Usnea mutabilis
# Usnea mutabilis

Usnea mutabilis is a grayish-yellowish pale green, unequally branching, shrubby (fruticose) 3–7 cm long lichen commonly anchored on holdfasts on trees, mostly in eastern North America, sometimes in chaparral shrubs or pines in $California.^{:212}$ It is darker green than other members of the genus $Usnea.^{:212}$ The surface is covered with isolated, or clusters of, $isidia.^{:212}$ It lacks $apothecia.^{:212}$

The common name is bloody beard $lichen.^{:212}$ The thick axis and medulla are dull $red.^{:212}$

