Sesuvium portulacastrum, commonly known
as shoreline purslane or (ambiguously) "sea purslane", is a
sprawling perennial herb that grows in coastal areas throughout much
of the world.
It grows as a sprawling perennial herb up to 30 centimetres (12 in)
high, with thick, smooth stems up to 1 metre (3.3 ft) long. It has
smooth, fleshy, glossy green leaves that are linear or lanceolate,
from 10–70 millimetres (0.39–2.8 in) long and 2–15 millimetres
(0.079–0.59 in) wide. Flowers are pink or purple.
It grows in sandy clay, coastal limestone and sandstone, tidal flats
and salt marshes, throughout much of the world. It is native to
Africa, Asia, Australia, North America and South America, and has
naturalised in many places where it is not indigenous