= Gossypium
{c}
<Gossypium> is the <taxonomic genus> of cotton <plants>, placed in <Malvaceae>. The genus name denotes a group of related <species>, while <cotton> can also refer to their harvested fibres or the resulting material. A taxonomic name and a material name consequently do not identify the same kind of object.<Gossypium in Plants of the World Online>[Accepted genus record and classification in Malvaceae]{ref}
The fibres make a striking connection between plant diversity and cell mechanics. In the studied cultivated <cotton>, an individual fibre is an elongated <cell> growing from the <seed coat> <plant epidermis>. A 2001 study followed <fluorescent tracer> movement into these growing <cells> and related changing intercellular access to developmental stage.<The control of single-celled cotton fiber elongation by developmentally reversible gating of plasmodesmata and coordinated expression of sucrose and K+ transporters and expansin by Y. L. Ruan and others>[Abstract and Figure1: single-cell fibres and changing tracer access]{ref}
For an original classification example, a record might identify a specimen's <taxonomic genus>, measure the length of 100 sampled fibres and record how much material was harvested. Those are three distinct observations. A genus assignment does not fix every fibre's length, and a fibre measurement alone does not identify a <species>.
Comparisons within <Gossypium> should therefore keep taxonomic identity, developmental stage and measurement conditions explicit. The common word <cotton> does not guarantee that two samples have the same ancestry or cellular properties.
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