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The nectar is a sugary substance that attracts birds and bees to the flower, who then take the pollen from the lining of the hypanthium and transfer it to the next flower they visit, usually a neighbouring plant. [5] The stamens borne on the hypanthium are the pollen-producing reproductive organs of the flower.
A plant derived from the asexual vegetative reproduction of a parent plant, with both plants having identical genetic compositions. coalescent Having plant parts fused or grown together to form a single unit. cochleariform Concave and spoon-shaped. cochleate Coiled like a snail's shell. coenobium An arranged colony of algae that acts like a ...
The carnivorous plant Nepenthes deaniana has pitcher elements that are obconic in shape to capture insects. [2] The hypanthium of the western USA plant Heuchera rubescens has one subspecies with an obconic structure, while several other subspecies have alternative hypantium geometries, so that the obconic characteristic is a subspecies determinant and diagnostic. [3]
In some flowers, a tube or cup-like hypanthium (floral tube) is formed above or around the ovary and bears the sepals, petals, and stamens. There may also be a nectary producing nectar. Nectaries may develop on or in the perianth, receptacle, androecium (stamens), or gynoecium. In some flowers nectar may be produced on nectariferous disks.
These include flowers that are usually radially symmetric and petals that are free. The gynoecium (female reproductive part) generally consists of two carpels (ovary, style and stigma) that are free, at least toward the apex (partially fused bicarpellate gynoecium) and possess a hypanthium (cup shaped basal floral tube).
Evolutionary developmental biology investigates such developmental processes that arise or change during evolution. If the hypanthium is absent, the flower is hypogynous, and the stamens, petals, and sepals are all attached to the receptacle below the gynoecium. Hypogynous flowers are often referred to as having a superior ovary. This is the ...
Side view of Tropaeolum majus, a plant with a nectar spur arising from the hypanthium of the flower. A nectar spur is a hollow extension of a part of a flower. The spur may arise from various parts of the flower: the sepals, petals, or hypanthium, and often contain tissues that secrete nectar (nectaries).
Plant growth and the plant cell from Kimball's Biology Pages; Botanical Society of America: What is Botany? Science & Plants for Schools; Teaching Documents about Botany Teaching documents, lecture; Why study Plants? Department of Plant Sciences, University of Cambridge; Flora and other plant catalogs or databases. The Virtual Library of Botany