Solanum nigrescens ("Oinuhozuki")

Japanese name: オオイヌホオズキ （大犬酸漿）
Scientific name: Solanum nigrescens

[Overview]
An annual or short-lived perennial.
The stem is erect and much branched; in large plants that have overwintered, the base falls over and spreads along the ground.
The leaves are simple and alternate, 5–15 cm long and 3–8.5 cm wide, broadly ovate, with entire margins or with wavy teeth and a few tooth-like projections.
The flowers are borne 5–8 per umbel.
The corolla is 8–12 mm across, white sometimes tinged with purple, and 5-lobed.
The fruit is spherical, 7–10 mm across, ripens black, and is slightly glossy.

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