英语词汇castilloa elastica的起源、历史背景-英语词源词典

Castilloa elastica. This tree species—commonly called the ule or Mexican rubber tree—is not by any means the most impor- tant source of rubber today, but is a historical curiosity, having yielded the heavy black rubber balls Columbus was amazed to see natives playing with on his second voyage to South America—the first recorded observation of rubber by a Europe- an. The tree C. elastica is a species of the Castilloa genus of the mulberry family, and is named for Spanish botanist Juan Cas- tillo y Lopez. Like Columbus, later explorers were astounded by the resilient balls made from the tree’s vegetable gum, re- marking that they rebounded so much that they “seemed alive,” but rubber wasn’t brought into commercial use in Europe until three centuries after its discovery. The tree Hevea brasiliensis, yielding high-grade Para, is by far the most important rubber source today. Castilloa elastica, however, still yields a good quality Caucho rubber, the large tree being particularly valu- able when Para rubber is high priced. See rubber.

词汇	castilloa elastica
词源	Castilloa elastica. This tree species—commonly called the ule or Mexican rubber tree—is not by any means the most impor- tant source of rubber today, but is a historical curiosity, having yielded the heavy black rubber balls Columbus was amazed to see natives playing with on his second voyage to South America—the first recorded observation of rubber by a Europe- an. The tree C. elastica is a species of the Castilloa genus of the mulberry family, and is named for Spanish botanist Juan Cas- tillo y Lopez. Like Columbus, later explorers were astounded by the resilient balls made from the tree’s vegetable gum, re- marking that they rebounded so much that they “seemed alive,” but rubber wasn’t brought into commercial use in Europe until three centuries after its discovery. The tree Hevea brasiliensis, yielding high-grade Para, is by far the most important rubber source today. Castilloa elastica, however, still yields a good quality Caucho rubber, the large tree being particularly valu- able when Para rubber is high priced. See rubber.
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