Figure 1.
The flower colour variations of different populations of E.acuminatum. A SCMP, mainly yellow B SCSL, mainly yellow, occasionally purple-yellow at the base of petals C CQNC, mainly yellow, occasionally rose-purple D SCSS, from yellow to purple E SCEM, mainly purple, occasionally purple-yellow F SCYJ, mainly purple, occasionally purple-yellow G Individual with yellow flowers H Individual with purple-yellow flowers I Individual with purple flowers.
A cool and rare little plant, named for the split leaf. This is the only wild patch of it I know about. I went hoping to catch it in flower but must've been too late.