Drepanocladus cardotii (Thér.) Hedenäs (1997:82)
Cardot's hook moss
Taxonomy & Nomenclature
Synonyms: Hypnum cardotii Thér. in Bot. Gaz. 30(2): 124 (1900); Campylium stellatum subsp. cardotii (Thér.) Grout in Moss Fl. N. Amer. 3: 81 (1931); Campylium cardotii (Thér.) Broth. in Nat. Pflanzenfam. I(3): 1043 (1908)
Conservation Status
Missing (Atwood, 2025; NatureServe, 2026)
Last (and only) record: 1898 (Atwood, 2025; NatureServe, 2026)
Still known only from the type locality where it was last recorded in 1898 (Hedenäs, 2014:295; Atwood, 2025; NatureServe, 2026). However, there exists a report of the species from southern Quebec, Canada in the 1940's (Jacques Labrecque pers. comm. to Bonnie Heidel, May 2001 fide Montana State Library, 2026).
Distribution & Habitat
Glacier National Park, Avalanche Basin, Flathead County, northwestern Montana, USA
Distribution may extend into southern Quebec, Canada (Montana State Library, 2026)
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Holzinger, J. M. (1900). Some new North American mosses. Botanical Gazette 30(2): 122-125, pl. XI, fig. 4.
Other references:
Atwood, John J. (2025). Drepanocladus cardotii (Thér.) Hedenäs. In: North American Bryophytes of Conservation Concern. Missouri Botanical Garden, St. Louis, U.S.A. https://legacy.tropicos.org/Project/BryoCon [Accessed on 17 August 2026]
Brinda, John C. and Atwood, John J. (eds.). (2026). The Bryophyte Nomenclator, 14 Jul 2026. Available at: https://www.bryonames.org/ [Accessed on 17 August 2026]
Brotherus, V. F. (1908). Bryales, in part, pp. 1009-1056. In: H. G. A. Engler & K. Prantl, Die Natürlichen Pflanzenfamilien I(3). Engelmann, Leipzig.
Buck, W. R. and Goffinet, B. (2024). A new checklist of the mosses of the continental United States and Canada. Bryologist 127(4): 484–549.
Crosby, M. R., Magill, R. E., Allen, B. H. and He, S. (2000). A Checklist of the Mosses. St. Louis, MO: Missouri Botanical Garden. vi + 320 pp.
Elliot, J. C. (1993). Second checklist of Montana mosses. Unpublished report. U.S. Forest Service, Region 1. Missoula, MT. 45 pp.
Elliott, J. C. and Pipp, A. K. (2020). A Checklist of Montana Mosses (1880-2018). Updated 3 January. Montana Natural Heritage Program, Helena, Montana. 73 pp.
Grout, A. J. (1931). Moss Flora of North America 3: 1-277. Author, Newfane, Vermont.
Hedenäs, Lars. (1997). A partial generic revision of Campylium (Musci). The Bryologist 100: 65-88.
Hedenäs, Lars. (2014). Amblystegiaceae, pp. 263-319 [295]. In: Flora of North America Editorial Committee (eds.). Bryophyta, part 2. 28: i-xxii, 1-702. Oxford University Press, New York.
Lawton, Elva E. (1971a). Moss Flora of the Pacific Northwest. Nichinan, Miyazaki, Japan: The Hattori Botanical Laboratory. i-xiii, 362 pages + 195 full-page plates. [p. 275; hardcover]
Lawton, E. (1971b). Keys for the Identification of the Mosses on the Pacific Northwest. Reprinted from 'Moss Flora of the Pacific Northwest'. Published as Supplement No. 2 of the Journal of the Hattori Botanical Laboratory. Nichinan, Miyazaki, Japan. 66 pp.
Montana State Library. (2026). Cardot's Hook Moss — Drepanocladus cardotii. Montana Field Guide. Montana Natural Heritage Program. Retrieved on August 17, 2026, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=NBMUS1J020
NatureServe. (2026). Drepanocladus cardotii: Cardot's Hook Moss. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed 17 August 2026]
Tropicos. (2026). Tropicos.org. Missouri Botanical Garden. 17 Aug 2026 <https://tropicos.org/name/35201017>
WFO. (2026). Drepanocladus cardotii (Thér.) Hedenäs. Published on the Internet. Available at: https://www.worldfloraonline.org/taxon/wfo-0001202016 [Accessed on 17 August 2026]