Wood's Rose

Rosa woodsii

Rosa woodsii photo © by Mike Plagens

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

leaf gall on Rosa woodsii

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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.

Rosa woodsii photo © by Mike Plagens

Rosaceae -- Rose Family

More Information:

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Arizona Naturalist
Sycamore Canyons
The Flora of Arizona's Sycamore Canyons


Copyright Michael J. Plagens, page created 10 July 2009
updated 26 Oct. 2015