Status: Native
Synonyms:
Didymodon umbrosus (J. K. A. Müller) R. H. Zander
Barbula umbrosa J. K. A. Müller
Didymodon australasiae var. umbrosus (J. K. A. Müller) R. H. Zander
Trichostomopsis crispifolia Cardot
Trichostomopsis umbrosa has a long lanceolate leaf shape reminiscent of a Trichostomum species, but the fleshy leaf apex of a Didymodon rigidulus. The inflated pericostal cells and elongate marginal cells at the leaf base are different than either one of those species though. The upper leaf margin is bistratose. There are almost no papillae visible. The costal cross section is unusual for having an abaxial sterid band and two or three layers of
guide cells with a hint of an adaxial pad of cells on the costa. We found Trichostomopsis umbrosa on sand while climbing up a steep slope about 20 feet from a spring in the desert.
Many thanks to Kelly Allred for confirming this ID for us!
Please click on an image for a larger file.
Trichostomopsis umbrosa, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, closeup of habit, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of dry stem, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of wet stem, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf base, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf base, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf at mid lamina, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf apex, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of cross section of stem showing presence of central strand, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of pigmented first cell of axillary hair, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of adaxial costal cells near midlamina, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf cross section above hyaline base, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
Trichostomopsis umbrosa, photomicrograph of leaf cross section above hyaline base, photo Russ Kleinman & Karen Blisard, Doña Ana County, Jornada Experimental Range, San Andres Wildlife Refuge, Ropes Spring, May 11, 2022
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