Rosa pisocarpa
Common name: 
Clustered Rose
Swap Rose
RO-za pie-zoh-KAR-puh
Native to (or naturalized in) Oregon: 
  • Broadleaf, deciduous shrub; may form a thicket and reach a height of 8 ft (2.5 m). Stems are generally black, sometimes dark red, with few paired prickles at nodes, each are usually straight and thick based.  Leaves alternate and odd-pinnately compound with 5-7 leaflets, each sharply pointed and single-toothed serrated.  Flower clusters carry 2-10 flowers, which are deep pink, small, about 1-2 cm across. The fruit (rose hip) is about 1 cm wide, gobe- or egg-shaped, with persistent sepals and stamens, and borne in clusters.

  • Sun to shade, a riparian species so it does well in moist, even water logged soils

  • Hardy to USDA Zone 7                    Native from southern British Columbia to northern California, mostly on the west side of the Cascades in BC and Washington, but more wide spread in Oregon and extending to a single county in northern Idaho.  Intergrades with R. californica , R. woodsii , R. nutkana

  • pisocarpus: with pea-like fruit, possibly a reference to its sometimes spherical (globe) shaped fruit. 
  • Corvallis: in Starker Arts Park; on the western end of the planting along the bike path which borders the constructed wetland south of the pond

Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • leaves


  • flower clusters, bud stage

    flower clusters, bud stage

  • flower


  • flower


  • flowers, comparison

    flowers, comparison

  • developing fruit

    developing fruit

  • mature fruit cluster, early fall

    mature fruit cluster, early fall

  • mature fruit with attached calyx

    mature fruit with attached calyx