Horminum pyrenaicum aka Dragonmouth

Horminum pyrenaicum is a perennial, a plant that lives for years. It belongs to the mint family, which has the name Lamiaceae. Its common names include dragon’s mouth and Pyrenean deadnettle. The RHS accepts Horminum pyrenaicum as the correct scientific name. These are names for the species, not just one named form.

Its native range includes the Pyrenees and Spain’s Cantabrian Mountains. It grows in the wild in the Alps too. Kew places the species in the temperate biome. This term describes a broad kind of climate and habitat. The RHS records that it is not native to Britain. It is not native to Ireland either. These range records describe where the plant comes from. They do not give detailed guidance on how to grow it.

The supplied evidence for the species gives no mature height. Nor does it state how wide the plant can grow. It gives no details about its leaves or stems. Details about its flowers and fruit are absent too. The Chicago Botanic Garden page covers a named form instead. That form is Horminum pyrenaicum f. alboviolaceum. Its looks do not establish those of the whole species. The same limit applies to its traits in the garden. Details from that page cannot fill these gaps for the species.

The sources for the species give no detailed soil guidance. They do not explain its light needs or watering needs. They give no hardiness rating to show its cold tolerance. Nor do they state when the plant blooms. The sources also give no facts about pests. This leaves gaps in the care details for the species. The named form’s garden traits cannot supply those missing facts.

The sources give no evidence about parts people can eat. They also give no evidence about whether the plant is toxic. Neither gap proves that this plant is safe to eat. A lack of facts on harm is not proof of safety. The evidence therefore does not establish edible parts or safe use. These limits apply to the species account as a whole. They must remain clear when reading the facts given here.