Table 2.

Summary of General Linear Models for bluebunch wheatgrass stomatal density (n = 314) and leaf area (n = 304) with site as the blocking variable and water and temperature as the treatment factors

		Stomatal density		Leaf area
Source	d.f.	F-ratio	P	F-ratio	P
Block (site)	2	22·173	<0·001	5·859	0·003
Water	2	6·048	0·003	4·039	0·019
Temperature	1	0·469	0·494	2·279	0·132
Water × temperature	2	1·096	0·336	0·097	0·907
Error for stomatal density	306
Error for leaf area	296

Values in bold are significant at P < 0·10.