Hardy shrubs may be layered in the fall, either early or late, and if an incision is made, a callus will have formed by spring.
The callus is long, acute, bearded with reddish-brown hairs.
When the callus growth is once formed, the fungus of the original canker encroaches on it very slowly, or often not at all.
The callus of the third glume is short, pointed and villous.
The living cells bordering the wound form cork, and then those deeper down grow out and form a callus.
The formation of callus in fractured limbs was also increased.
The callus which forms is largely fibrous, and if the animal is put to work too quickly this callus is liable to rupture.
This callus may form upon any cut surface, or even where the bark has been abraded.
After the fracture has completely healed the "callus" gradually disappears.
Too much moisture will stimulate the emission of roots and starting of buds without aiding the callus formation.
"hardened skin," 1560s, from Latin callus, variant of callum "hard skin," related to callere "be hard," from PIE root *kal- "hard" (cf. Sanskrit kalika "bud," Old Irish calath "hard," Old Church Slavonic kaliti "to cool, harden").
callus cal·lus (kāl'əs)
n. pl. cal·lus·es
The hard bony tissue that develops around the ends of a fractured bone during healing.