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Argyrochosma (J. Smith) Windham. Powdery Cloak Fern.

Key to Argyrochosma

A genus of about 30 species, of s. North America, Central America, South America, and the West Indies. Traditionally treated as a component of Notholaena (or sometimes Pellaea) (Tryon, Tryon, & Kramer in Kramer & Green 1990), but best recognized as a separate genus (Windham in FNA 1993b, Windham 1987, Gastony & Rollo 1998). Molecular studies show that this group is more closely related to Pellaea and Astrolepis than to Notholaena.

ID notes:Argyrochosma has highly compound leaves (3-5-pinnate) with tiny ultimate segments (these < 4 mm wide) that may or may not have a dense covering of farina (waxy powder) on the lower surface. Our species occur on or associated with calcareous rock outcrops.

Ref: Gastony & Rollo (1998); Kramer & Green (1990); Sigel et al. (2011); Tryon, Tryon, & Kramer In Kramer & Green (1990); Windham (1987); Windham (1993b) In Flora of North America Editorial Committee (1993b). Show full citations.

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image of plant© Brad Von Blon, some rights reserved (CC BY), uploaded by Brad Von Blon | Argyrochosma dealbata source | Original Image ⭷
image of plant© Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist | Argyrochosma dealbata source | Original Image ⭷
image of plant© Michelle, some rights reserved (CC BY), uploaded by Michelle | Argyrochosma dealbata source | Original Image ⭷

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