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Diphyscium foliosum

(Diphyscium Moss)

Common Names

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Common Names in English:

Diphyscium Moss

Description

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Family Buxbaumiaceae

Plants microscopic, annual or perennial from persistent protonema. Archegoniate plants composed of a perichaetium of a few, mainly non-chlorophyllose ecostate leaves that enclose very few archegonia. Antheridial plants reduced to a 1-stratose, 2-lipped structure enclosing a single spherical antheridium, arising from a short branch of the protonema. Seta elongate . Capsule usually obliquely oriented, upper face flat or bulging and often distinguished from lower face by a perimeter ridge , broadly ovate to lance-cylindric; operculum conic, nearly perpendicular to upper face of capsule; peristome with endostome 16-pleated, a hyaline cone, exostome of one or more rows of articulated teeth, irregular in number, sometimes rudimentary . Calyptra smooth , conic, barely covering operculum, early deciduous.

Genus 1, species 12 (4 in the flora ) : widely distributed in temperate to subtropical regions of the Northern Hemisphere, scattered in the tropics, Pacific Islands (New Zealand), Australia.[1]

Genus Diphyscium

Plants gregarious , forming compact short turf . Leaves lingulate , costate , 1-2-stratose, distal cells chlorophyllose, quadrate to isodiametric, thick-walled and papillose or mammillose or smooth , proximal cells rectangular, hyaline , smooth. Perigonial leaves similar to vegetative leaves, except that interior are reduced and enclose paraphyses, axillary hairs , elongate antheridia. Perichaetial leaves long-awned with awn smooth or spinulose , awn often longer than lamina, with laminal apex lacerate and ciliate , when without sporangium strongly imbricate and penicellate, enclosing paraphyses, axillary hairs, few archegonia. Calyptra conic, barely covering operculum .

Species 12: North America, Mexico, West Indies, Central America, s South America, Europe, Asia, Atlantic Islands (Azores, Madeira ), Pacific Islands, Australia.

Diphyscium is the most widespread genus in the family and is mainly temperate to subtropical . It is sufficiently distinctive and unlikely to be confused with any other genus in North America if perichaetia or sporophytes are present. Vegetative material is superficially similar to that of the Pottiaceae, especially in leaf form and papillosity. Fortunately, perichaetia and sporophytes are frequent in the eastern range of the genus, while turf firmly cemented by rhizoids is a trait not shared by Pottiaceae in the same range.[2]

Physical Description

Species Diphyscium foliosum

Plants dark green to brownish, dull , forming hard tufts. Stems unbranched, erect , 0.5-1 mm, strongly radiculose . Leaves 0.5-4 mm, crisped and imbricate when dry, margins entire or weakly toothed with papillae, apex blunt , the most proximal leaves shorter than the most distal, laminal cells mammillose or papillose through most of lamima. Perichaetial leaves brownish when mature , with spinulose awn , lamina at awn base lacerate and membranaceous . Capsule broadly ovoid , (2-) 3-4 mm, stomata phaneropore near capsule base ; mature sporangium emergent from spreading perichaetium . Spores 6-8 µm. Capsules mature early summer. [source]

In western North America, Diphyscium foliosum is terrestrial in tundra sites, often in blowouts ; it is also found as humid perpendicular sods pendent from ledges and on rock in canyon walls; in eastern North America it is found on banks and horizontal surfaces in forests . The unique golf-tee-like protonemal flaps, which can be excavated from the rhizoids, are a distinctive family trait . [source]

Habit: Nonvascular

Habitat

Soil banks and soil of forest floors, also in tundras ; low to moderate elevations (50-1000 m )[3].

Taxonomy

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Unambiguous Synonyms

  1. Buxbaumia foliosa Hedwig, Sp. Musc. Frond. , 166. 1801

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 19-Jul-2004

Similar Species

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Members of the genus Diphyscium

There are approximately 27 species in this genus:

D. buckii · D. chiapense · D. chiapense subsp. unipapillosum · D. cumberlandianum (Cumberland Diphyscium Moss) · D. domingense · D. falcifolium · D. fasciculatum · D. fendleri · D. foliosum (Diphyscium Moss) · D. fulvifolium · D. granulosum · D. involutum · D. longifolium · D. lorifolium · D. mucronifolium · D. perminutum · D. peruvianum · D. pocsii · D. rhynchophorum · D. rotundatifolium · D. rupestre · D. satoi · D. sessile · D. submarginatum · D. suzukii · D. ulei · D. unipapillosum

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 27, 2008:

Identifiers

Footnotes

  1. Wilfred B. Schofield "Buxbaumiaceae". in Flora of North America Vol. 27 Page 118. Oxford University Press. Online at EFloras.org. [back]
  2. "Diphyscium". in Flora of North America Vol. 27 Page 162, 163. Oxford University Press. Online at EFloras.org. [back]
  3. "Diphyscium foliosum". in Flora of North America Vol. 27 Page 163, 164. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 2009-04-24