
(from the article `Amaryllidaceae`) Many species are cultivated as garden ornamentals or pot plants, especially the belladonna lily (Amaryllis belladonna), tuberose (Polianthes), ...
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http://www.britannica.com/eb/a-z/b/44

(Amaryllis) This group consists of one deciduous plant, A. belladonna (Belladonna Lily; Naked Lady Lily), which is native to southern Africa and has been naturalized in some areas of the U.S. This plant grows from a true bulb to 2 or 3 feet high. It produces long, slender leaves in the spring, which die back in early summer. Then, in late summer, 2...
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http://www.encyclo.co.uk/local/10004

The Belladonna lily so called on account of its beauty, is a species of Amaryllis (Amaryllis Belladonna) with delicate blushing flowers clustered at the top of a leafless flowering stem. It is a native of the Cape of Good Hope and of the West Indies.
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http://www.probertencyclopaedia.com/browse/BB.HTM

[
n] - amaryllis of South Africa often cultivated for its fragrant white or rose flowers
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http://www.webdictionary.co.uk/definition.php?query=belladonna%20lily
naked lady 1 Amaryllis belladonna noun amaryllis of South Africa often cultivated for its fragrant white or rose flowers
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https://www.encyclo.co.uk/local/20974

amaryllis (def. 2).
Found on
https://www.infoplease.com/dictionary/belladonna-lily
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