Thuja occidentalis Cupressaceae Names: Thuja Collection: The twigs of this evergreen conifer can be gathered all year round, but are best during the summer. Part Used: Young twigs Constituents: l% Volatile oil including thujone; flavonoid glycoside;...
Prunus serotina Rosaceae Names: Virginia Prune Bark. Habitat: Widely distributed throughout Canada and the USA. Collection: The bark is gathered from young plants in the autumn, when it is most active. The outer bark is stripped off and the inner...
Drosera rotundifolia Droseraceae Habitat: Grows throughout Europe on wet heaths, moors and sphagnum bogs, especially in Wales. Collection: The whole of the plant is gathered during the flowering period in July or August. Part Used: Entire plant...
Viola odorata Violaceae Names: Violet. Habitat: Widely found in Europe and Asia. Collection: The leaves and flowers are gathered in the spring, in March and April. Dry with care. Part Used: Leaves and flowers. Constituents: Phenolic glycosides...
Asclepias tuberosa Asclepiadaceae Names: Butterfly Weed. Habitat: USA Collection: The rhizome should be unearthed in March or April. Clean,split and dry. Part Used: Rhizome. Constituents: * Cardenolides, including asclepiadin * Flavonoids; rutin...
Trifolium pratense Papilionaceae Habitat: Widely distributed throughout Europe including Britain, naturalized in N. America and many other parts of the world. Collection: The flowerheads are gathered between May and September. Part Used: Flowerheads...
Pulmonaria officinalis Boraginaceae Habitat: Shady places throughout Europe including Britain, cultivated in gardens. Part used: Leaves. Collection: The leavres should be gathered during and after flowering, between March and September...
Althaea officinalis Part Used: Root and leaf. Constituents: In the root: Mucilage, l8-35% Miscellaneous; about 35% pectin, l-2% asparagine, tannins. In the leaves: Mucilage; including a low molecular weight D-glucan Flavanoids such a kaempferol...
Pilosella officinarum Compositae Common name: Hawkweed Habitat: A common British and European plant growing in sandy soil. Part used: Aerial parts. Collection: Mouse Ear should be collected when in flower between May andJune. Constituents:...
Verbascum thapsus Scrophulariaceae Names: Aarons Rod, Great Mullein. Habitat: Native to Britain, Europe and parts of Asia. Collection: The leaves are collected in mid-summer before they turn brown, dry in the shade. The flowers are gathered between...
David L. Hoffmann BSc Hons MNIMH