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Crossosomatales

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The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots.

Description

Species assigned to the Crossosomatales have in common flowers that are positioned solitarily, with the base of the calyx, corolla, and stamens fused into a tube-shaped floral cup, sepals overlapping, the outermost smaller than the inner. Insides of the casings of pollen grains have horizontally extended thin regions (or endo-apertures). The gynoecium is placed on a short stalk, papillae on the stigma consist of two or more cells, ovary locules taper upwards, and the protective cell layer (or integument) surrounding the ovule leaves a zigzag opening (or micropyle). Some cell clusters have bundles of long yellow crystals, mucilage cells are present, and seeds have a smooth, woody coating.[2]

Taxonomy

The relationships between orders within the Malvid clade, according to the APG system, is represented by the following tree.[3]

Malvids    

Geraniales

   

Myrtales

       

Crossosomatales

     

Picramniales

     

Sapindales

     

Huerteales

     

Brassicales

   

Malvales

             

Within the Crossosomatales, the APG III system of 2009 recognises families represented in the following tree.[4]

Crossosomatales        

Strasburgeriaceae

   

Geissolomataceae

       

Aphloiaceae

       

Staphyleaceae

     

Guamatelaceae

     

Stachyuraceae

   

Crossosomataceae

         

References

  1. ^ Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Archived from the original (PDF) on 2017-05-25. Retrieved 2013-07-06.
  2. ^ Matthews M.R, Endress P.K (2005). "Comparative floral structure and systematics in Crossosomatales (Crossosomataceae, Stachyuraceae, Staphyleaceae, Aphloiaceae, Geissolomataceae, Ixerbaceae, Strasburgeriaceae)". Botanical Journal of the Linnean Society. 147 (1): 1–46. doi:10.1111/j.1095-8339.2005.00347.x.
  3. ^ Peter F. Stevens (2001). "Angiosperm Phylogeny Website".
  4. ^ Oh, S.H. (2010). "Phylogeny and systematics of Crossosomatales as inferred from chloroplast atpB, matK, and rbcL sequences". Korean Journal of Plant Taxonomy. 40 (4): 208–217. doi:10.11110/kjpt.2010.40.4.208.
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Crossosomatales: Brief Summary

provided by wikipedia EN

The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots.

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cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
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wikipedia EN