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Developmental Anatomy of the Floral Nectaries in Dracocephalum nutans Linn.
GENG Hua-Mei;FU Qiang;GUO Jun;WANG Hong*
Bulletin of Botanical Research . 2012, (1): 22 -27 .  DOI: 10.7525/j.issn.1673-5102.2012.01.005