Macrophotograph of a seed pod of the field penny cress,Thlaspi arvense showing the developing seeds along the central margin. A characteristic of penny cress,used in species identification,is the persistent short style situated in a deep notch at the bottom of the pod. The style is a part of the female reproductive apparatus of the plant. It connects the stigma (pollen receiving body) to the ovaries (home of the eggs),which lie deeper within the flower. It is also the path down which the pollen tube bearing the male gametes must travel to meet & fertilise the eggs. Field penny cress is a common weed found growing on waste ground & field headlands | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3836 px × 4795 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |