Erwin Gruber

Enthusiast for living creatures

My activity

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Cyttaria darwinii:

    Leaves and twigs of host to be seen at source.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Cyttaria darwinii on tall deciduous beech:

    Leaves and twigs to be seen at source.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    Just one of many cultivars, Polystichum setiferum cv. "Aarestrup", deviating from usual wild individuals.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum":

    Just one of many cultivars, Polystichum setiferum cv. "Aarestrup", deviating from usual wild individuals.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum var. pleuridensum":

    Just a cultivar of Polystichum setiferum, no published taxonomic variety, might be termed P. setiferum cv. "Pleuridensum" for the case the cultivars name is right.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum var. pleuridensum":

    Just a cultivar of Polystichum setiferum, no published taxonomic variety, might be termed P. setiferum cv. "Pleuridensum" for the case the cultivars name is right.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Polystichum setiferum var. pleuridensum":

    Just a cultivar of Polystichum setiferum, no published taxonomic variety, might be termed P. setiferum cv. "Pleuridensum" for the case the cultivars name is right.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.02:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.05:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.10:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.07:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.04:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago • edited: about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Titaeospora equiseti on Equisetum hyemale no.08:

    This is very probably the asexual propagating stage = anamorph of Stamnaria americana, rather unlikely of S. laetissima (Cesati) ined.!, but not of another S. sp. !

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Stamnaria:

    Got no example of "Dict. of the Fungi" at hand, as remembering the authors do refer the 2 true S. persoonii + americana to the genus, plus another which in fact is not congeneric, do not remember at moment, but do guess either "S. thujae or hyalopus", found not on Equisetum. Since several true Stamnaria spp. detected and described by me in master-thesis are not published yet, the genus does comprise some more 3 spp.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Equisetum hyemale ssp. affine (Equisetaceae) - whole plant - unspecified":

    This looks much like Equisetum laevigatum

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "Image of Equisetum laevigatum":

    This is typical for Equisetum hyemale

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on "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).

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    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.

    about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

    Erwin Gruber commented on an older version of Comprehensive Description:

    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).

    about 1 year ago • edited: about 1 year ago

  • Profile picture of Erwin Gruber who took this action.

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

    image quality too low for secure identification

    about 1 year ago