Calocedrus decurrens
This plant is limited to serpentine soils in the Klamath Mountains of southern Oregon. There are about eight occurrences on a serpentine ridge about 30 miles long, located in the South Umpqua River drainage. All the occurrences make up one single metapopulation. The habitat is meadows and the ecotone between grass-forb meadows and mixed coniferous forest. The plant grows in undisturbed habitat covered in litter and moss. The overstory is composed of "Pinus jeffreyi", "Pseudotsuga menziesii", "Calocedrus decurrens", and "Arbutus menziesii". Other forbs in the habitat may include "Perideridia oregana", "Lomatium nudicaule", "Madia madioides", "M. elegans", "Achillea millefolium", "Cryptantha intermedia", "Minuartia douglasii", "Silene hookeri", "Cerastium viscosum", "Lotus micranthus", "Luzula campestris", "Epilobium minutum", "Aspidotis densa", "Githopsis specularioides", "Ranunculus occidentalis", "Sedum stenopetallum", "Mimulus guttatus", "Collinsia grandiflora", "Castilleja tenuis", "Toxicoscordion venenosum", "Plectritis congesta", "Phacelia capitata", and "Viola hallii".