Astrantia major, common name great masterwort, is a species of flowering plant in the family Apiaceae, native to central and eastern Europe. Growing to 90 cm (35 in) tall by 45 cm (18 in) broad, it is an herbaceous perennial, much used in gardens.
Astrantia major reaches on average 60 centimetres (24 in) of height. The stem is erect and glabrous, with little branches and few leaves. The basal leaves have a long petiole 10–20 centimetres (3.9–7.9 in), 3 to 7 lobes and toothed segments. Size: 8–15 centimetres (3.1–5.9 in). The cauline leaves are generally two, sessile, amplexicaul and lanceolate-shaped with a trilobed apex. The inflorescence is umbrella-shaped, with 2–3 centimetres (0.79–1.18 in) of diameter. The floral bracts are numerous (10 - 20), 10–18 millimetres (0.39–0.71 in) long, reddish (sometimes white) with acuminate apex. The small flowers are greenish-white with reddish shades. The central ones are hermaphrodite, while the external ones are male. The petals are five, white (or slightly reddened), while the stamens are five and much longer. Size of the flowers: about 1 mm. The flowering period extends from June through September.
Astrantia major is an entomophilous plant, mainly pollinated by beetles, but also by other insects. This perennial plant reproduces itself also by means of buds present at the ground level.
These plants native of Europe and Western Asia are widespread in southern Europe (Pyrenees, Carpathians and Balkans), but also in the Caucasus up to Anatolia. They have been introduced into the British Isles and are well established in various localities.
They are common in mountain meadows and grasslands, in forests and clearings and close to the streams, usually on calcareous soils, at an altitude of 100–2,300 metres (330–7,550 ft) above sea level.
- Astrantia major L. subsp. carinthiaca (Hoppe) Arcang. : Larger umbels (4-5 cm in diameter) widespread mainly in the eastern Alps.
- Astrantia major var. involucrata Koch
- Astrantia major L. subsp. elatior (Frivaldsky) Maly: bracts with 5 nerves and with notched apex; teeth of the calyx are very long; widespread in the Apennines.
- Astrantia caucasica Auct. Fl.Ital non Sprengel
- Astrantia major L. subsp. major
Many strains of Astrantia major grow well in the garden, given some shade and moisture. Their flowerheads provide summer colour in shades of red, pink and white. The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:-
Other cultivars include:-
- Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
- "RHS Plant Selector - Astrantia major subsp. involucrata 'Shaggy'". Retrieved 11 June 2013.
- "RHS Plant Selector - Astrantia major 'Sunningdale Variegated'". Retrieved 11 June 2013.
- Pignatti S. - Flora d'Italia (3 voll.) - Edagricole – 1982
- Tutin, T.G. et al. - Flora Europaea, second edition - 1993
- Conti F., Abbate G., Alessandrini A., Blasi C., 2005. An annotated checklist of the Italian vascular flora, Palombi Editore
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