1 Golden Banner: Thermopsis montana 2 Silvery Lupine: Lupinus argenteus 3 Prairie Clover: Petalostemon purpureus 4 Wild Sweet Pea: Lathyrus ornatus 5 Purple Vetch: Vicia americana] Wild Sweet Pea Lathyrus ornatus Plate 27, fig. 4 The flowers of the Wild Sweet Pea are purple and white and blossom in the spring and early summer. The stems are low, 4-12 in., and occur on plains and prairies at 4000-8000 ft. Purple Vetch Vicia americana Plate 27, fig. 5 The Purple Vetch bears blue to purple flowers in loose clusters on climbing or scrambling stems 1-1/2-3-1/2 ft. long. They bloom in spring and early summer and may be found on prairies and in rich river valleys at 4000-10000 ft. Loco Aragalus Lamberti Plate 28, fig. 1 The flowers of the Loco are deep red-purple or white, often turning blue with age. They occur in open spikes on stems 4-12 in. tall and bloom in spring and summer. The plants occur on plains, prairies, hills and table-lands at 4000-9000 ft. The Loco is very poisonous to stock. After acquiring a taste for the plant they will eat nothing else and die from the effects in a few months or one or two years. In this way, millions of dollars of stock are lost annually. A cure for the disease has been found recently. Alfalfa Medicago sativa Plate 28, fig. 2 The small blue to purple blossoms of Alfalfa grow in loose, small heads on branching plants that attain a height of 1-2 ft. They bloom all summer long. The plant has escaped from cultivation and grows thriftily at 5000-6000 ft. Alfalfa forms a most nourishing fodder for horses and cattle and has been cultivated for ages in Southern Europe. When sown in deep, rich soils, few plants yield so heavy a crop. During the World War, meal was made from the dried and ground plants and used as a substitute for flour. [Illustration: Plate 28 PEA FAMILY 1 Loco: Aragalus Lamberti 2 Alfalfa: Medicago sativa 3 Alpine Clover: Trifolium dasyphyllum 4 Psoralea: Psoralea tenuiflora 5 Dwarf Clover: Trifolium nanum 6 Prairie Pea: Astragalus hypoglottis 7 Rose Locust: Robinia neo-mexicana] Alpine Clover Trifolium dasyphyllum Plate 28, fig. 3