Goat's beard (Tragopogon sp.) seed-head dispersing seed. This dandelion-like plant is also known as salsify or Johnny-go-to-bed-at-noon plant. The flowers,which are either yellow or purple depending on the species,become a round seed- head (centre left) in midsummer. Each individual seed is attached to a parachute of fine hairs,known as a pappus (centre right),which is lifted from the seed-head and carried away by the wind. This type of seed dispersal is typical of the Asteraceae (formerly Compositae) family of plants to which the goat's beard belongs | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Harmer, Andy |
Taille de l’image : | 4064 px × 2704 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |