| Plant |
Height up to 150 cm, almost glabrous, thick vertical rhizome with numerous underground stolons |
| Rosette leaves |
Petiolate, pinnatisect |
| Stem |
Erect, branched in the upper part |
| Stem leaves |
Similar shape as rosette leaves but sessile with semi-amplexicaul base, rarely undivided, all glaucous, rigid, denticulate on the margin |
| Inflorescence |
Spike-like or corymbose panicle |
| Heads |
Numerous, composed of 16-23 florets. Involucre of 3-4 rows of bracts. Outer bracts 12-15 mm long, lanceolate with obtuse apex, usually purplish tinged. Ligules blue, rarely white |
| Achenes |
Slightly compressed, 4.5-6.5 mm long x 1 mm broad, yellowish, olive to blackish, 5-7 ribs. Beak very short, 1.0-1.5 mm, as long as 1/3 of body. Pappus white, about 8-9 mm long |
| Reference |
Cichorieae Portal - based on Feráková V. (1977) The Genus Lactuca in Europe. Bratislava |
