Phebe Westcott Humphreys (January 28, 1864 – June 17, 1939) was a journalist, horticulturist, photographer and children's book author, known for documenting and influencing landscape design with publications including The Practical Book of Garden Architecture (Philadelphia: J. B. Lippincott Co., 1914). Her work was favored by experts including the botanist Charles Howard Shinn, who lauded Humphreys' "amazing wealth of knowledge,"[1] and the tastemaker Ruby Ross Wood.[2] Humphreys contributed about 400 feature articles and regular columns to periodicals including House and Garden and Harper's Bazar. Among her topics are farms and factories run by immigrants;[3] architectural preservation work; environmental sustainability; philanthropies donating plants to the poor;[4] and newly patented household appliances.[5] Her pioneering guidebook for car travelers, The Automobile Tourist (Philadelphia: Ferris & Leach, 1905), was praised by The Philadelphia Inquirer for "most thorough information" provided by "an enthusiastic automobilist."[6] In 2020, the Cultural Landscape Foundation designated her a pioneer.[7]