Mutant plant

The Sims
In The Sims, a similar plant, called the "Cytherea Asilus Casses", makes an appearance. It is possibly another variation of the Laganaphyllis Simnovorii (Cow Plant) from The Sims 2: University. The plant can only be placed on counters, and only requires food after the first Sim day.

 Its description reads: 

"This rare plant is an endangered species, but still ultra fab. The Cytherea Asilus Casses will sit quietly on a counter, or hide away in the corner on an end table, that is until it grows weary of your charades . . . and then you'll have to water it like any other plant, but maybe it's a better idea to have your butler do it for you."

The Sims Bustin' Out
The mutant plant makes its appearance in the The Sims Bustin' Out, but only in the console version. It can also be seen in the original trailer for the game. Although similar in appearance to the Laganaphyllis Simnovorii, it is perhaps a relative (or a precursor), as it does have several differences. The mutant plant is capable of biting, or in some cases even killing, a Sim. It can even kill NPCs such as the maid, which many players do to cause her to be able to walk through walls.

How to Get the Mutant Plant
In free-play mode, when your Sim has developed enough logic points, have them walk over to one of the incubators. An option to create a mutant plant should appear. You can choose to sell the plant, or to keep it and have your Sim look after it. If your Sim does not water it, or care for it sufficiently, it will grow larger and develop an appetite for your Sims. If this does occur, the mutant plant will not always be successful in its attempts to eat a Sim. There is about a 50% chance that a Sim bitten by the plant will remain living. If the mutant plant is cared for properly, it can be sold for money. The better it has been cared for, the more simoleons it can be sold for.

Another way to get the mutant plant is to visit Dudley Landgraab, get your Sim to steal one of the ferns located in the back of his house, and grow it from that. This can be an easier method of obtaining the plant, especially for Sims who do not have the required number of logic points, or who cannot get to an incubator. .