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§ 201.56-8 - Flax family, Linaceae.

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Kind of seed: Flax.

General description.

Germination habit: Epigeal dicot. (Due to the mucilaginous nature of the seed coat, seedlings germinated on blotters may adhere to the blotter and appear to be negatively geotropic.)

Food reserves: Cotyledons which expand and become photosynthetic.

Shoot system: The hypocotyl elongates carrying the cotyledons above the soil surface. The epicotyl usually does not show any development within the test period.

Root system: A primary root, with secondary roots usually developing within the test period.

Abnormal seedling description.

Cotyledons:

Less than half of the original cotyledon tissue remaining attached.

Less than half of the original cotyledon tissue free of necrosis or decay.

Epicotyl:

Missing. (May be assumed to be present if cotyledons are intact.)

[Reserved]

Hypocotyl:

Deep open cracks extending into the conducting tissue.

Malformed, such as markedly shortened, curled, or thickened.

Root:

None.

Weak, stubby, or missing primary root with weak secondary or adventitious roots.

Seedling:

One or more essential structures impaired as a result of decay from primary infection.

Albino.

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§ 201.56-7 - Lily family, Liliaceae.
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§ 201.56-9 - Mallow family, Malvaceae.