(Capcom's primary storyline)
The Veronica Plant was a plant-based B.O.W. created through the use of the T-Veronica virus.
This plant was first cultivated in the Umbrella Antarctic Base by Alexia Ashford. After the experiment she had done to herself, Alexia is capable of using the plant's tentacles to do her will, and even mutating her body into an insectoid monster.
Javier Hidalgo secretly cultivated the Veronica Plant in his mansion's green house. It is considered to be one of the strongest and most dangerous B.O.W.s by far, due to its capability of dispersing its spores, which could transform neighboring vegetation into Veronica Plants as well. The speed at which they can spread is astounding. Presumably, in only 48 hours, it could invade 60% of the Amazon. Practically speaking, this extremely dangerous organism could destroy a continent's entire ecological system within a matter of days.
In 2002, during the events of Operation Javier; Leon S. Kennedy and Jack Krauser were sent to apprehend Javier because of his dealings with an Umbrella researcher rumored to be hiding in South America. Javier then fused with the blooming Veronica Plant and became the V-Complex.