& Kadereit (2014) Geocarpon minimum is a species of flowering plant in the carnation family (Caryophyllaceae) which is known by the common names tinytim and earth-fruit.

[6] The plant was probably widespread on the North American continent long ago, but the climate changed, and it now exists as a relict species in a narrow strip of hospitable habitat.

[3] It grows on sandstone glades and outcrops as well as bare, sparsely vegetated areas where the soil contains relatively large amounts of magnesium and sodium salts.

[3] It can be found on "slicks" with a coating of lichens and Nostoc cyanobacteria that are very wet after winter rain and then dry into a hard crust.

[3] It is an ephemeral species, sprouting up and generally undergoing its full life cycle within four weeks around February and March,[6][7] or as late as June in some areas.

[3] Although the tinytim is still quite limited in range and minor threats still exist, it has a "high recovery potential" and is almost ready to be removed from the endangered species list.