boxplot in combination with point value

Hello, I have a group of data as below:

X1 0.3  1.3
X1 0.37  1.06
X1 0.24  1.08
X1 0.35  1.09

X2 0.37  1.08
X2 0.4  1.32

X3 0.36  1.34
X3 0.38  1.55

X4 0.78  1.35

I want to plot a boxplot for the group X1, X2 and X3, and since group X4 comprises only a single value, I want to show it as a single point on the same X-axes of the same figure. Also, I want to put label on X-axes for each group. Any help?