Kind of seed: Castorbean.
General description.
Germination habit: Epigeal dicot.
Food reserves: Cotyledons, which are thin and leaf-like; endosperm (fleshy food-storage organs) usually persisting in the laboratory test.
Shoot system: The hypocotyl lengthens, carrying the cotyledons, endosperm, and epicotyl above the soil surface.
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.
Endosperm:
Missing.
[Reserved]
Epicotyl:
Missing.
Damaged or missing terminal bud.
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.