Dryadoideae | |
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Dryas × suendermannii | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Rosales |
Family: | Rosaceae |
Subfamily: |
Dryadoideae ( Lam. & DC.) Sweet |
Genera | |
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The subfamily Dryadoideae consists of four genera in the family Rosaceae, [1] all of which contain representative species with root nodules that host the nitrogen-fixing bacterium Frankia. [2] They are subshrubs, shrubs, or small trees with a base chromosome number of 9, whose fruits are either an achene or an aggregate of achenes. [1]
The subfamily has at various times been separated as its own family (Dryadaceae), or as a tribe (Dryadeae) or subtribe (Dryadinae). [3]