Lactuca sibirica (L.) Benth. ex Maxim.

Nomenclature
The Plant List Lactuca sibirica (L.) Benth. ex Maxim.
GRIN Taxonomy Lactuca sibirica (L.) Benth. ex Maxim.
Tropicos Lactuca sibirica (L.) Benth. ex Maxim.


Native distribution
Europe Estonia; Finland; Latvia; Norway; Russian Federation; Sweden; Ukraine
Asia China; Japan; Kazakhstan; Mongolia; North Korea; Russian Federation; South Korea


Key features
Lettuce gene pool Tertiary relative
Chromosome number 2n = 18
Habitat Woodlands; ruderal places
Life history Perennial
Breeding system Allogamous
Flower colour Blue
EURISCO (Dec. 2017) 2 accessions


Morphological description
Plant Height 30-100 cm, with vertical, usually branched rhizome
Stem Erect, glabrous, simple or branched in the upper part, smooth or grooved, greyish green to purplish
Leaves Lanceolate, 12-16 x 2-3 cm, undivided with entire or denticulate margin or pinnatilobed to deeply laciniate. Basal leaves with cordate halfclasping base
Inflorescence Corymb or corymbose panicle
Heads Relatively big (up to 3.3 cm) on thin branches. Florets numerous, ± 20. Involucral bracts 12-15 mm long, often purplish tinged, slightly hairy at the apex. Ligules blue
Achenes Fusiform, olive, 4-5 x 1.0-1.5 mm. Beak as long as 1/4 of the body. Pappus white or yellowish, 5-9 mm long
Reference Cichorieae Portal - based on Feráková V. (1977) The Genus Lactuca in Europe. Bratislava