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Aspidotis densa
Also called Pod Fern, Dense Lace Fern, Serpentine Fern
Aspidotis densa is a species of fern in the Cheilanthoid subfamily, known by the common name Indian's dream or Serpentine fern or dense lace fern. It is native to the west coast of North America from British Columbia to California and east to the Rocky Mountains in Idaho, Montana, and Wyoming; there is a disjunct population on serpentine soils in Quebec.
A. densa grows in rocky areas, usually on serpentine soils on rocky mountain slopes, well-drained but seasonally moist. It is usually found in growing full sun, but it can tolerate some shade. It can grow in rock crevices and exposed rocky outcrops in mossy cracks, and over time may creep to fill in fissures, creating well-established colonies in the outcrop. Though it grows mostly on serpentine, A. densa is also found on other rocks and soil types. There are numerous occurrences of this species west of Victoria, British Columbia on mafic (basalt) hills where no ultramafic rock, including serpentine, is mapped.
Text excerpted from the Wikipedia article Aspidotis densa by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
