Literature cited
Chase, M. W., Cameron, K. M., Freudenstein, J. V., Pridgeon, A. M., Salazar, G., van den Berg, C., and Schuiteman, A. 2015. An updated classification of Orchidaceae. Botanical Journal of the Linnean Society 177: 151-174.
Dressler, R. L. 1993. Phylogeny and Classification of the Orchid Family. Cambridge University Press.
Molvray, M. and Chase, M. W. 1999. Seed morphology. Pages 59-66 in Genera Orchidacearum. Volume 1. General Introduction, Apostasioideae, Cypripedioideae (ed. Pridgeon, A. M., Cribb, P. J., Chase, M. W., and Rasmussen, F. N.). Oxford University Press.
Ziegler, B. 1981. Mikromorphologie der Orchidaceen-Samen unter Berücksichtigung taxonomische Aspekte. Ph.D. thesis, Ruprecht-Karls-Universität, Heidelberg.
Alec Pridgeon
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