E-Flora BC: Electronic Atlas of the Flora of British Columbia

Amblystegium serpens var. juratzkanum (Hedw.) B.S.G
Jurkatzka's feathermoss (Juratzk's amblystegium moss)

Species Account Author: Wilf Schofield
Extracted from Some Common Mosses of British Columbia

Introduction to the Bryophytes of BC
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Distribution of Amblystegium serpens var. juratzkanum
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Two subspecies are reported in British Columbia:

1) Amblystegium serpens var. juratzkanum
2) Amblystegium serpens var. serpens

Species Information

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Illustration Source: Some Common Mosses of BC

Species description:
Genus name apparently derived from the blunt operculum; the species name referring to the creeping shoots.
Sporophytes frequent and often abundant, maturing in spring to early summer; sporophyte reddish brown or with sporangium green and curved when immature.
Distinguishing characteristics:
The slender, soft plants with leaves show­ing an inconspicuous single midrib are usually sufficient to distinguish this species, especially if it occurs on wood.
Reclining slender dark green to reddish-brown, thread-like stems forming interwoven mats, somewhat glossy (under lens); not changing markedly from moist to dry conditions, except that the leaves diverge outward when wet and are against the stem when dry.
Similar Species:
If on rock or soil, several genera might resemble it. Most require examination of microscopic features for discrimination: A. compactum has sharp teeth at the leaf base while A. serpens lacks them; Heteroc/adium macounii has papillose leaf cells when viewed under a com­pound microscope; most Campylium species that are the same size as the Amblystegium have leaves more spread when wet or dry; Kindbergia praelonga, when small, has a strong midrib in the leaves; Isothecium stoloniferum has toothed leaves, even in the slender forms of the size of A. serpens.

Habitat / Range

Frequent in swampy areas and on floodplains on soils, logs and tree bases (especially broad-leafed trees), occasionally on cliff shelves, from sea level (upper edge of saltmarsh) to subalpine forest; occasionally, as a weed, on damp, shaded lawns and in greenhouses. Seldom abundant.
World Distribution

Cosmopolitan in both Northern and Southern Hemispheres, especially in temperate to frigid climates throughout North America.

Synonyms and Alternate Names

Amblystegium juratzkanum var. giganteum (Grout) Grout
Amblystegium juratzkanum var. juratzkanum
Amblystegium serpens var. giganteum Grout

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

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General References