Kinds of seed by family:
Carrot family, Apiaceae (Umbelliferae) - carrot, celery, celeriac, dill, parsley, parsnip;
Hemp family, Cannabaceae - hemp;
Dichondra family, Dichondraceae - dichondra;
Geranium family, Geraniaceae - alfilaria;
Mint family, Lamiaceae (Labiatae) - sage, summer savory; benne family, Pedaliaceae - sesame;
Rose family, Rosaceae - little burnet;
Nightshade family, Solanaceae - eggplant, tomato, husk tomato, pepper, tobacco; and
Valerian family, Valerianaceae - cornsalad.
(a) General description.
(1) Germination habit: Epigeal dicot.
(2) Food reserves: Cotyledons; endosperm may or may not be present, depending on the kind.
(3) Shoot system: The hypocotyl elongates, carrying the cotyledons above the soil surface. The epicotyl usually does not show any development within the test period.
(4) Root system: A primary root; secondary roots may or may not develop within the test period, depending on the kind.
(b) Abnormal seedling description.
(1) Cotyledons:
(i) Less than half of the original cotyledon tissue remaining attached.
(ii) Less than half of the original cotyledon tissue free of necrosis or decay.
(2) Epicotyl:
(i) Missing. (May be assumed to be present if the cotyledons are intact.)
(ii) [Reserved]
(3) Hypocotyl:
(i) Malformed, such as markedly shortened, curled, or thickened.
(ii) Deep open cracks extending into the conducting tissue.
(iii) Watery.
(4) Root:
(i) None.
(ii) Missing or stubby primary root with weak secondary or adventitious roots.
(5) Seedling:
(i) One or more essential structures impaired as a result of decay from primary infection.
(ii) Albino.
[59 FR 64506, Dec. 14, 1994]