Wood's Rose
Rosa woodsii
Observed at Sycamore Creek in the Pine Mountain Wilderness, Yavapai Co., Arizona, USA. 07 June 2009.
Occasionally leaves and/or shoots will be found with enlarged swellings resembling a pea or small fruit. Within are minute cynipid wasp larvae that are the causative agents:
Rose Pea Gall
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FLOWERS: Usually five large showy petals, frequently pink in color,
surrounding numerous stamens at center. Blooming spring and early summer.
LEAVES: Pinnate leaves divided into three or five leaflets. The leaflets
are toothed on their margins.
SHRUB: A woody shrub, often with sparse, rambling branches occasionally
almost two meters in height, but usually
much shorter.
RANGE: In Arizona's sycamore galleries this plant tends to occur on the
deep soil of terraces adjacent to the main channel in the partial shade of
bigger trees. It is more likely at higher elevations above 1500 m. and is
more common on hillsides up slope in ponderosa woodlands.
FRUIT: A rose hip - an enclosure formed from a partly fleshy hypanthium
(derived from stem tip). Within the hip are hard seeds each derived from
separate ovules (achene).
ARMED. Stems have varying numbers of weak prickles.
Rosaceae -- Rose Family
More Information:
- Southwest Environmental Information Network
- Southwest Colorado Wildflowers
- USDA Plant Profile
- ITIS Taxonomic Report
- Google Images
- Google Scholar Literature Search