Erwin Gruber

Enthusiast for living creatures

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  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Image of Equisetum laevigatum:

    Equisetum laevigatum is looking much similar to E. hyemale, thus is nearby impossible to identify by images. The arrangement of silica-tuberles at shoot-surface is best feature to separate these spp. They are arranged in +- irregular rows transversely to shoot-axis or to some angle, more rounded and sometimes confluent in rows at E. laevigatum (as in E. ramosissimum). E. hyemale got silica tuberles quite strict in 2 rows along the ridges (ex my memory). If i do remember right, E. laevigatum does lose its sheat-teeth readily, whereas E. hyemale ssp. affine tends to keep them. Colour of shoots for usual is different, more light green to somewhat yellowish in E. laevigatum, and dark green in E. hyemale, whose shoots may grow thicker and higher, but this feature is very variable, depending on clones and habitats (own experience).

    almost 4 years ago

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    Erwin Gruber commented on "Image of an unknown taxon":

    It is not possible to determine the species by the image, it may be either Equisetum laevigatum or E. hyemale subsp. affine. See my annotations to species-characterisation.

    almost 4 years ago

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    Erwin Gruber commented on an older version of Image of Equisetum arvense:

    image quality too low for secure identification

    almost 4 years ago

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    Erwin Gruber commented on an older version of File:Equisetum hyemale detail 01 by Line1.jpg:

    "Equisetum camtchatkense" is synonym to E. hyemale subsp. affine from N America and E Asia, which in general is bigger than subsp. hyemale.

    almost 4 years ago

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    Erwin Gruber commented on an older version of File:Equisetum hyemale 1 beentree.jpg:

    This is Equisetum fluviatile, Water Horsetail.

    almost 4 years ago

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    Erwin Gruber commented on an older version of File:Equisetum hyemale in spring.jpg:

    In some part of the image It looks as if there was some parasitic Stamnaria americana Massee & Morgan, restricted to growing solely on Equisetum hyemale, or Stamnaria laetissima (Cesati) ined.! (me, curator), inhabiting Eq. subgen. Hippochaete, which of i identified the subsp. tenuispora ined.! (me, curator) from locations in NW-Russia and S Finland. The ineditioned taxa are pending for the attended publication, noted associations are tentative since i may not see the spots clearly enough. Addendum: I am sure to have seen any parasitic Stamnaria sp. in small spots, but may not identify the species and add it being associated with its host, since there are no entries for those species yet, i will change this within short!

    almost 4 years ago • edited: almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of an unknown taxon":

    It is in fact Equisetum fluviatile, Water Horsetail, which is proved by high res. image at original source.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of an unknown taxon":

    It is in fact Equisetum fluviatile, Water Horsetail, which is proved by high res. image at original source.

    almost 4 years ago • edited: almost 4 years ago

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    Erwin Gruber commented on "Image of an unknown taxon":

    The imaged individual may! in fact be Polystichum aculeatum, but as well some other Polystichum sp., this may not be proved by the small image!

    almost 4 years ago

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    Erwin Gruber commented on an older version of n307_w1150:

    Accepted combination is Polystichum lonchitis (L.) Roth

    almost 4 years ago

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    Erwin Gruber commented on an older version of Polystichum dudleyi with P. californicum and P. munitum:

    all three titled species trusted

    almost 4 years ago

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    Erwin Gruber commented on an older version of File:Pinus cembra.jpg:

    I would like the author of this pinecone-image taken on 15.08.2004 to tell where he picked it in Austria, please tell us the source if reading this. The origin was added by author at the source: Swiss Pine (Pinus cembra) cone and foliage, originally harvested south of Hochmölbing, Totes Gebirge, Austria.

    almost 4 years ago • edited: almost 4 years ago

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    Erwin Gruber commented on an older version of Polystichum dudleyi with P. californicum and P. munitum:

    This comment was deleted.

    almost 4 years ago • deleted: almost 4 years ago

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    Erwin Gruber commented on "Herbarium Specimen Image":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Herbarium Specimen Image":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Herbarium Specimen Image":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    One of many cultivated varieties of Polystichum setiferum, Soft Shield Fern.

    almost 4 years ago