Items 1 – 20 of Dumortiera hirsuta (Sw.) Nees you can join if you are interested in participating in a survey for species like Dumortiera hirsuta (Sw.) Nees. National Distribution. United States. Origin: Unknown/Undetermined. Regularity: Regularly occurring. Currently: Unknown/Undetermined. Confidence: Confident. Download scientific diagram | Dumortiera hirsuta (A) Gametophytic thalli (B) Disk shaped antheridia with bristles (C) archegoniophore with several sporophytes.
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Taylor, Hygrophila nepalensis Taylor, Dumortiera nepalensis T. Reproductive structures receptacles occur near the thallus tip. The species occurs in Western Europe, the Mediterranean region, Macaronesia, and widely in tropical regions of the world. Its name is derived from the presence of minute hairs at the thallus margins. Archegonia in stalked, terminal archegoniophores, up to 7 per archegonial cavity.
This species, treated as a subspecies by Schuster bis characterized by crowded, papilliform cells on the dorsal surface of the thallus that correspond to remnants of air chamber partitions. Sporophytes only occur occasionally in the British Isles, ripening from May to September, with up to nine capsules on each receptacle. User Group specific search options Title. Similar species Although the occurrence of receptacles shows that Dumortiera is a member of the Marchantiales, it differs from most other large hirsutta liverworts of this advanced order by lacking obvious air chambers and pores on the upper surface of the thallus.
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Natural History Natural History. Involucres tubular, opening at top by a ventral-terminal slit, with bristles.
Branching dichotomous and apical. The floor of the air chambers becomes the exposed surface of the mature thallus. Uses and Management Uses and Management.
Species specific search options Taxon Hierarchy. There are no conspicuous air chambers or pores on the upperside of the thallus but its margins have a fringe of tiny hairs. Dumortiera hirsuta is a large thallose liverwort that grows in humid sites, often close to water.
Hirsuga description The large dark green thalli are up to 12cm long and 2cm wide and these may form large mats or become pendent on hirsita substrata.
User specific search options User. The distribution of bryophytes in Ireland. Search in all groups Search within this group.
If refound, ensure that the population is maintained through appropriate habitat management. The species is regarded as a priority for conservation in Northern Ireland because hhirsuta British Isles and especially Ireland are the stronghold of its European range: Technology Biodiversity in India.
Send a request for permission. British Red Data Books: Overview Overview Diagnostic Diagnostic Keys. The male receptacle is up to 5mm in diameter with a stalk about 1mm high, the female receptacle up to 9mm diameter on a stalk up to 50mm tall. The thalli are dull not glossy when dry, almost flat above, with a pattern of fine ridges.
However, in sterile condition the species may be difficult to distinguish from Monoclea gottschei see under the latter species. Related observations Show all. Contact the British Bryological Society with any potential records.
Sexes may be on separate plants dioicous or different branches of the same plant autoicous. The current map showing distribution of species is only indicative. Does not include altitudinal distribution, which is covered under Habitat. Weisnerellaceae Dumortiera hirsuta is a large thallose liverwort dumortierw grows in humid sites, often close to water.
Epidermal pores absent, or at thallus apex only, bounded by a single ring of 4 cells, radial walls thin. Current status It is likely that D.
Liverworts Hepaticae and Anthocerotae. Enumerates geographic entities where the taxon lives.
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Powered by the open source Biodiversity Informatics Platform. How to see this species The only locality known in Northern Ireland is in Glenarm Glen, where it was found in on dripping rock by the river in a wooded ravine. Checklists specific search options Observed during. Archegoniophore stalk long, without assimilatory strip, with 2 rhizoid furrows and small scales at top; receptacle shallowly 6- to lobed, without or with few epidermal pores, sometimes with open cavities bounded by a ring of cells, with bristles on margins and dorsal side.
Best supported on Google Chrome, Firefox 3. Remember me Forgot password? Negative impacts on humans, communities. Three cytotypes are known, but chromosome counts are not available for neotropical material. Atlas of the bryophytes of Britain and Ireland. Technology partner Strand Life Sciences.