Fl. pale sulphur yellow; perianth segments broadly ovate, only slightly mucronate, spreading, overlapping half; the inner segments narrower, a little inflexed, with margins sometimes incurved or twisted; corona cylindrical, somewhat angled, with rim broadly flanged and deeply and regularly notched.
Brimstone, 1 Y-Y, Rev. G.H. Engleheart, England, 1923
Photo #43432 Albert F. Calvert, EnglandBrimstone, 1 Y-Y, Rev. G.H. Engleheart, England, 1923
Photo #31239 RHS Yearbook, England