Methods of in vitro propagation of plants of the genus Eriodictyon are described, including, in particular embodiments, plants of the species E. californicum, E. trichocalyx and E. sessilifolium. Methods of producing transgenic plants of the genus Eriodictyon are also described, along with methods of producing recombinant proteins in such plants. Compositions and methods for administering recombinant proteins produced in these plants are also described.