Crossosomatales

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Crossosomatales
Familiae: Aphloiaceae - Crossosomataceae - Geissolomataceae - Guamatelaceae – Stachyuraceae - Staphyleaceae - Strasburgeriaceae

Name

Crossosomatales Takht. ex Reveal, Phytologia 74(3): 174. 1993.
Synonyms

Homotypic
Crossosomatales Takht. ex Reveal, Novon 2(3): 238. 1992. nom. inval.

Synonyms

Crossosomatinae Reveal
Geissolomatinae Reveal
Staphyleales Martius
Geissolomatales Reveal
Ixerbales

References

Reveal, J.L. 1993. New ordinal names for extant vascular plants. Phytologia 74(3): 173–177. BHL
Sosa, V. 2006. Crossosomataceae. Pp. 119–122 in Kubitzki, K. (ed.), The Families and Genera of Vascular Plants. Volume IX. Flowering Plants. Eudicots. Berberidopsidales, Buxales, Crossosomatales.... Springer, Berlin.
Sosa, V. & Chase, M.W. 2003. Phylogenetics of Crossosomataceae based on rbcL sequence data. Systematic Botany 28: 96–105.
Oh, S.-H. & Potter, D. 2006. Description and phylogenetic position of a new angiosperm family, Guamatelaceae, inferred from chloroplast rbcL, atpB, and matK sequences. Systematic Botany 31: 730–738.
Tropicos.org 2014. Crossosomatales. Missouri Botanical Garden. Published on the internet. Accessed: 2014 Jan. 29.
Stevens, P.F. 2001 onwards. Angiosperm Phylogeny Website. Version 14, July 2017 [and more or less continuously updated since]. Online. Reference page.

Vernacular names
italiano: Crossosomatali
македонски: Крососомовидни
русский: Кроссосомоцветные
中文: 缨子木目

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

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.
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.
Peter F. Stevens (2001). "Angiosperm Phylogeny Website".

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.

Angiosperm Phylogeny website