The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots.
| Crossosomatales | |
|---|---|
| |
| Staphylea colchica | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Clade: | Malvids |
| Order: | Crossosomatales Takht. ex Reveal[1] |
| Families | |
Description
editSpecies 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
editThe relationships between orders within the Malvid clade, according to the APG system, is represented by the following tree.[3]
| Malvids |
| ||||||||||||
Within the Crossosomatales, the APG III system of 2009 recognises families represented in the following tree.[4]
References
edit- ^ 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. hdl:10654/18083.
- ^ 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.