Bartlettina sp. is sometimes sold as Ageratum corymbosum, but it does not fit the botanical description of Ageratum corymbosum (flat-top whiteweed, desert ageratum). The tall, purple-leaved shade plant with large clusters of pinkish-purple flowers that is sold under this name is properly a Bartlettina. The true species is a tough, desert-adapted plant that is shorter, green-leaved and with misty blue flowers. See here for a true repesentation of A. corymbosum:
https://calphotos.berkeley.edu...
