I adore shitakusa / kuasomono. The right choice of flora in the right pot can magic! Other than looking at photos though, I know nothing! Anyone grow companion plants? What techniques & species work for YOU?
My mother has 5-6 different types of small (2" & under) Wildflowers - blues, purples, whites & yellow. I think their size will be suitable for this kind of application. I love the deep color of clematis occidentalis aka mountain clematis/ virginia bower. theyre so delicate looking!! I've found the site uswildflowers.com very helpful. Great descriptions of flowers, their petals, leaves & tendencies. Also you can search by flower color making identification easy.
I don't really have any trees worth complimenting currently but, I enjoy thinking of display ideas!!