Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

Nigel Cattlin / Broad bean (Vicia faba) young plant with early leaves and roots, uprooted and germinated seed split to show food reserve.

Nigel Cattlin / Broad bean (Vicia faba), close up of roots and cross section of germinated seed to show food reserve.

Nigel Cattlin / Cleavers (Galium aparine) seedling with cotyledons and early leaf rosettes, growing as garden weed.

Nigel Cattlin / Sunflower (Helianthus annuus) seedlings in different stages of germination from seed to seedling with cotyledons, above and below ground. Sequence.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons expanding, above and below ground. Sequence 5/5.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons expanding, pericarp still attached to leaf. Above and below ground. Sequence 4/5.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with expanding cotyledons. Sequence 3/3.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with expanding cotyledons, pericarp retained on leaf. Sequence 2/3.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons still trapped inside pericarp after germination. Sequence 1/3.