Also present are such leguminous plants as lentil and vetch. Spelt, wheat, barley, peas and vetch were cultivated. Some, like alfalfa, clover, vetch, and "Arachis", are sown in pasture and grazed by livestock. Lathyrus linifolius is a species of pea, commonly called bitter vetch or heath pea. The Minoans raised cattle, sheep, pigs and goats, and grew wheat, barley, vetch and chickpeas. It includes a subspecies known as mat vetch. One study in Colorado found that favored foods included vetch and evening primrose. A few plant species were introduced by the Norsemen, such as cow vetch. The flowers are Chinese milk vetch, which are the prefectural flower. Another method of producing selenium is to farm selenium-gathering plants such as milk vetch. The caterpillar has green and yellow stripes to provide camouflage while it feeds on vetch. Rambam says that onycha was rubbed with bitter vetch to remove impurities. However, definite evidence for later vetch cultivation is available only for Roman times. Bitter vetch ( "orobos") was considered a famine food. The average attendance for that last season at the Vetch was 8,457.