Selaginella arizonica
Arizona spikemoss is a mat-forming desert resurrection plant from the Sonoran Desert region of Arizona, west Texas and northwest Mexico. It grows in rock crevices, on ledges and on gravel, usually on north-facing slopes. It curls up grey and dry during drought and greens within hours of rain, so it needs bright light, a gritty mineral substrate and wet-dry cycles, not a closed humid terrarium.
Where it grows wild
Rock crevices, ledges, cliffs and open gravelly or rocky areas on igneous, volcanic or sandstone rock, rarely limestone. Observers often find it on north-facing slopes, in shadier spots between rocks and in washes. It forms loose, prostrate mats; the branch tips curl upward when dry and unroll after rain.
Flora of North America gives 600–2,000 m; the Arizona treatment in Canotia gives 600–1,700 m.
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The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.