The capsules of Rue, Spurge, and some others, are both loculicidal and septicidal, and so split into half-carpellary valves or pieces.
"The Elements of Botany" by Asa Gray
Calyx 5-cleft, free from the 2-celled ovary, which becomes a septicidal capsule.
"The Manual of the Botany of the Northern United States" by Asa Gray
The fruit is a capsule splitting along the septa (septicidal) (fig.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various