北美多年生草本植物；叶可入药；有时归入山扁豆属。
North American perennial herb; leaves are used medicinally; sometimes placed in genus Cassia.
另一种是山扁豆属的肉桂，生长于越南，中国，印度尼西亚和中美洲。
The other is from the cassia tree, which grows in Vietnam, China, Indonesia and Central America.
另一种是山扁豆属的肉桂，生长于越南，中国，印度尼西亚和中美洲。
The other is from the cassia tree, which grows in Vietnam, China, Indonesia and Central America.
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