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A new species,    Polygonatum   praecox    Y.F.Hu &amp; J.W.Shao (  Asparagaceae  ), is described and illustrated. This species is similar to    P.   cyrtonema   ,    P.   odoratum    and    P.   caulialatum   , but can be distinguished from    P.   cyrtonema    by its racemose inflorescence, cylindrical hairless filaments and apex without a retrorse spur; from    P.   odoratum    by its stout moniliform rhizome, straight stem and longer (1.7–2.2 cm long) floral tube; and from    P.   caulialatum    by its upper part straight stem, yellowish-green corolla, lobes excurved and earlier flowering. The complete chloroplast genome of this new species is 155,115–155,256 bp in length. Phylogenetic analysis revealed that    P.   praecox    is not genetically related to the above three morphological similar species, but is closely related to the two European species (   P.   multiforum    and    P.   latifolium   ). This species is relatively common in mid-eastern China and has previously been confused with    P.   cyrtonema   . As its wild resources have decreased in recent years due to over-exploitation for medicinal or edible purposes, we classify it as Near Threatened ( NT ) according to the IUCN Red List Criteria.

﻿ Polygonatum praecox ( Asparagaceae ), a new species from mid-eastern China revealed by morphological and molecular evidence

Polygonatum praecox ( Asparagaceae ), a new species from mid-eastern China revealed by morphological and molecular evidence