Dryadoideae

Dryadoideae
Dryas × suendermannii
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Subfamily: Dryadoideae
(Lam. & DC.) Sweet
Genera

The Dryadoideae subfamily of the Rosaceae consists of four genera,[1] all of which share root nodules that host the nitrogen-fixing bacterium Frankia.[2] They are sub-shrubs, shrubs, or small trees with a base chromosome number of 9, whose fruits are either an achene or an aggregate of achenes.[1]

Taxonomic history

The subfamily has at various times been separated as its own family (Dryadaceae), or as a tribe (Dryadeae) or subtribe (Dryadinae).[3]

Notes

  1. 1 2 Potter, D., et al. (2007). Phylogeny and classification of Rosaceae. Plant Systematics and Evolution. 266(1–2): 5–43.
  2. ↑ Swensen, S.M.; Mullin, B.C. (1997). The impact of molecular systematics on hypotheses for the evolution of root nodule symbioses and implications for expanding symbioses to new host plant genera. Plant and Soil. 194: 185–192.
  3. ↑ J. L. Reveal. "Indices Nominum Supragenericorum Plantarum Vascularium – RA-RZ".

External links

This article is issued from Wikipedia - version of the Friday, November 29, 2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.