Crossosomatales
| Crossosomatales | |
|---|---|
| File:Staphylea colchica.jpg | |
| Staphylea colchica | |
| Scientific classification Edit this classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Clade: | Malvids |
| Order: | Crossosomatales Takht. ex Reveal[1] |
| Families | |
The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots.
Description
[edit | edit source]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
[edit | edit source]The 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]
| Crossosomatales | |
References
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