FLOWERING RESPONSES AND PHYLOGENY IN THE PHACELIA FRANKLINII GROUP (HYDROPHYLLACEAE)

Gillett , George W. (U. Hawaii, Honolulu.) Flowering responses and phylogeny in the Phacelia franklinii group (Hydrophyllaceae). Amer. Jour. Bot. 50(8): 798–801. Illus. 1963.—Phacelia franklinii is long-day positive, with or without gibberellin, but P. sericea, P. idahoensis, P. mollis, and P. lyallii did not flower under these conditions. The latter 4 species flowered after short-day, low-temperature induction treatments. An interpretation of phylogenetic relationships, based on flowering responses, genetic compatibility, and morphological and anatomical information, is presented.