Table 1.

The geographical information related to seed collections for the four Stipa species with average temperature and precipitation data from June to August during 1978–2007 (30 years).

Species	Collecting regions	Geolocation	Elevation (m)	Average temperature (°C)	Average precipitation (mm)
				June/July/August	June/July/August
S. baicalensis	Hulun Buir	49°13′N, 119°45′E	628–649	17.9/20.3/18.2	55/94/90
S. grandis	Xilinhot	43°57′N, 116°07′E	1265–1300	19.1/21.4/19.6	45/78/65
S. breviflora	Siziwang Banner	41°43′N, 111°52′E	1420–1500	17.9/20.4/18.0	41/77/81
S. bungeana	Ordos	39°50′N, 109°59′E	1350–1400	19.2/21.3/19.3	51/97/99