Linum lewisii Linum lewisii Linum lewisii ("Linum perenne" var. "lewisii") (Lewis flax, blue flax or prairie flax) is a perennial plant in the family Linaceae, native to western North America from Alaska south to Baja California, and from the Pacific Coast east to the Mississippi River (USDA Plant Profile: "Linum lewisii"). It grows on ridges and dry slopes, from sea level in the north up to in the Sierra Nevada. It is a slender herbaceous plant growing to 80 cm tall, with spirally arranged narrow lanceolate leaves 1–2 cm long. The flowers are pale blue or lavender to white, often veined in
The Colours of Animals Protection. Chapter 7 Variable Protective Resemblance in Vertebrata, Etc. Chapter 8 Variable Protective Resemblance In Insects. Chapter 9 Protective Resemblances in Lepidoptera (continued). Chapter 10 Warning Colours. Chapter 11 Warning Colours (continued). Chapter 12 Protective Mimicry. Chapter 13 Protective and Aggressive Mimicry. Chapter 14 The Combination of Many Methods of Defence. Chapter 15 Colours Produced by Courtship. Chapter 16 Other Theories of Sexual Colouring. Chapter 17 Summary And Classification. The co-discoverer of natural selection Alfred Russel Wallace, reviewing Poulton in "Nature", was interested by Poulton's observations on thin films producing iridescence: "In some cases dried insects lose some of their