Myrcia neothomasiana, commonly known as Thomas' lidflower, is a rare species of plant in the family Myrtaceae.

The oppositely arranged leaves have oval blades 2 to 4 centimeters long which are shiny green and glandular.

[2] There are only 10 to 12 individuals known from this area, and although the threat of damage from Navy activity is gone today, the plant is still vulnerable to extirpation from any one severe event, such as a hurricane.

[3] They do face threats from activity on nearby roads, and from feral pigs, donkeys, and goats.

[3] Deforestation was cited as a main reason for the plant's being added to the endangered species list of the United States.