"Mauve" and a Common Alder tree mauve stalked buds.
Mauve is a pale purple color named after the mallow flower (French: mauve) according to Wikipedia
And the Common Alder tree above and below has mauve, stalked buds according to Collins Tree Guide by Johnson & More.
And so they do. Isn't nature wonderful in the details? This tree in the Loder valley, Wakehurst Place today.