Plate 40, fig. 2 This native Arnica is a close relative of _Arnica montana_, which furnishes the well-known tincture that is applied to bruises and sprains. It has been employed as a stimulant in low fevers, but does not appear to have any value when used internally. The Mountain Arnica occurs in fir, spruce and aspen forests at 7000-12000 ft. The heads are yellow-centered and yellow-rayed, and bloom all summer on plants 1-2 ft. high. Gaillardia Gaillardia aristata Plate 40, fig. 3 Gaillardia bears very large heads with reddish-brown centers and many yellow or orange rays. They bloom all summer. The plants grow 1-3 ft. tall and may be found on prairies, and in meadows and aspen woodlands at 7000-10000 ft. The Gaillardias are frequently cultivated in gardens. Butterweed Senecio Fendleri Plate 40, fig. 4 The yellow heads of the Butterweed are quite small but are grouped in large clusters on stems 6 in.-2 ft. tall. They bloom in midsummer and are found on foothills and gravel-slides at 7000-10000 ft. Goldweed Ximenesia encelioides Plate 40, fig. 5 The heads of the Goldweed have yellow centers and yellow, toothed rays, and they bloom all summer. The plants are 2-5 ft. tall, growing along roadsides and in fallow fields at 3000-7000 ft. Actinella Actinella Richardsonii Plate 40, fig. 6 The yellow heads of Actinella are small and grouped in open clusters on stems 6 in.-2 ft. tall. They bloom in early and midsummer and are found on plains and foothills at 5000-8000 ft. This species of Actinella is sometimes called the “Colorado Rubber Plant,” but it does not produce rubber in sufficient quantities to be commercially valuable. Dwarf Sunflower Helianthella Parryi Plate 40, fig. 7 The heads of the Dwarf Sunflower are entirely yellow. They are borne on slender stems 1-3 ft. tall and bloom in midsummer. They may be found in spruce and aspen forests at 7000-10000 ft. Bahia Bahia dissecta Plate 41, fig. 1 The heads of Bahia have large yellow centers and very short yellow rays. They grow on branching stems 1-4 ft. high and bloom in midsummer. The plants may be found on foothills and gravel-slides at 5000-9000 ft. Actinella Actinella acaulis Plate 41, fig. 2 Actinella, like Bahia, has large yellow centers and short yellow rays. The plants are unbranched and grow 6-18 in. tall. They bear flowers in early summer and occur on prairies, plains and foothills at 3000-8000 ft. Sneezeweed Helenium Hoopesii Plate 41, fig. 3