| 词条 | Dryadoideae |
| 释义 |
| image = Dryas drummondii6.jpg | image_caption = Dryas × suendermannii | taxon = Dryadoideae | authority = (Lam. & DC.) Sweet | subdivision_ranks = Genera | subdivision =
}} 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 subshrubs, shrubs, or small trees with a base chromosome number of 9, whose fruits are either an achene or an aggregate of achenes.[1] Taxonomic historyThe subfamily has at various times been separated as its own family (Dryadaceae), or as a tribe (Dryadeae) or subtribe (Dryadinae).[3] References1. ^1 {{cite journal | vauthors = Potter D, Eriksson T, Evans RC, Oh S, ((Smedmark JEE)), Morgan DR, Kerr M, Robertson KR, Arsenault M, Dickinson TA, Campbell CS | year = 2007 | title = Phylogeny and classification of Rosaceae | journal = Plant Systematics and Evolution | volume = 266 | issue = 1–2 | pages = 5–43 | doi = 10.1007/s00606-007-0539-9}}. 2. ^{{cite journal | vauthors = Swensen SM, Mullin BC | year = 1997 | title = The impact of molecular systematics on hypotheses for the evolution of root nodule symbioses and implications for expanding symbioses to new host plant genera | journal = Plant and Soil | volume = 194 | issue = 1/2 | pages = 185–192 | doi = 10.1023/A:1004240004063 | jstor = 42948119}}. 3. ^{{cite web|url=http://www.plantsystematics.org/reveal/pbio/fam/famRA-RZ.html|title=Indices Nominum Supragenericorum Plantarum Vascularium – RA-RZ|author=J. L. Reveal|author-link=J. L. Reveal}} External links
2 : Dryadoideae|Rosid subfamilies |
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