Polygala dunniana differs from P. saxicola and P. koi in having smaller, elliptic to obovate or spoon-shaped leaves (10-15 mm long, 5-8 mm wide) covered with white transparent short stiff hairs near the leaf margin. Its inflorescence is very short with few large flowers (18 mm long), white or pale green-white in color, with the keel petal having 4 finger-like appendages.
The inflorescence is terminal, racemose, with few flowers. Flowers are large, 18 mm long, on pedicels about 6 mm long, covered in short soft hairs. The calyx has 5 unequal sepals, one of which is hood-shaped and about 6 mm long, while the other two are elongated oval, approximately 4 mm long. The inner sepals are petaloid, elliptic-oblong, about 14 mm long and 6 mm wide, with 3-5 veins. Petals are 3, white or pale green-white, with lateral petals oblong, about 15 mm long, fused with the keel petal for about 2/3 of its length, and ending in 4 finger-like appendages.
Polygala dunniana
7-9月