Plants that face down zombies

In PopCap games' Plants Vs. Zombies™: The player selects plants to use in a round, such as the basic pea shooter plant (a; less deadly but also less costly of solar power than blue pea plants or multi-shot pea plants), the sun-harnessing sunflower (b) whose output makes all other planting possible, a walnut (c) so tough to crack it slows a hungry zombie, a squash with an attitude (d) and zombie-stomping ability, a chili so hot (e) that it can ignite a whole line of zombies, and the torchwood (f).