@book{bhlpg44404306, title = {Horsford's regal plants and bulbs : a selection of the best, truly-hardy varieties perennials rock plants hardy lilies evergreens - shrubs woodland ferns }, volume = {1937}, url = {https://www.biodiversitylibrary.org/page/44404306}, publisher = {F.H. Horsford}, author = {Henry G. Gilbert Nursery and Seed Trade Catalog Collection. }, year = {1937}, pages = {Page 20}, }