Floral nectaries from Limodorum abortivum (L) Sw and Epipactis atropurpurea Rafin (Orchidaceae): ultrastructural changes in plastids during the secretory process M. S. Pais and A. C.S. FigueiredoApidologie, 25 6 (1994) 615-626DOI: https://doi.org/10.1051/apido:19940612
