|Ophioglossum vulgatum growing in sand-dunes on Anglesey|
It is native to many regions with a wide scattered distribution: throughout temperate through tropical Africa; and throughout the temperate Northern Hemisphere in Europe, southeastern North America, temperate Asia, and Eurasia.
This small, hard-to-spot plant can occur singly in un-improved pastures, rock crevices and grassy path-sides, but also can occur in colonies of hundreds of plants in sand dunes.
Ophioglossum vulgatum grows from a rhizome base to 10-20 cm tall (rarely to 30 cm). It consists of a two-part frond, separated into a rounded diamond-shaped sheath and narrow spore-bearing spike. The spike has around 10-40 segments on each side.
It reproduces by means of spores.
Traditional European folk use of leaves and rhizomes as a poultice for wounds. This remedy was sometimes called the "Green Oil of Charity". A tea made from the leaves was used as a traditional European folk remedy for internal bleeding and vomiting. 
- Stace, Clive (2010b), New Flora of the British Isles (3rd ed.), Cambridge, UK: Cambridge University Press, ISBN 978-0-521-70772-5, p. 9
- GRIN treatment: O. vulgatum . accessed 2.14.2014
- Duke's Phytochemical and Ethnobotanical Databases: Ophioglossum vulgatum