Guy Edwardes / Close up of a sunflower (Helianthus annuus) head, Provence, France.
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Guy Edwardes / Close up of a sunflower (Helianthus annuus) head, Provence, France.
01497738
Ann & Steve Toon / Cornfield annual summer wildflowers growing on one of the plant charity Landlife's National Wildflower Farms, St Helens, Merseyside, UK, June.
00621108
Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France
00621099
Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France
00176769
Tim Fitzharris / Common Sunflower (Helianthus annuus) group showing symmetrical seed heads, North America
00340430
Yva Momatiuk & John Eastcott / Common Sunflower (Helianthus annuus) flowers and Large-leaved Lupine (Lupinus polyphyllus) in summer, Pryor Mountain, Montana
00113435
Jim Brandenburg / Common Sunflower (Helianthus annuus), South Dakota
01635479
Nigel Cattlin / Sunflower (Helianthus annuus) seedlings grown in light on left and without light on right, etiolated chlorotic and weak.
01635413
Nigel Cattlin / Sunflower (Helianthus annuus) seedlings in different stages of germination from seed to seedling with cotyledons, above and below ground. Sequence.
01635412
Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons expanding, above and below ground. Sequence 5/5.
01635411
Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons expanding, pericarp still attached to leaf. Above and below ground. Sequence 4/5.
