Argyrochosma lumholtzii
species of plant
Argyrochosma lumholtzii is a rare fern in the family Pteridaceae known from Sonora, Mexico. It is quite similar to Jones' false cloak fern, but has black leaf axes and a less highly divided leaf. First described as a species in 1939, honoring the explorer Carl Sofus Lumholtz, it was transferred to the new genus Argyrochosma in 1987.
Description
Argyrochosma lumholtzii is a small fern. Its rhizome is compact and upright. It bears linear or linear-ligulate (straplike) scales 4 to 5 millimeters (0.2 to 0.2 in) long, long-acuminate at the tip, somewhat twisted, of a uniform orange-brown or reddish-brown color, with entire (toothless) margins.
The fronds arise in clumps from the rhizome. They are 7 to 15 centimeters (2.8 to 5.9 in) long from the base to the tip of the leaf. Of this length, about two-thirds is made up by the stipe (the stalk of the leaf, below the blade), which is shiny and round, hairless, and black in color.
The leaf blades are deltate-lanceolate to deltate-ovate.
The public source identifies “Argyrochosma lumholtzii” as species of plant. This brief keeps that definition visible, then builds a research path around Argyrochosma, lumholtzii and species.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jul 4, 2026. The linked authority identifier is Q15598363. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1939 and 1987.
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This entry incorporates text from “Argyrochosma lumholtzii” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.