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Key to LactucaView taxon page for Lactuca
(For a list of species in Lactuca, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Fruit beak short, thick; biennial or perennial Completing life cycle (germination through death) in more than two years or growing seasons, generally non-woody (at least above ground) to woody; includes perennial herbs as well as subshrubs to trees; the abbreviation 'per' only refers to perennial herb, not to the word 'perennial' alone. herb 2' Perennial herb from long, deep rhizome 1. In seed plants, stem that is often elongate, more or less horizontal, usually underground; distinguished from roots by bearing of leaves, leaf scars, axillary buds, etc. 2. In ferns, stem that is located underground, embedded in leaf litter, on rocks or in rock crevices, or on trees or tree branches, often scaly or hairy; distinguished from roots by bearing of fronds (roots rarely bear fronds), and their greater diameter. ; open heads 2–3 cm diam; CaRH, c SNH, MP ..... L. tatarica subsp. pulchella 1' Fruit beak slender, thread-like; annual or biennial 3. Fruit with 1 median rib on each face 3' Fruit with 5–9 ribs on each face 5. Biennial; basal At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. rosette A radiating cluster of leaves generally at or near ground level. leaves toothed or shallowly lobed; cauline leaves widely clasping ..... L. virosa 5' Annual; basal leaves generally 0 at flower; cauline leaves with narrow, acute Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle. , basal lobes 1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth. clasping stem 6. Stems proximally decumbent lying mostly flat on the ground but with tips curving up. and arching upward or erect Upright; vertically oriented. , 5–10(20) dm; leaves lance-linear, entire Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). or few-lobed, lobes linear Elongate, with nearly parallel sides; narrower than elliptic or oblong. ; peduncles Stalk of an individual flower borne singly, not in an inflorescence, or of an entire inflorescence, or the corresponding structure in fruit; the stalk subtending an involucre (e.g., in Asteraceae, Polygonaceae). and inflorescence branches often appressed Parallel or nearly parallel to and often in contact with surface of origin; used to describe the disposition of hairs, leaves, pedicels, etc. to axis; flowers 5–12 ..... L. saligna 6' Stems erect, 5–30 dm; leaves oblanceolate to oblong-elliptic or obovate in outline, margins prickly-toothed, sometimes also coarsely lobed; inflorescence branches often widely spreading Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal. ; flowers 14–20 ..... L. serriola
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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