最後のクマシデの添え草ですが、秋を感じるような草物で、草丈が低くて数年以上小鉢で持ち込んだものがよいです。
鉢は丸鉢でできるだけ浅い鉢に植えてあるものが良いです。
そして主木の大きさとバランスのとれたもので、主木の力が10に対して1〜2ぐらいの大きさのものを用い、主木と拮抗しないようにします。地板は薄いもので丸か楕円のものを使用し、正方形や長方形などの角ものは避けましょう。
主木には平卓が良く合います。(高さが10cm〜15cmまでぐらいの卓)
This is what a Sensei wrote and will translate to the best of my ability.
You should go with something that has the feel of a fall plant, and the height should be short and less than the height of a rice plant's height. It should be allowed to grow for several years in a small pot. It would be good to put it in a round pot that is shallow. You should aim to have balance between the main tree and the accent. For example, a ratio of size would be 10 for the main tree and 1-2 for the accent plant would express well. Don't allow the accent planting to compete or antagonize the main tree. It would be good to use a Jiita that is narrowly cut in a round or elliptical shape, and avoid ones that are square or rectangular. The main tree would look good on a Heitaku that is about 10-15 cm in height.
Didn't exactly give you a name for a plant, but Susuki? I will also try to see some in his book for the fall months.