Mexico. Hidalgo: Hwy 85 from Zimapán to Tamazunchale at Las Trancas, about 6 km E along track towards Nicolás Flores, 2420 m, 6 Sep 1983, T. R. Tarn, R. W. Ross, & J. Gómez 62 (holotype: K, cultivated from seeds collected in Mexico in 1983 and grown and harvested in a field at Sturgeon Bay, Wisconsin in 1988; the holotype and isotype are clearly labeled as such by the author!; isotypes: BM!, C!, K!). Note: Spooner et al. (2004) saw 15 more isotypes at K that are being distributed by K to herbaria worldwide.