F1 progeny of a pink-flowered Datura candida were cultivated. Although there was some flower colour variation in early stages, over a period of time all plants showed no morphological difference from the parent species which are clonal sterile. Alkaloid analysis showed no chemical variation and it was concluded that the pink-flowered Datura was a pure line strain. A new alkaloid was isolated and tentatively identified from GC and NMR data as 6,7-epoxylittorine. © 1992.