Overview

Distribution

National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Plants 3-11 × 0.9-3.2 mm. Stem unbranched and branched; axillary hyaline nodules absent; central strand usually present. Leaves as many as 20 pairs, lanceolate to oblong-lanceolate or oblong-lingulate, acute to short-acuminate or obtuse-apiculate, to 0.8-2.7 × 0.2-0.5 mm; dorsal lamina narrowed proximally, ending at or before insertion, infrequently slightly decurrent; vaginant laminae 1/2 leaf length, mostly equal; margin entire but often serrulate distally, limbate on all laminae, limbidium reaching apex or ending a few cells before or partially absent to infrequently completely absent, limbidial cells 1-3-stratose; costa excurrent to ending as many as 6 cells before apex, bryoides-type; laminal cells 1-stratose, distinct, smooth, often slightly bulging, firm-walled, irregularly hexagonal, a few elongate, 6.5-16 µm, somewhat larger in proximal parts of vaginant laminae. Sexual condition polyoicous; naked antheridia and archegonia often in axils of distal leaves. Sporophytes 1-2 per perichaetium. Seta 1.4-10 mm. Capsule theca exserted, erect, radially symmetric to ± inclined, bilaterally symmetic, 0.2-1.2 mm; peristome bryoides-type; operculum 0.5 mm. Calyptra cucullate smooth, to 0.5 mm. Spores 10-20 µm.
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Description

The Fissidens bryoides complex is very variable. Five varieties of Fissidens bryoides have been reported from China. It is quite difficult to identify these varieties, especially when only vegetative plants are present since the classification of the complex is mainly based on the sexuality and distribution of gametangia rather than on the types of limbidia (Iwatsuki & Suzuki 1982).
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Diagnostic Description

Synonym

Fissidens andersonii Grout; F. bryoides var. incurvus (Starke) Hübener; F. bryoides var. pusillus (Wilson) Pursell; F. exiguus Sullivant; F. exiguus var. falcatulus (Renauld & Cardot) Grout; F. pusillus (Wilson) Milde; F. synoicous Sullivant; F. texanus Lesquereux & James; F. viridulus (Swartz) Wahlenberg; F. viridulus var. pusillus Wilson; F. viridulus var. tamarindifolius (Turner) Grout; F. viridulus var. texanus (Lesquereux & James) Grout
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Synonym

Dicranum bryoides (Hedw.) Sw., Monthl. Rev. 34: 538. 1801. Schistophyllum bryoides (Hedw.) Lindb., Musci Scand. 13. 1879.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Fissidens bryoides

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Fissidens bryoides

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Notes

Comments

Fissidens bryoides is a veritable kaleidoscope of intergrading expressions. At one extreme is F. bryoides in the strict sense, with plants gonioautoicous and the limbidium, 1-3 cells thick, confluent at the leaf apex with the percurrent to short-excurrent costa. At the other extreme is the expression that has been singled out as F. exiguus, with plants rhizautoicous and the 1-stratose limbidium usually restricted to the vaginant laminae of perichaetial leaves. In rare cases the limbidium can be absent from all leaves. All expressions, however, have clear, distinct, 1-stratose, irregularly hexagonal laminal cells, 6.5-16 µm, that in transverse section are no deeper than wide, and that have smooth walls that can be slightly bulging. H. A. Crum and L. E. Anderson (1981) illustrated the major expressions found in the flora area. Axillary, multicellular gemmae have been reported in Indian specimens.
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