Growth Paths of Pollen Tubes in Ovary of Phaius tankervilliae (Aiton) Bl. (Orchidaceae) Ultracytochemical Localization of Calcium during Embryo Sac Development in Phaius tankervilliae(Orchidaceae) Ultrastructural Observation on Embryo Sac Development in Phaius tankervilliae (Aiton)Bl. The Relationship between Ovule Development and Isozymes after Pollination in Phaius tankervilliae (Aiton) Bl. The Relationship between Ovule Development and Isozymes after Pollination in Phaius tankervilliae (Aiton) Bl.