Blight

(Player's Handbook v.3.5, page 206, DnD 3.5)

Necromancy

Level: ; Druid 4; Sorcerer/Wizard 5; Blighter 4; Urban Druid 4; Sha'ir 5; Death Master 5; Dread Necromancer 5
Components: V, S
Casting Time: 1 standard action
Range: Touch
Duration: Instantaneous
Saving Throw: Fortitude half; see text
Spell Resistance: Yes

This spell withers a single plant of any size.
An affected plant creature takes 1d6 points of damage per level (maximum 15d6) and may attempt a Fortitude saving throw for half damage.
A plant that isn't a creature (such as a tree or shrub) doesn't receive a save and immediately withers and dies.
This spell has no effect on the soil or surrounding plant life.