Cypripedium arietinum is a terrestrial orchid, the ram's-head slipper orchid, belonging to the genus Cypripedium in the Orchid family. It flowers from May to July. Native to parts of Canada — Manitoba, Nova Scotia, Ontario, Quebec and Saskatchewan — it prefers shaded, sheltered sites. The plant favours moist, acidic, sandy, well-drained soil on north or east aspects.

Ram's-head slipper orchid (Cypripedium arietinum) flowers May to July and suits sheltered, north- or east-facing sites with moist, acidic, sandy soil.

https://en.wikipedia.org/wiki/Cypripedium_arietinum

Cypripedium is a genus of 58 species and nothospecies of hardy orchids; it is one of five genera that together compose the subfamily of lady's slipper orchids (Cypripedioideae). They are widespread across much of the Northern Hemisphere, including most of Europe and Africa (Algeria), Russia, China, Central Asia, Canada the United States, Mexico, and Central America.

Cypripedium arietinum

Ram's-head slipper orchid | Cypripedium arietinum

Cypripedium calceolus is an orchid that flowers in the UK from May to July. Native from Europe to Japan, it prefers sheltered, north- or east-facing positions in partial shade. It requires moist but well-drained, humus-rich soil with a neutral to slightly alkaline pH and is rated H5 (hardy) for UK conditions. It is a skin allergen, so wear gloves and other protective equipment when handling.

Yellow lady's slipper orchid Cypripedium calceolus flowers May to July and prefers partial shade in humus-rich, neutral to slightly alkaline soil.

https://en.wikipedia.org/wiki/Cypripedium_calceolus

Cypripedium calceolus

Yellow lady's slipper orchid | Cypripedium calceolus

Cypripedium californicum is a lady's slipper orchid in the genus Cypripedium, native to the western United States. It is grown for its distinctive slipper-type flower and flowers in late spring to midsummer. In cultivation it prefers partial shade, moist loamy soil and a sheltered, north- or east-facing position.

California lady's slipper (Cypripedium californicum) flowers May to July and prefers partial shade in moist, loamy, neutral to slightly acidic soil.

https://en.wikipedia.org/wiki/Cypripedium_californicum

Cypripedium californicum

California lady's slipper | Cypripedium californicum

Cypripedium candidum is an orchid known by the common name white lady's slipper and notable for its slipper-like flower. It naturally occurs in alkaline wetlands and fen habitats. Plants perform where soil remains moist and with partial shade. Expect flowering from May to July.

White lady's slipper (Cypripedium candidum) is an orchid for moist, calcareous alkaline fens that flowers from May to July.

https://en.wikipedia.org/wiki/Cypripedium_candidum

Cypripedium candidum

White lady's slipper | Cypripedium candidum

Cypripedium montanum is an orchid in the Cypripedium genus commonly called the Large Lady's Slipper. It flowers from May to July. The species favours partial shade on north- or east-facing sites and prefers moist, loamy, well-drained soil of neutral to slightly acidic pH in a sheltered position. It is native to parts of western Canada, including Alberta, British Columbia and Saskatchewan.

Large Lady's Slipper (Cypripedium montanum) is a Cypripedium orchid flowering May to July that prefers partial shade and moist, loamy, neutral to slightly.

https://en.wikipedia.org/wiki/Cypripedium_montanum

Cypripedium montanum

Large Lady's Slipper, Mountain Lady's Slipper, White Lady's Slipper | Cypripedium montanum

Cypripedium parviflorum is an orchid (genus Cypripedium) commonly called Slipper Root and native to North America. It flowers from May to July and prefers shaded, sheltered positions. Plants do best in moist, loamy, well-drained soil that is acidic to neutral. Position in north or east-facing spots where shade and shelter are reliable.

Slipper Root (Cypripedium parviflorum) is a North American orchid for shaded, moist, loamy soil and flowers from May to July.

https://en.wikipedia.org/wiki/Cypripedium_parviflorum

Cypripedium parviflorum

Slipper root | Cypripedium parviflorum

Cypripedium pubescens, the Yellow Lady's Slipper, is a lady's slipper orchid native to North America. It flowers from May to July and favours partial shade. Give it rich, well‑drained loamy soil that remains moist and leans acidic to neutral in pH, sited in a sheltered north or east-facing position.

Yellow Lady's Slipper (Cypripedium pubescens) prefers partial shade and moist, rich loamy soil with an acidic to neutral pH and flowers May to July.

Cypripedium pubescens

Yellow Lady's Slipper | Cypripedium pubescens

Cypripedium reginae is a terrestrial orchid in the genus Cypripedium, notable for its status as a lady’s-slipper orchid and its seasonal bloom. It is native to eastern North America and, in the UK, flowers from May to July. The plant prefers partial shade and humus-rich, well-drained soil that remains reliably moist with an acidic to neutral pH. Its tissues can provoke a skin allergic reaction, so wear gloves and protective equipment when handling.

Showy Lady's Slipper (Cypripedium reginae) prefers moist, humus-rich, acidic to neutral soil in partial shade and flowers in May to July.

https://en.wikipedia.org/wiki/Cypripedium_reginae

Cypripedium reginae

Showy lady's slipper orchid | Cypripedium reginae

Cypripedium tibeticum is a species of slipper orchid native to Bhutan, Sikkim and western China. It favours partial shade and a consistently moist, humus-rich, well-drained soil with a neutral to slightly acidic pH. Flowering occurs from May to July. Plant where the soil remains cool and lightly shaded through the growing season.

Cypripedium tibeticum (Lady's Slipper Orchid) prefers partial shade and moist, humus-rich, neutral to slightly acidic soil and flowers from May to July.

https://en.wikipedia.org/wiki/Cypripedium_tibeticum

Cypripedium tibeticum

Lady's Slipper Orchid | Cypripedium tibeticum

Cypripedium ventricosum is a perennial lady's slipper orchid hybrid valued for its pouch-like, slipper-shaped blooms. It suits partial shade in sheltered, semi-shaded sites and flowers from May to July. Plant in a well-drained, humus-rich soil that is neutral to slightly acidic and kept moist but free-draining. Handle with care: the plant is a skin allergen, so wear gloves and protective equipment when working with it.

Lady's slipper orchid (Cypripedium ventricosum) prefers partial shade and humus-rich, neutral to slightly acidic soil and flowers from May to July.