- Parnassia californica
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- Pedicularis attollens
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- Pedicularis groenlandica
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- Pellaea bridgesii
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- Penstemon floridus
- Penstemon labrosus
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- Penstemon laetus
- Penstemon newberryi
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- Penstemon patens
- Penstemon rostriflorus
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- Penstemon rydbergii var. oreocharis
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- Penstemon scapoides
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- Penstemon speciosus
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- Perideridia parishii
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- Peucephyllum schottii
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- Phacelia curvipes
- Phacelia fremontii
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- Phacelia hastata
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- Phacelia ramosissima
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- Philadelphus lewisii
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- Phlox diffusa
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- Phlox stansburii
- Phyllodoce breweri
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- Pinus albicaulis
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- Pinus balfouriana
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- Pinus contorta
- Pinus contorta ssp. murrayana
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- Pinus jeffreyi
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- Pinus longaeva
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- Pinus monophylla
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- Plantago lanceolata
- Platanthera leucostachys
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- Platanthera sparsiflora
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- Polemonium occidentale
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- Polygonum bistortoides
- Populus balsamifera ssp. trichocarpa
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- Populus tremuloides
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- Potentilla fruticosa
- Potentilla glandulosa
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- Potentilla gracilis
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- Prunella vulgaris
- Prunus andersonii
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- Prunus emarginata
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- Picture 3 (fruits)
- Pseudotsuga menziesii
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- Pteridium aquilinum var. pubescens
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- Purshia tridentata var. glandulosa
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- Purshia tridentata var. tridentata
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- Pyrola asarifolia
- Pyrrocoma apargioides
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