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Phylum

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I'm not a botanist, so I am confused as to why this plant has no phylum listed. When I checked on other websites, I got more than one answer. Can anyone explain why different people classify this plant so differently?

This Wikipedia article currently states:

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Malvales
Family: Malvaceae
Genus: Gossypium

However, plants.usda.gov/classification states:

Kingdom Plantae -- Plants
Subkingdom Tracheobionta -- Vascular plants
Superdivision Spermatophyta -- Seed plants
Division Magnoliophyta -- Flowering plants
Class Magnoliopsida -- Dicotyledons
Subclass Dilleniidae
Order Malvales
Family Malvaceae -- Mallow family
Genus Gossypium L. -- cotton P

And bats.ch/molspec states this:

Popular Name: Cotton
Super Kingdom: Eukaryota
Kingdom: Viridiplantae
Phylum: Streptophyta
Sub Phylum: Embryophyta
Division: Tracheophyta
Subdivision: Spermatophyta
Super Class: Magnoliophyta
Class: Rosidae
Super order: Euroside ii
Order: Malvales
Family: Malvaceae
Genus: Gossipium

And http://merops.sanger.ac.uk/cgi-bin/speccards?sp=sp003417&type=p states that:

Superkingdom Eukaryota
Kingdom Viridiplantae
Subkingdom Streptophyta
Phylum Embryophyta
Subphylum Tracheophyta
Superclass Magnoliophyta
Class Magnoliopsida
Subclass Rosidae
Order Malvales
Family Malvaceae
Genus Gossypium


Thank for your help. RK 17:30, May 11, 2005 (UTC)

Have you checked out the tree of life (TOL) web site? I would trust that to be the most up to date source on the web. Alternatively contact an expert in the field, for example, David Baum works on the phylogenetic analysis of the Core Malvales and is a contributor to the TOL web site.
I hope this helps, David D. 18:01, 11 May 2005 (UTC)[reply]
By the way, you say that However, plants.usda.gov/classification states:, implying that they disagree. As far as I can see the wikipedia article is in agreement with the USDA. Bear in mind that classification is a moving target and as more data are collected the classification schemes may be adjusted. I assume this explains the differences between the above sources. This is even more reason to consult an expert. David D. 18:24, 11 May 2005 (UTC)[reply]
Yes, Wikipedia and the first USDA listings are virtually identical. Wikipedia taxoboxes do not give all of the super- and sub- levels on purpose to simplify the presentation. - Marshman
Sorry i just realised that you trying to find the phylum name, so, I agree, USDA is not really much help in that regard.David D. 18:27, 11 May 2005 (UTC)[reply]
Differences in the classifications given are at higher taxonomic levels and therefore not in any specific way related to the cotton plant. You would need to read the text for each level either here or in some other source to understand the arguments as to how these higher taxa are arrived at and supported (or not) by various botanists. I am confused by one aspect of your question: are you looking for the word "phylum" in each taxonomy example? Botany uses the term "division" for this level. Since all of the examples you give place the cotton plant in the Family Malvaceae, I see no important difference in the listings. The taxa above family are really pretty much determined by experience, habit, and personal preference, and as Daycd points out, always subject to a certain amount of flux as new information (and new interpretations) are put forth. - Marshman 19:01, 11 May 2005 (UTC)[reply]

Phylum

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I believe I can help with this. The International Code of Botanical Nomenclature has always specified the name Division be used until the last meeting (6 years ago). Now botanists are able to use the term Division and Phylum interchangably. The rank is the same so they cannot be used at the same time. The classification listed at bats.ch is incorrect.

Asside from that there is a moving window of classification. As we find more information about plant and animals the classifications change. In addition there are some botanist who do not wish to follow the nomenclature rules.

The Wikipedia article and Plants Database reflect a majority view of the classficiation of Cotton. The Plants Database just has additional, interculated ranks.

SteveC


Plant raising info

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I've got some cotton seeds (at about 10) and I wanted to plant them on a vase only for display. I was wondering if you could help me telling how many days the seeds need to sprout, how much time it would need to appear the first flowers, the right temperature, if the seed and the plant need special care on something, things like that. It would be interesting to add those to the article too. Thanks a lot for the help. Raquel Sama 17:29, 31 May 2006 (UTC)[reply]

I've bought a cotton plant, and I don't know if I need two to get good seeds or if they are self fertilzing. Does anyone know? It would be nice if someone could give me a web site that told you all the plants. thks```` —Preceding unsigned comment added by Rube Goldberg1234 (talk • contribs) 12:16, 19 June 2009 (UTC)[reply]

Genetics

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I learned in a class that this genus is tetraploid. Should this be noted in the article? Ninjatacoshell 17:20, 14 April 2007 (UTC)[reply]

Interesting, perhaps we should. You certainly know more than me, so:

  1. Do you know how unusual or notable it is?
  2. Do you happen to have a reference?

If so, go ahead I would guess. And welcome. Fred 17:38, 14 April 2007 (UTC)[reply]

Perhaps not that unusual. ~70% of grasses are polyploids and ~55% of flowers. And, no, I don't have a reference. Ninjatacoshell 06:13, 15 April 2007 (UTC)[reply]


I found a reference for this, but don't know enough biology to be able to incorporate it in the article.

Polyploidy and the Evolutionary History of Cotton. Jonathan F. Wendel(1) and Richard C. Cronn(2)

1) Department of Botany, Iowa State University, Ames, Iowa, USA. 2) Pacific Northwest Research St, USDA Forest Service, Corvallis, Oregon, USA. http://www.fs.fed.us/pnw/pubs/journals/WendelAdvAgron2002.pdf

The paper also confirms, from a genetic perspective, MacNeish's claim that cotton in the US originated in western Mexico. Cottonshirt (talk) 05:32, 20 July 2008 (UTC)[reply]

Common name

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Seems like this should be renamed "Cotton plant".--Doug.(talk • contribs) 04:00, 26 October 2007 (UTC)[reply]

function of fibers

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What is the biological function of the fibers? Do they help the seed travel from the plant, like a dandelion clock? Do they pad it? They're certainly not edible...why did the evolve?165.91.64.144 (talk) 00:55, 29 October 2009 (UTC)RKH[reply]

Sequencing status needs update

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The D genome has been sequenced.

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