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Pinus ponderosa / Physocarpus malvaceus Forest | Western Ecology Working Group of...
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Name: Pinus ponderosa / Physocarpus malvaceus Forest
Reference: Western Ecology Working Group of...
Description: This plant association is known from stands within the Idaho Batholith, Bitterroot Mountains, and Palouse Prairie ecoregional sections. The association is found on moderately steep northwest- to northeast-facing slopes, below 3000 feet elevation. The natural fire disturbance regime is one of frequent, low intensity fire events. Pinus ponderosa / Symphoricarpos albus is adjacent on hotter, drier south-facing slopes. Pseudotsuga menziesii / Physocarpus malvaceus is adjacent on more moist sites. Pinus ponderosa occurs with a structurally and compositionally diverse understory shrub layer. Symphoricarpos albus, Spiraea betulifolia, and Mahonia repens form an understory low-shrub canopy. Physocarpus malvaceus or Holodiscus discolor dominate the understory tall-shrub layer; Ceanothus sanguineus, Philadelphus lewisii, Prunus virginiana, and Amelanchier alnifolia are often associated. Highly consistent herbaceous species include Galium boreale, Moehringia macrophylla (= Arenaria macrophylla), Osmorhiza berteroi (= Osmorhiza chilensis), Erythronium grandiflorum, Calamagrostis rubescens, and Carex geyeri. 
Accession Code: VB.CC.24746.PINUSPONDEROSAP
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Nov-2014
      Names:   Translated: Ponderosa Pine / Mallow-leaf Ninebark Forest
  UID: ELEMENT_GLOBAL.2.687498 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000189
  Scientific: Pinus ponderosa / Physocarpus malvaceus Forest
(convergence) and Synonyms:
(undetermined) Pinus ponderosa / Physocarpus malvaceus Forest