Abstract
The ovules ofCostus malortieanus are typically anatropous and are arranged along two lines on each septum, of the tricarpellary syncarpous inferior ovary. The ovular traces develop from the peripheral bundles of the axial vasculature. The ovule has a number of linear, translucent, multicellular appendages arising from the base and they are ontogenetically similar to ovular appendages in other Zingiberaceae. These appendages are derived partly from the funicle and partly from the free end of the outer integument; inC. malortieanus they are developed before anthesis and fertilization. The ovular appendages elongate considerably in the seed and entwine it irregularly. Seeds are more or less ovoid, compressed dorsiventrally and with the ventral surface highly wrinkled. It is concluded that the dual origin of the ovular appendages is a result of the anatropous nature of the ovule and may be of phylogenetic significance.
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Mangaly, J.K., Sworrupanandan, K. Some aspects of the morphology of the ovule and seed ofCostus malortieanus (Zingiberaceae). Proc. Indian Acad. Sci. 86, 175–179 (1977). https://doi.org/10.1007/BF03050945
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DOI: https://doi.org/10.1007/BF03050945