A flower head from which some florets have been manually removed to reveal the pappus and brown pappus bristles.
The flower corollas wither and rot.
Notice that even after the flower corollas have largely disappeared pollens is still adherent to one blackened stigma.
Closeup of the pappus reveals a hole central hole through which the pappus brisles penetrate
The hairy tips of the phyllaries are still present on the outside of the pappus ring.
The attachment points are visible when some pericarps are removed. Notice the presence of very fine unpigmented bristles that surround the achene of pericarps. The phyllaries have now turned brown, although they retain the hairs.
Closeup of the pericarps
3 isolated pericarps in which the indentations with the achenes are visible
An isolated pericarp
An isolated pericarp showing the barbed nature of the brown pappus bristles
A half-millimetre rule shwos the size of the various components of a dissected pericarp
A dissected pericarp clearly showing who the attachment of the endocarp to the pappus bristles.
Th eendocarp layer covering the seed is now revealed
Parts of the dissected pericarp
Isolated pappus bristles
Note the endocarp surrounding the seed.
A dissected seed against the eye of a sewing needle. Notice the forging marks on the inner surface of the hole.
The three fertile pericarps on the left are longer and larger in diameter than the three on the left that do not contain developed seeds.