Field book of western wild flowers New York Putnam 1915 identification west us wildflowers Margaret Neilson Armstrong Margaret Neilson Armstrong Encelia californica California Encelia taxonomy: binomial = Encelia frutescens Helianthus annuus common sunflower women in science, The illustration features two distinct flowering plants, labeled with their common and scientific names. On the left, the California Encelia (Encelia californica) is depicted with its characteristic, elongated leaves and vibrant blossoms, while the Common Sunflower (Helianthus annuus) occupies the right side, showcasing its large, round central disk surrounded by vibrant petals. Both plants are accurately rendered, highlighting their unique structures and forms, accompanied by a simple background that emphasizes their botanical characteristics. The arrangement offers a clear representation of each species, capturing the essence of their natural beauty and ecological significance.