Helodium blandowii

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Helodium blandowii
Helodium blandowii.jpg
Status TNC G5.svg
Secure  (NatureServe)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Division: Bryophyta
Class: Bryopsida
Subclass: Bryidae
Order: Hypnales
Family: Helodiaceae
Genus: Helodium
Species:
H. blandowii
Binomial name
Helodium blandowii

Helodium blandowii, also known as Blandow's helodium moss, [1] Blandow's tamarisk-moss, [2] Blandow's bogmoss, and Blandow's feathermoss, is a rare plant in the Western U.S., including Oregon and California. It occurs all around the northern hemisphere in higher latitudes, and in some places is not as rare as in the Western U.S.

Contents

Technical description

Distribution, habitat, and ecology

This species has a circumboreal distribution. [3]

The habitat of Blandow's bogmoss is montane minerotrophic or "moderately rich" fens or mires, usually with calcareous groundwater, where it forms mats and small hummocks; sometimes it can be found under graminoids and shrubs at the edges of these aquatic features, or within them in small rivulets. Associated vascular plants include Agrostis idahoensis , Betula glandulosa , Salix geyeriana , Carex limosa , Eleocharis pauciflora , and Scheuchzeria palustris . Associated mosses include Aulacomnium palustre , Calligeron stramineum , Hamatocaulis vernicosus , Meesia triquetra , Tomenthypnum nitens , Philonotis fontana , Drepanocladus vernicosus , and Hypnum lindbergii . Fens with Scorpidium spp. or Drepanocladus revolvens , however, are too ion-rich, and not suitable habitat for H. blandowii. [3] [6] [8] [9]

The species was declared extinct across the British Isles in 1901 and has not been recorded there since. [10] [11]

The fire ecology of this plant is not known; however, fens rarely burn. Excess soot from a nearby fire, however, might negatively affect habitat quality.

Conservation status and threats

U.S. Forest Service Pacific Southwest Region Sensitive Species.

California Native Plant Society List 2.3

NatureServe California State Rank: S1.3; Global Rank: G5

Fens are delicate habitats susceptible to impacts from livestock grazing, hydrologic alteration, construction and continued use of roads, and peat mining. [3] Hydrologic alteration has caused the "well-documented extinction" of this species in Britain. [12]

Field identification

This species is superficially similar to other, somewhat related mosses, but presence in a fen habitat significantly helps in identifying this moss. Its feather-like, flattened stems and branches are distinctive, as are its yellow-green colour and the presence of dense paraphyllia on the stems. The pale, yellow-green colour might at first glance look like Sphagnum , but H. blandowii can be distinguished by its pinnate growth habit, as opposed to the fasciculate habit of Sphagnum. [3] [5] [7]

Related Research Articles

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<i>Sphagnum fallax</i> Species of moss

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<i>Sphagnum fuscum</i> Species of moss

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<i>Sphagnum cuspidatum</i> Species of moss

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<i>Warnstorfia exannulata</i>

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References

  1. USDA, NRCS (n.d.). "Helodium blandowii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 4 February 2016.
  2. Edwards, Sean R. (2012). English Names for British Bryophytes. British Bryological Society Special Volume. Vol. 5 (4 ed.). Wootton, Northampton: British Bryological Society. ISBN   978-0-9561310-2-7. ISSN   0268-8034.
  3. 1 2 3 4 5 Christy, John A.; David H. Wagner (1996). "VII". Guide for the Identification of Rare, Threatened, or Sensitive Bryophytes in the Range of the Northern Spotted Owl, Western Washington, Western Oregon, and Northwestern California: A Cooperative Project of the Eugene District, USDI Bureau of Land Management; Siuslaw National Forest, USDA Forest Service; The Nature Conservancy; and the Northwest Botanical Institute. pp.  34.
  4. Lawton, Elva (1971). "Moss Flora of the Pacific Northwest". Journal of the Hattori Botanical Laboratory. Supplement No. 1: 261.
  5. 1 2 Flowers, Seville; Arthur H. Holmgren (1973). "Helodium". Mosses: Utah and the West. The Blackburn Press. p. 399.
  6. 1 2 Vitt, Dale H.; Janet E. Marsh; Robin B. Bovey (1988). "Helodium blandowii". Mosses, Lichens, and Ferns of Northwest North America. Lone Pine Publishing. p. 85.
  7. 1 2 Norris, Daniel H.; James R. Shevock (2004). "Contributions toward a Bryoflora of California: II. A Key to the Mosses". Madroño. 51 (2): 198.
  8. "Helodium blandowii". California Native Plant Society. Archived from the original on June 22, 2017. Retrieved March 27, 2018.
  9. Seyer, Susan C. (1979). "New Moss Species from Crater Lake National Park, Oregon". The Bryologist. 82 (9): 82–83. doi:10.2307/3241974. JSTOR   3241974.
  10. "Species Recovery Trust – Lost Life". Archived from the original on 2019-04-28. Retrieved 2019-07-05.
  11. "British Bryological Society". Archived from the original on 2019-05-31. Retrieved 2019-07-05.
  12. Porky, Ron; Nick Hodges (2005). "The Dawn of Bryophytes". Mosses and Liverworts. Collins. p. 53.