Lactuca sativa L.
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Details
Nomenclature
L.
L.
1753
795
ICN
Lactuca sativa L.
species
Lactuca sativa
Classification
Vernacular names
Descriptions
Lactuca sativa L.
Glabrous annual or biennial. Stem erect, branching above, grooved, c. 20-60 cm tall. Rosette and lower stem lvs bright green, tapering to base, 4-10-(15) × 3-8-(12) cm, deeply 1-2-pinnatifid; lobes broad, finely toothed, sinuate or crisped. Upper lvs becoming glaucous and pruinose-papillate, sessile, ternatifid or not divided, triangular to ovate, with rounded to oblong subamplexicaul auricles at base. Infl. diffusely paniculate. Capitula numerous, narrowly ovoid. Involucre (6)-10-12 mm long; bracts imbricate, erect or suberect at fruiting; outermost bracts ovate, obtuse, c. 1/4 length of innermost bracts; inner bracts lanceolate, obtuse. Florets 1.5-2× length of involucre; corollas erect to erecto-patent, pale yellow, sometimes violet-streaked. Achenes grey, 5-9-ribbed on each face, obovate, flattened, scabrid distally on ribs; body 3-3.5 mm long; beak pale, = body. Pappus fine, white.
Taxonomic concepts
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Metadata
044c4093-d4ed-4635-b652-9138987f39e6
scientific name
Names_Plants
1 January 2000
20 November 2013