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Crossidium squamiferum var. pottioideum (De Not.) Mönk.  
Family: Pottiaceae
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Claudio Delgadillo M. in Flora of North America (vol. 27)
Leaves with margins recurved to erect and whitish distally, undifferentiated proximally. Seta 5-8 mm. Capsule urn short-cylindric, 1-2.1 mm; operculum 0.6-1.1 mm; peristome short, nearly straight, cribrose, 198-520 µm.

Capsule mature May-Aug(-Dec). Banks, sandy soil or rocks along dry washes; 1000-1500 m; Ariz., Calif., Colo., Nev., Utah; Mexico (Baja California); Europe; Asia; n Africa; Atlantic Islands (Canary Islands).

M. J. Cano et al. (1993) did not recognize var. pottioideum as a distinct taxon. However, the character states given in the key offer good reasons to retain it, despite some intergradation with var. squamiferum.
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This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].
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