Creates an instance of setiform-barbellate trichomes.
Are setiform-barbellate trichomes 'present', 'absent', or 'present or absent'?
If are absent, the length should be null.
absent
length
null
Density of setiform-barbellate trichomes.
Setiform-barbellate trichomes length in milimeters (mm).
It should be null when present is false.
present
false
Source.
Creates an instance of setiform-barbellate trichomes.