Bunjin or literati style is a less common bonsai style. It mainly relies on the line of the tree for its focal point. The canopy and the pot should be minimal to keep the focus on the line of the tree. It is a style that has its admirers as well as many that do not like it. I have a short article at http://www.bonsaihunk.us/info/Bunjin_literati_Style.html
One thing that I find very useful is to photograph my trees on a regular basis. This allows me to see how the trees progress over time and lets me photographically change the images to see if a better design emerges from the image manipulations.
A series of pictures to illustrate how the design might change after playing with image manipulations.
With exposed root bonsai it is possible to create a taller tree. One can simply raise the tree up on its finer root system while keeping it supported with wire until the new roots harden sufficiently to make the trunk stable.
The new roots will need to be covered for some months until they harden off and become adapted to dry air. Once so adapted the alluminum foil can be removed.
When presented with material that is young and lacks interesting features I will search for ones that have twists and turns. Great bonsai can be created from this rather unexciting material. Using wire to shape long and limber pieces is another way to introduce interesting shapes. Another way is to use root cuttings that often have great shapes, The pictures below are all of Ficus ‘Mystery’, a fig that is not identified yet.
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There are many ways to handle a tree with little or no apparent taper. In this case a Ficus ‘Mystery’ was grown from a very straight and taperless cutting.
Fortunately there were several existing aerial roots that were brought down along the trunk and rooted into the ground. The aerial roots provide a visual thickening to the lower part of the trunk creating some taper that just does not exist. The roots coming off the aerials provide a nice surface flow that helps to visually stabilize the tree.
A fig commonly found in many garden centers used as a hanging basket plant is Ficus repens/pumila. Commonly called the Creeping fig. It is one of an assortment of figs that will climb up tree trunks, stone or brick walls and soon cover the surface with a very dense covering of leaves.
It is peculiar also in having two types of leaf. One is the very small heart shaped leaf that it grows as a small cutting and another much larger leaf that grows on sturdier branches that are often not supported on the wall to which most of the plant is clinging.
It an be used to shape small bonsai by allowing the green stems to get woody and to set shape and then to create a canopy from the branches. Getting a large trunk of this species is difficult and I have been looking for one for many years.
Make sure to keep this plant moist as it does not recover from drying out.
Ficus show lots of natural variations when grown from seed. Leaf shape, leaf size, bark color, vigor etc. can vary greatly from one seedling to the next. This can even occur with seed harvested from the same mother tree.
Here is one of many Ficus virens that I have grown from seed. This individual has a rounder leaf than the normal virens. Its other characteristics are pretty typical for Ficus virens but if one were to just use the leaf shape as a major factor in the identification it might just lead you astray. This is one of the most frustrating features of Ficus, their variability. While making our lives miserable by confusing our identification it is a useful trait for the species as it enables them to modify themselves and perhaps find an environmental niche to exploit.
Sometimes it is desirable to have a heavier branch and the material is grown in a container, indoors or is just a slow growing variety. In this case the material is Ficus microcarpa ‘Melon Seed’. This is a slow growing, miniature leaf form of microcarpa.
In order to develop it as a bonsai I have a good sized right branch but the left side needs a heavier branch. Fortunately, there are several small branches coming out of the left side that can be fused and form a proper sized branch. The apex of the tree is also too thin but there are no other branches that I can use right now to thicken it up.