Habit: Portulaca rubricaulis grows as a succulent annual or perennial up to 20 cm in height. The succulent leaves are arranged oppositely, linear to oblong, to 2 cm in length, with an entire margin, an acute to obtuse leaf apex and with hairs in the leaf axils.
The complete, perfect, actinomorphic flowers are arranged solitarily at branch terminals. The calyx has 2 unfused sepals. The corolla has 5 unfused yellow petals. There are numerous stamens. The carpel has an inferior ovary with a single locule and many seeds. The fruit is a capsule at maturity. When mature the capsule opens above the base of the fruit leaving a shallow cup with seeds.
Habitat: Portulaca rubricaulis grows on exposed flat rock and sand in coastal areas and Dunes.
Distribution: Portulaca rubricaulis occurs throughout the Lucayan Archipelago, the Greater Antilles, Central and northern South America.
Medicinal/Cultural/Economic usage: Portulaca rubricaulis is not known to be used medicinally in the Lucayan Archipelago.