Zinnia disc floret. Coloured scanning electron micrograph (SEM) of a Zinnia sp. flower head disc floret. This floret (true flower) is found in the central (disc) region of the flower head. It is a self-contained reproductive structure,surrounded by leaf-like bracts (green). The anthers (yellow) are the male reproductive parts that produce the pollen. They are fused to form a cylinder around the pistil (brown,female reproductive structure). This will be raised to receive the pollen that will fertilise the plant. Magnification: x20 at 6x7cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 2990 px × 3665 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |