| + | Flowers small, solitary, in terminal gaudy-bracted spikes; corolla tubular, sometimes flattened laterally, 2-lipped; lower lip smaller, more or less 3-toothed; stamens 4: lvs. alternate, entire or cut—Upwards of 3O species in U. S. and Mex., and 1 in N. Asia. Castillejas are little known in gardens. They are more or less root-parasitic. |