Field book of western wild flowers, New York, 1915, identification, west US, wildflowers, Margaret Neilson Armstrong, Margaret Neilson Armstrong, herb, women in science, This illustration features the plant known as Yerba Santa (Eriodictyon californicum), commonly referred to as Woolly Yerba Santa. The drawing highlights its distinctive tall stem, adorned with clusters of delicate, tubular flowers that exhibit a bell-like shape. The foliage consists of elongated, slightly serrated leaves, showcasing a rich texture. The plant is often recognized for its medicinal properties and is native to California, where it thrives in dry, mountainous areas. The caption notes its scientific classification, emphasizing its significance in both natural history and herbal medicine.