Orchis militaris is a European orchid that produces upright flowering spikes to about 0.6 m. It flowers from April to June, carrying lilac to purple blooms. The plant prefers full sun and tolerates a range of soils so long as they remain moist but well-drained and is fully hardy in UK gardens (H7).

Military orchid (Orchis militaris) flowers April to June, reaches about 0.6 m and favours full sun in moist but well-drained sandy to clay soils.

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

Orchis is a genus in the orchid family (Orchidaceae), occurring mainly in Europe and Northwest Africa, and ranging as far as Tibet, Mongolia, and Xinjiang. The name is from the Ancient Greek ὄρχις, meaning "testicle", from the appearance of the paired subterranean tuberoids.

Orchis militaris

Military orchid | Orchis militaris

Orchis purpurea is a terrestrial orchid that produces a dense spike of closely packed flowers, the upper petals and sepals showing purple tones while the lip is pale and often spotted. It favours calcareous, alkaline soils in partial shade and flowers in spring. Plants form a basal rosette of fleshy leaves that surround the flowering stem. Flowering in the UK runs April to June.

Lady orchid (Orchis purpurea) bears purple-tinged blooms with a pale, spotted lip and flowers April to June in partial shade.