This study elucidate the micromorphological changes and leaf architectural developments of in vitro (multiplication phase) and in vivo transferred (acclimatized plants in the field) micropropagated plantlets of Passiflora edulis Sims. f. flavicarpa Deg. The in vitro leaves were small, ovate and pale green in color; but glossy, bright green colored leaves with conspicuous midrib were observed in field transferred plants. Constantly opened stomata throughout the culture period were found under in vitro conditions, these were fully functional after field transfer of the plantlets. In vitro environment favoured increased stomatal density (80.5), stomatal index (28.8), under-developed trichomes, reduced vein islet density (7.0) and irregular venation pattern. Reduced stomatal density (63.4) and index (25.3), well developed trichomes, increased vein islet density (22.0) and regular venation pattern were observed in field acclimatized plantlets. Crystals were absent in the in vitro grown leaves but well developed rhombohedral and sphaerocrystals were observed throughout the major and minor veins in the cells of field plants. The foliar micromorphological study revealed that the in vitro environmental conditions favoured the development of abnormal features. These anomalies have been adjusted and plants developed structural and morphological changes needed for successful adaptation in the field conditions.