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Cucumis
See list of 4 species in this genus-
1a. Leaf blades prominently lobed, with deep, rounded sinuses; petals 4–8 mm long
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2a. Pepo obloid to ellipsoidal, 3–6 cm long
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2b. Pepo ± globose, 2–2.5 cm long
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1b. Leaf blades simple or lobed with shallow, often angular, sinuses; petals 20–30 mm long
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3a. Fruit usually cylindrical, the exocarp prickly with sharp elevations, the mesocarp not sweet, ± white; stems rough-pubescent
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3b. Fruit usually globose to subglobose, the exocarp without prickly elevations, though sometimes rough or warty, usually pubescent initially (often becoming glabrous), the mesocarp sweet tasting and orange, yellow, or green; stems soft-pubescent
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Each photo represents one species in this genus.