Difference between revisions of "Rosaceae tribe Exochordeae"
J. Bot. Res. Inst. Texas 4: 215. 2010.
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|subfamily=Rosaceae subfam. Amygdaloideae | |subfamily=Rosaceae subfam. Amygdaloideae | ||
|tribe=Rosaceae tribe Exochordeae | |tribe=Rosaceae tribe Exochordeae | ||
Revision as of 00:31, 28 May 2020
Shrubs or trees; unarmed. Leaves alternate, simple; stipules absent or caducous (Oemleria), (rudimentary) free; venation pinnate. Flowers: perianth and androecium perigynous; epicalyx bractlets absent; hypanthium campanulate to turbinate or obturbinate; torus absent or minute; carpels [1–]5, distinct or connate, free, styles terminal, distinct; ovules 1 or 2, apical, collateral. Fruits capsules or aggregated drupes; styles not persistent, not elongate.
Distribution
North America, Asia
Discussion
Genera 3, species 8 or 9 (2 genera, 2 species in the flora).
The base chromosome number for Exochordeae is x = 8. Prinsepia Royle is Asian and is not present in North America. The tribal name Osmaronieae Rydberg, which pertains here, is illegitimate.
Selected References
None.
Key
| 1 | Plants synoecious; stipules usually absent; leaf blades membranous, margins entire or serrate in distal 1/2; carpels connate; fruits capsules. | Exochorda |
| 1 | Plants usually dioecious, rarely monoecious; stipules caducous; leaf blades coriaceous, margins entire; carpels distinct; fruits drupes. | Oemleria |