Atriplex gardneri

  • Genus

    Atriplex

  • Family
    Amaranthaceae
  • Synonyms

    Atriplex buxifolia

    Atriplex gordonii

    Atriplex nuttallii ssp. buxifolia

    Atriplex nuttallii ssp. gardneri

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  • Common names

    Gardner’s saltbush

Purity

  • ISTA PSD

    2

    See Details
  • AOSA PSU

    38

    See Details
  • Purity working weight (grams)

    18

    See Details
  • Other species (OSD)/Noxious working weight (grams)

    180

    See Details

PSU 38

Intact utricle with or without perianth, enclosed or not enclosed by fruiting bracts (bracteoles), whether or not a seed is present. Piece of broken utricle larger than one-half the original size, unless no seed is present. Seed with or without seed coat. Piece of broken seed, with or without seed coat, larger than one-half the original size.

Special consideration:

  • For Bassia prostrata, seed units that are retained on a 1mm opening square-hole sieve, when shaken for 30 seconds shall be considered pure seed units. Seed units that pass through the 1-mm sieve shall be classified as inert matter.
  • For Grayia spinosa, intact seed units provided a true seed with some degree of embryo development can be detected by slight pressure and by examination over light.

TWS Notes

PSD 2

Achene or cluster, with or without perianth or pedicel, unless it is obvious that no seed is present.

Piece of achene or cluster larger than one-half the original size, unless it is obvious that no seed is present.

Seed, with the pericarp/testa partially or entirely removed.

Piece of seed larger than one-half the original size, with the pericarp/testa partially or entirely removed.

Gomphrena: Achene with or without hairy perianth, unless it is obvious that no seed is present.

TWS Notes

Purity working weight (grams)

Noxious working weight/OSD

Germination and dormancy breaking method

Media

Agar 1%, Between blotter or paper

Moistened with

H2O

Prechill

No

Other dormancy breaking recommendations

Check for dormancy of firm ungerminated seeds at the termination of the test, using the basic criteria indicated in the Tetrazolium section below.

Germination Temperature

15°C

Hours light/dark

8/16

Days in warm germ

21

Tetrazolium (TZ) Methodology Recommendations:

  • Imbibition method and time

    Imbibe overnight between moist media or immersed in water

  • Option(s) to prepare and cut seed for staining

    Cross-section seed across embryo

  • Percentage (%) of TZ solution

    1.0

  • Time and temp of staining (hr)

    2-4 hours in oven between 30-35°C

  • List of important seed structures requiring staining:
    The embryo that stain completely red are viable. Green embryos are not considered viable. Empty utricles are not viable.