Abstract: 73 Garlic varieties collected from the area in 22˚～45˚ N and 77˚～127˚ E could be classified into 3 ecotypes by experimental and numerical taxonomy, the difference in number of leaves between autumn and spring seedeing was the main character by which the classification was made. It reflects the sensitivity of scaly bud and inflorescence differentiation to low temperature. The 3 ecotype were Low Temperature Sensitivity Type (LTST), Low Temperature Middle Type (LTMT) and Low Temperature Inactivity Type (LTIT). The difference is larger in LTST collected from the area at latitude 31˚N and more southern. The plants grew rapidly in winter and were less tolerant to coldness. The difference was smaller in LTIT collected from the area at latitude 35˚N and more northern or at low latitude but high altitude. The plants grew slowly in winter and were endurable to coldness. LTMT collected from area of latitude 23˚～39˚ N behaved between LTST and LTIT in terms of the difference.