Convallaria leptophylla D. Don = Polygonatum verticillatum (L.) All.
English:
leptophyllus,-a,-um;

https://archive.org/stream/mobot31753002385786#page/47/mode/2up
homotypic synonyms:
Polygonatum leptophyllum (D. Don) Royle;

protologue: Prodr. Fl. Nepal. : 47 (1825)

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