1657. Tomlinson, Renous Disp., 346. Bearing crasse spinous and echinated apples.
1756. P. Browne, Jamaica, 233. Half the capsula is echinated, the other smooth.
1881. Macdonald, in Jrnl. Linn. Soc., XV. No. 85. 281. Lobes of apertures finely echinated.