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Taxon  Report  
Grimmia laevigata  (Brid.) Brid.
Grimmia dry rock moss
Grimmia laevigata is a moss that is native to California.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Genus: Grimmia
Family: Grimmiaceae  
Category: bryophyte  
PLANTS group:Moss

Name Status:
Accepted by PLANTS

Alternate Names:
TNRSGrimmia campestris
usdaGrimmia glauca
Information about  Grimmia laevigata from other sources
USDA PLANTS Profile (GRLA5)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

[britishbryologicalsociety.org.uk] Description, Identification Information: Hoary-looking blackish patches on hard stone/masonry mark Grimmia laevigata out as ?something different?. Although it quite often grows with the likes of Grimmia pulvinata and G. trichophylla, it lacks capsules and doesn?t much resemble either of them. With a hand-lens, you?ll be able to see that the leaves look dark green to blackish and opaque (because they are bistratose) and the lower nerve is not at all obvious. While the hair-point can be quite variable in length, it is very white-looking, rigid and spinosely toothed. Microscopically, the leaves have an unusual shape (for a Grimmia), with a wide, sheathing base and a wide, concave appearance. Leaf sections (see below) are really distinctive and should easily confirm this species. (link added by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 07/20/2024).