Botanical Survey of India | Flora of India
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JSP Page
KEY TO THE SPECIES
| 1a. Annuals of biennials; stems tall, 20-250 cm tall, erect, corymbosely or paniculately branched
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2
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| b. Annuals; stems short, 4-50 cm high, suberect, dichotomously branched
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5
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| 2a. Leaves uaually runcinate-pinnatitid, spinulose-toothed. sharply lobed, oblong-ovate or orbicular,
rarely lanceolate
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3
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| b. Leaves usually entire or sparingly 1/2 pinnatifid or lobed. very long, lanceolate or linear-lanceolate
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4
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| 3a. Leaves succulent, entire or minutely spinulose toothed; beak of achene twice longer than the body
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4.
Lactuca sativa
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| b. Leaves non-succulent, usully runcinate-pinnatifid, finely spinulose-toothed; beak slightly longer
than body or equalling the body
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5.
Lactuca serriola
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| b. Leaves not sagittate at base; achenes very flat, somewhat rounded or ellipsoid
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3.
Lactuca indica
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| 5a. Heads 1-1.2 x 0.3-0.4 cm; achenes 6-7 mm long including the capillary beak
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1.
Lactuca dissecta
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| b. Heads 1.7-2.2 x 0.4-0.5 cm; achenes 13-14 mm long including the capillary beak
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6.
Lactuca undulata
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JSP Page
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