Mexican marigold flower. Light micrograph of a section through a Mexican marigold (Tagetes erecta) flower head. The bottom triangular tissue of the flower stem is a circular receptacle made up of parenchyma cells (light blue) with veins (dark-blue). The flower head is enclosed by an outer involucre of bracts. The top of the receptacle is covered by masses of small flowers (florets),with bracts around them,the capitulum. Each floret has a bract at the base and a flask-shaped ovary (blue),inside which is the ovule (purple). At the top of the ovary is the long tubular corolla (blue-purple),made up of five toothed petals. The ring of corollas (purple) have many stigmas in their centre. Magnification: x2,when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 3579 px × 5368 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |