Table 2.

Vulnerability curve parameters for five cultivars. Stem P₁₂, P₅₀, and P₈₈ are modeled from the vulnerability curves shown in Figure 2.

	Stem Px	Estimate	95% Confidence Interval
Acer	P 12	−1.37	−1.12	−1.61
	P 50	−2.52	−2.34	−2.69
	P 88	−3.77	−3.42	−4.24
Amelanchier	P 12	−1.70	−1.21	−2.21
	P 50	−4.53	−4.16	−4.97
	P 88	−8.66	−7.24	−11.38
Gleditsia	P 12
	P 50	−0.33	−0.26	−0.40
	P 88	−0.70	−0.57	−0.88
Gymnocladus	P 12
	P 50	−0.60	NA	NA
	P 88	−0.75	NA	NA
Malus	P 12	−1.67	−1.40	−1.95
	P 50	−3.56	−3.36	−3.76
	P 88	−5.85	−5.35	−6.51

N = 3 for each cultivar. For Gleditsia and Gymnocladus, the stem P₅₀ was higher than − 1 MPa and P₁₂ was not estimated from the collected data.