Sesuvium edmonstonei is a low-growing perennial plant. The stems, which are fleshy and covered with scales, are sometimes woody at the base. The succulent leaves are oblanceolate and grow in opposite pairs; they are simple, entire and up to long. The flowers grow in the leaf axils, each having a five-lobed white
calyx, no
petals, and many
stamens. The fruits that follow are ovoid capsules, with lids, containing black seeds with wrinkled cuticles. The plants develop orange and red hues in the cool season. ==Distribution and habitat==