兰花蕉花的形态解剖学

兰花蕉（Orchidantha chinensis)的子房室顶部闭合后向上延长成延长部，实心，但有花柱沟和隔膜蜜腺管通过，隔膜蜜腺管，可分为中央蜜腺管和三条侧蜜腺管；中央蜜腺管位于三个心皮连接处，自子房室区下部产生，向上于延长部的部顶端终止；三条侧管分别位于两个心皮连接处，于子房室区近中部产生，开口于花柱基部。兰花蕉子房室区与延长部均具6枚雄蕊的维管束系统，即3枚心皮背束的伴束与3枚隔膜束，近轴面1枚事膜向上进入唇瓣的维管束系统，位于唇瓣的中央，致使兰花蕉仅具5枚功能雄蕊，唇瓣具双重结构，本文还讨论了兰花蕉科的系统发育位置。

FLORAL MORPHOLOGY AND ANATOMY OF ORCHIDANTHA CHINENSIS(LOWIACEAE)

The ovary locule of Orchidantha chinensis is closed at the top and extendsupwards to form prolongation that is solid and penetrated by the stylar canals andgynopleural enctary ducts. One central nectary duct and three lateral nectary ducts can berecognized, and the central one is situated in the fused region of the three carpels, whilethe lateral ones are between that of two carpels. The central duct arises at the lower part oflocular region of the ovary, extending upwards and closing at the end of the narrow part ofthe prolongation, while the three lateral ducts occur at nearly the coddle of the locularregion and exit beside the base of the style. Vascular bundles of six stamens, threeaccompanying bundles of the dorsals and three parietal bundles, exist in locular region andprolongation, while the adaxial parietal bundle fuses with the vascular system which willenter labellum in the uppermost part of the prolongation. As a result the labellum is adouble structure and the flower possesses only five stamens. The phylogenetic position ofLowiaceae is also discussed.