catkin bearing nut trees, such as the walnut, have a refined structure that makes grafting difficult.
catkin killing was very severe in both orchards and only those varieties which had a few live catkins are listed.
I have a seedling about ten years old which didn't have one catkin bloom.
The Taylor every year sets a bunch of young nutlets, but I have never yet seen a catkin on it.
In the fourth group are those with less than 20 per cent of catkin injury.
Some of these interesting dwarfs have only one catkin—willow bushes reduced to their lowest terms.
Wood injury, catkin injury, and pistil injury will be treated separately.
Hardiness of catkin also varied greatly and rather consistently from year to year.
Pollen which gave a 91% germination on the standard medium showed only 50% germination on this catkin extract.
In winter the light could be seen on the other side; now catkin, bud, and opening leaf have thickened and check the view.
A long, thin, indeterminate inflorescence of tiny, petalless flowers growing on willows, birches, oaks, poplars, and certain other trees. The flowers on a catkin are either all male or all female. The female flowers are usually pollinated by the wind. Also called ament. See illustration at inflorescence.