Epiphyllum pumilum aka Epiphyllum Oxypetalum ( Lady Night)

Epiphyllum pumilum is a cactus in the Cactaceae family. It stays green all year. It grows on other plants for support, as an epiphyte. Its home range runs from southern Mexico to Honduras. It also grows in Belize and Guatemala. In Mexico, it grows in Chiapas, Oaxaca, Tabasco and Veracruz. It lives in both dry and damp tropical forests. Records place it up to 1,969 feet [600 metres] above sea level. Kew places it in a tropical biome with dry seasons.

The plant forms a bush with long branches that spread. These may stand partly upright or hang down. Useful Tropical Plants gives its height as 9.8 feet [3 metres]. Each branch can grow to 16.4 feet [5 metres] long. These numbers measure two different things. They do not give a garden height range. The flat stems look like leaves, but they are stems. They span about 0.07–0.30 feet [0.02–0.09 metres] across. The green growth lasts all year. Long, hanging branches help give the plant its shape.

The flowers have a scent and open at night. Useful Tropical Plants says bats and moths pollinate them. The small red fruit has white flesh inside. People gather this plant in the wild for local food use. The same source says people can eat the fruit raw. This record covers the fruit, not the stems or flowers. The supplied account gives no month or season for bloom.

When grown, this cactus needs shade and shelter from frost. Grow it in a mix rich in humus that drains well. The cited guide calls for an acid pH below six. These needs match its life on plants in tropical forests. Do not treat it like a desert cactus that needs sun. The evidence gives no set plan for when to water. It gives no exact winter heat or cold limit, either. It has no pest or disease account for this species.

Useful Tropical Plants lists no known hazards for this species. This does not prove it is safe for people or pets. The source lists no use as medicine or other practical use. It says the plant has a wide range and grows in large numbers. Several groups of wild plants grow in protected sites. The source cites a 2017 IUCN review. That review rates the species as Least Concern. It lists no major threats to the plant's survival.