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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Nomenclature and Classification Nomenclature and Classification. The current map showing distribution of species is only indicative. Does not include altitudinal distribution, which is covered under Habitat. Calyptrae 2- to 3-layered after fertilization. Weisnerellaceae Dumortiera hirsuta is a large thallose liverwort that grows in humid sites, often close to water. Basal tissue with few oil cells, without mucilage cavities. Current status It is likely that D.
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The floor of the air chambers becomes the exposed surface of the mature thallus. Antheridiophores with disk-shaped receptacle, with small ventral scales underneath and bristles on margins and dorsal side, stalk short, without assimilatory strip, with 2 rhizoid furrows; rarely, antheridial branches develop in the female receptacles.
Technology Biodiversity in India. Hjrsuta Red Data Books: Epidermal pores absent, or at thallus apex only, bounded by dumogtiera single ring of 4 cells, radial walls thin. A population may also have suffered from pollution of water dumrtiera by nutrient-enriched run-off from agricultural practice.
Sporophytes or more per involucre with slightly elongating seta. Bristles present on ventral thallus side and on gametangiophores. Involucres tubular, opening at top by a ventral-terminal slit, with bristles. 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.
Threats to the species are poorly understood, but elsewhere it is at risk from tree-felling activities that reduce humidity and shade and from water pollution.
Elaters with helical bands.
India Biodiversity Portal
Dunortiera structures receptacles occur near the thallus tip. The species is regarded as a priority for conservation in Northern Ireland because the British Isles and especially Ireland are the hisruta of its European range: Species specific search options Taxon Hierarchy.
What you can do The large thallose liverworts are easier to identify than many bryophytes, since with experience most of them can be determined using a x10 hand lens without needing microscopy. Atlas of the bryophytes of Britain and Ireland.
Bryophytes Liverworts: Dumortiera hirsuta
Species Description – Thallus mm wide, flat, deep green, not tinged with purple. This species, treated as a subspecies by Schuster bis characterized by crowded, papilliform cells on the dorsal surface of the thallus that hirshta to remnants of air chamber partitions. Awaiting further research, all neotropical specimens have been attributed to Dumortiera hirsuta sensu lato, thus including D.