Taraxacum species for confirmation 290412MK01:
Please help to identify this herb. Is this Taraxacum officinale?
the peduncle is longer (2.5 feet) here. The head inflorescence measures c. 5cm across.
Altitude: 2100 m ASL
This one appears Sonchus arvensis to me.
Hope it will help you to compare, specially the fourth image of the leaves.
This seems to be a good candidate for being S. brachyotus, peduncle is glabrous, few hairs (not glandular) on phyllaries.