| Crossosomatales | |
|---|---|
 | |
| Staphylea colchica | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Clade: | Malvids |
| Order: | Crossosomatales Takht. exReveal[1] |
| Families | |
TheCrossosomatales are an order, first recognized as such byAPG II. They areflowering plants included within theRosideudicots.
Species assigned to the Crossosomatales have in common flowers that are positioned solitarily, with the base of thecalyx,corolla, andstamens fused into a tube-shapedfloral cup, sepals overlapping, the outermost smaller than the inner. Insides of the casings ofpollen grains have horizontally extended thin regions (orendo-apertures). Thegynoecium is placed on a short stalk, papillae on the stigma consist of two or more cells,ovarylocules taper upwards, and the protective cell layer (orintegument) surrounding theovule leaves a zigzag opening (ormicropyle). Some cell clusters have bundles of long yellow crystals,mucilage cells are present, and seeds have a smooth, woody coating.[2]
The relationships between orders within the Malvid clade, according to the APG system, is represented by the following tree.[3]
| Malvids | |
Within the Crossosomatales, theAPG III system of 2009 recognises families represented in the following tree.[4]
| Crossosomatales | |
