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 to 85 × 5 mm. Stem mostly branched; axillary hyaline nodules absent; central strand present. Leaves as many as 60 pairs, somewhat undulate, oblong to lanceolate, acute, occasionally obtuse, to 3.5 × 1.2 mm; dorsal lamina rounded or narrowed proximally, ending at insertion, not decurrent; vaginant laminae 1/2-3/5 the leaf length, ± equal, minor lamina ending on or near margin; margin crenulate to regularly serrulate but irregularly serrate distally, elimbate; costa ending 2-3 cells before apex to percurrent, taxifolius-type; laminal cells usually 1-stratose, infrequently and irregularly 2-stratose in the dorsal and ventral laminae, distinct, smooth, ± plane, firm-walled, irregularly quadrate to hexagonal, 10-20 µm, 1-5 marginal rows usually thinner with slightly thicker walls, forming a lighter marginal band, juxtacostal cells larger, mostly oblong and pellucid; vaginant laminal cells somewhat larger. Sexual condition dioicous (?); perigonia not seen; perichaetia on short axillary branches, generally confined to proximal half of stems. Sporophyte 1 per perichetium. Seta to 25 mm. Capsule theca mostly ± inclined, ± arcuate, bilaterally symmetric, to 1.5 mm; peristome taxifolius-type; operculum to 1.5 mm. Calyptra cucullate, smooth, to 2.5 mm. Spores 13-22 µm.
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Diagnostic Description

Synonym

Fissidens adianthoides var. immarginatus Lesquereux & James
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Fissidens adianthoides

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 adianthoides

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 8
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

The usually 1-stratose, distinct, smooth, plane laminal cells, lighter band of marginal laminal cells, and short perichaetial stems in the axils of proximal leaves distinguish Fissidens adianthoides. The species, nevertheless, can be confused with F. osmundioides, which has similar laminal cells without a marginal band of lighter cells and a serrate leaf apex, but which differs in having terminal perichaetia and papillose rhizoids. Fissidens dubius, which also has short perichaetial stems in the axils of proximal leaves and often a lighter band of marginal laminal cells, differs from F. adianthoides in its smaller and rather obscure laminal cells that are consistently irregularly 2-stratose. Fissidens adianthoides and F. dubius (as F. cristatus), according to cytological evidence presented by L. E. Anderson and V. S. Bryan (1956), are distantly related.
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