you need limited vision of sorts. But I don't know what their eyes are made out of yet or what exactly they are. They're not exactly what you would call eyes.

The feet(toes) and hands are a tougher material, like roots. At the base of their hands, where your knuckles would be, are transparent sacks showing through their "skin" which is a combination of intertwined vines and a tougher outer layer that wraps around them. These sacks are filled with water, and tend to protrude from jointed areas, or in particular, where certain muscles would be on humans or other bipeds. It's not organized, and not symetrical however. These sacks, when pressed on, or expanded and contracted by the vines, act like muscles so the plant critter can move, walk, somewhat run, pick up stuff and so on. Plants by themselves are capable of moving, but not fast. With those water based sacks, movement is much faster when organised into a special system.

But because of this, physically, these plant critters aren't very strong. No muscle bound beings here.

So, I got to thinking. How would a sapient, bipedal mobile plant like this defend itself? Well, for starters, plants are naturals at regeneration. So long as enough mass remains, they can regenerate rather quickly. And second is where the cactus comes in. Underneath their tougher patches of skin that cover their vines and water-muscles, are cactus like spines. Over their arms, legs, and torso. These barbs can be shot up through the skin and stay there, or they can be shot out, like a dirty bomb using nails. When their skin is breached by the barbs, it ejects a bright purple liquid, a bright warning and toxic poison to most lifeforms. So if their attacker is wounded by their barbs and gets that stuff in their system, it's trouble.

And there you have it. A sapient cactus plant.

Your input is greatly valued and will be taken into consideration in the future.

It takes you a few hundred extra words just to write something not longer than a few sentences.

Descriptions descriptions. Half the fun is the idea. By all means, I could just say, hey, here's a fucking cactus. It's got legs.

But what fun would that be? Give it some form and function, something you could actually visualize. Then again, not really my fault. It's not my fault that I sat down on a fucking bench and looked over at the cactus sitting there, and suddenly this created itself.