Paphiopedilum charlesworthii aka Charlesworth Paphiopedilum

Paphiopedilum charlesworthii is an orchid in the Orchidaceae family. It keeps its leaves all year. Its home range runs from Assam's Mizoram region to western Yunnan, China. Kew places it in the wet tropics. It can grow on trees or root near ground level. In pots, it forms clumps of leaf rosettes. These are groups of leaves that grow from one centre. It suits indoor pots, glass rooms and heated greenhouses.

Plants reach about 0.3–1.6 feet [0.1–0.5 metres] tall and wide. The RHS gives two to five years to reach full size. The glossy green leaves are long and shaped like straps. Each can reach 0.82 feet [0.25 metres] long. Their width reaches about 0.10 feet [0.03 metres]. This orchid has no pseudobulbs. These parts store water in many other orchids. Its roots should thus not stay dry for long.

Flower stems grow from the rosette centres in summer and autumn. Each stem bears one flower that lasts a long time. The bloom measures about 0.26 feet [0.08 metres] across. Its pouch and petals are lime green with brown veins. The dorsal sepal, at the top, is white with pink marks. The flowers form the main show above the green leaves.

Give this orchid bright light, but filter it. Keep the air more humid in summer. The RHS suggests summer heat of 20–25°C. In winter, it suggests 18–22°C. Its H1A rating means it needs heated shelter all year. Use a bark-based mix for orchids that root in the ground. Add sphagnum moss and perlite, or use crushed limestone chips. The RHS lists a neutral pH and soil that drains well. Water as the mix nears dryness, before it stays dry. Do not leave the pot standing in water. Do not keep the roots wet for long. Feed with every third watering.

Avoid heavy misting and do not water over the leaves. Cold and water from above can cause bacterial rot. This can harm the centre of a leaf rosette. Apart from this, the RHS reports few disease problems. Mealybugs may occur, though pests are not a frequent problem. The plant needs no pruning. Split mature clumps when they outgrow their pots. Each new clump must have at least three healthy rosettes with roots. To raise plants from seed, use a lab with controlled conditions. The supplied sources do not say if this plant is safe to eat or toxic.