The 3.5 version, would only have the plants that were in the container hinder movement.
The SRD specifically state that the plants in the area "wrap, twist, wind, and wrap around creatures that are in the area or enter the area."
Not only that, but the plants ability to wrap around people is altered based on the plants. The spell is a transmutation, which means it utilizes the resources already there. It's not evocation or conjuration.
The SRD specifically state that the plants in the area "wrap, twist, wind, and wrap around creatures that are in the area or enter the area."
Not only that, but the plants ability to wrap around people is altered based on the plants. The spell is a transmutation, which means it utilizes the resources already there. It's not evocation or conjuration.