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Conocephalum salebrosum
Snakewort
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Photographer: Dr. Amadej Trnkoczy
ID: 0000 0000 0221 0800 (2021-02-09)Copyright © 2021 Dr. Amadej Trnkoczy
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Apr 9, 2019
latitude 46.35866 longitude 13.70495
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location
Lower Trenta valley, between villages Soča and Trenta, in the Matevž's gorge, East Julian Alps (Posočje, Slovenia)notes Slo.: kačjekoži veliki jetrenjak - Habitat: Moderately incline mountain slope, southeast aspect; river bank, a few m above water level, mixed wood and bushes; humid, cold and shady place; calcareous, rocky ground, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 6-8 deg C, elevations 530 m (1.740 feet), alpine phytogeographical region. - Substratum: Rocks and soil covered by mosses. - Comment: Present day liverworts are the closest living relatives of the first land plants, which emerged about 500 million year ago. Conocephalum salebrosum is a species described no earlier than in 2005 (Ref. 6). It is a widespread liverwort. Pictures show male gametophyte (Conocephalum salebrosum is a dioecious species, that means, male and female plants are different). It is very similar to more common Conocephalum conicum and hence not easy to be separated from it in the field (Ref. 4 and 5). The main three diagnostic morphologic traits are the size of the thallus (C. salebrosum is smaller), shiny surface of the thallus of C. conicum, and more conspicuous borders between surface cells of the upper side of the thallus of C. salebrosum. - On my pictures one can also see also several antheridial pads (Fig. 15) as well as two brown 'buds' sheathed by scales at the apices of the thalli (overwintering stage, which develops new thalli) (Fig. 13, at the lower edge of the uppermost light green thallus lobe). Also pegged rhizoids (a primitive root-like structures) (Fig.20) which are dead at maturity and function as an effective external water‐conducting system are shown. A second type of rhizoids also exist with Conocephalum salebrosum, which are smooth and serve for nutrition and anchorage purposes. These dimorphic rhizoids are characteristic of the archaic, but nevertheless highly developed, complex thalloid liverworts (Ref.7). - Yet, I do not know what are the black pits in the thalli (Fig.13, 18) with black, beaked, pear-like structure in the middle. Even in the case that the pictures show a mix of male and female gametophytes, these structures don't look like stalked archegoniophores (the cone-shaped receptacles that bear sporangia) of the female plants. Is this a parasitizing fungus? - Ref.: (1) Personal communication with Guido Brusa via iNaturalist. (2) Ian Atherton, Ed., Mosses and Liverworts of Britain and Ireland - a field guide, British Bryological Society (2010), p255. (3) http://blogs.ubc.ca/biology321/?page_id=3358 (accessed February 6. 2021) (4) https://websites.rbge.org.uk/bbs/Recording/conocephalum/conoimages.htm (accessed February 6. 2021) (5) https://websites.rbge.org.uk/bbs/Recording/conocephalum/conosurvey.htm (accessed February 6. 2021) (6) J. Szweykowski, K. Buczkowska, I.J. Odrzykoski, Conocephalum salebrosum (Marchantiopsida, Conocephalaceae) - A new Holarctic liverwort species, 2005, Plant Systematics and Evolution 253(1):133-158 https://www.researchgate.net/publication/226397121_Conocephalum_salebrosum_Marchantiopsida_Conocephalaceae_-_A_new_Holarctic_liverwort_species (7) J. G. Duckett, R. Ligrone, K. S. Renzaglia, S. Pressel, (2013) Pegged and smooth rhizoids in complex thalloid liverworts (Marchantiopsida): structure, function and evolution, Botanical Journal of the Linnean Society, 2014, 174, 68–92., https://onlinelibrary.wiley.com/doi/epdf/10.1111/boj.12121 (accessed February 6. 2021)camera Nikon D700 / Nikkor Micro 105mm/f2.8
contributor's ID # Bot_1178/2019_DSC05589, Bot_1180/2019_DSC465 photo category: Plant - mosses/etc
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MORE INFORMATION ABOUT THIS PLANT
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| common names
Snakewort, Snake-skin Liverwort (photographer)
View all photos in CalPhotos of Conocephalum salebrosum Check Google Images for Conocephalum salebrosum |
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The photographer's identification Conocephalum salebrosum has not been reviewed. Click here to review or comment on the identification. |
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Using this photo The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2021 Dr. Amadej Trnkoczy.
For other uses, or if you have questions, contact Dr. Amadej Trnkoczy amadej.trnkoczy[AT]siol.net. (Replace the [AT] with the @ symbol before sending an email.) |
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