2, the petals are different. Sheep's foot armor flowers, not spiral, is three fertile stamens, petals are more narrow than the zinnia, the edge of the ruffled, waves are not so obvious; sheep's foot armor pods are also narrower than the zinnia, the whole flower looks long and thin. Bauhinia flowers but slightly spiral, fertile stamens 5, petals are broader, with a short stalk; pods flattened, narrowly elliptic, along the ventral suture line at the narrow wing.

3, the results are different. Sheepshead's racemes are extremely short shrunken, and can bear fruit after flowering; Zinnia racemes are spreading, sometimes compounded into panicles, and usually do not bear fruit.

4, different flowering period. Sheepsfoot nail 11, December fall and winter open; Bauhinia annual November to March flowering, which is the most obvious difference in the flowering period.