Lactuca orientalis (Boiss.) Boiss.

Nomenclature
The Plant List Lactuca orientalis (Boiss.) Boiss.
GRIN Taxonomy Lactuca orientalis (Boiss.) Boiss.
Cichorieae Portal Lactuca orientalis (Boiss.) Boiss.
Tropicos Lactuca orientalis (Boiss.) Boiss.
Euro+Med Plantbase Lactuca orientalis (Boiss.) Boiss.


Native distribution
Asia Afghanistan; Armenia; Azerbaijan; China; India; Iran; Iraq; Israel; Jordan; Kazakhstan; Kyrgyzstan; Lebanon; Oman; Pakistan; Saudi Arabia; Syria; Tajikistan; Turkey; Turkmenistan; United Arab Emirates; Uzbekistan
Africa Egypt


Key features
Lettuce gene pool Tertiary relative
Chromosome number 2n = 18; 36
Habitat Rocky places
Flower colour Yellow
EURISCO (Dec. 2017) 3 accessions


Morphological description
Plant Height 10-60 cm, glabrous or subglabrous, spinescent, branched from base
Rosette leaves Glaucous green, rosulate, sinuate-dentate to pinnately lobed. Lateral lobes 2-4 pairs, triangular, retrorse, apex acute
Stem Whitish, rigid, intricately and divaricately branched
Stem leaves Similar to rosette leaves but smaller, less incised, and basally with linear auricles adnately long decurrent on stem
Heads Solitary, terminal and pedunculate or lateral and sessile, with 4-5 florets. Peduncle (when present) subulate, remaining as a spine after shedding of head. Involucre narrowly cylindric, 7-10 mm at anthesis, to 1.5 cm in fruit. Phyllaries green to bluish purple. Outer phyllaries ovate, abaxially pubescent. Inner phyllaries 3-4, apex obtuse. Florets pale yellow
Achenes 7-8 mm. Body brownish, narrowly ellipsoid, 1.0-1.3 mm wide, with 5-7 ribs on either side. Beak concolorous, firm, 2-3 mm. Pappus 7-8 mm, caducous
Reference Source: Cichorieae Portal - based on Shih C. & Kilian N. (2011) In: Wu Z.Y. et al. (eds) Flora of China 20-21: 236. Beijing and St. Louis