If you buy an established, "pedigreed" variety, as long as the leaves are rather broad, the veins clear, and the roots sturdy, nine times out of ten you won't have gone wrong.
如果買的是繁衍數代，已經「驗明正身」的固定品種，只要它的葉部較寬大、蘭線正確、根部多且粗，通常八九不離十，不會有上當之慮。