Table 3.

ANOVA results for leaf predawn (Ψ_pd) and midday (Ψ_md) water potential for the same plants that were used to generate vulnerability curves in the common garden 2003 (see Fig. 2)

H. anomalus	Ψpd			Ψmd_
	df	F	P	df	F	P
Habitat	1	0.17	0.69	1	0.72	0.42
Treatment	1	23.28	<0.005	1	35.31	<0.001
Habitat×Treatment	1	0.01	0.94	1	0.2	0.67
Block (Habitat×Treatment)	4	6.9	<0.05	4	8.23	<0.01
Error	8			8
H. deserticola	Ψpd			Ψmd_
	df	F	P	df	F	P
Habitat	1	18.08	<0.005	1	11.4	<.01
Treatment	1	0.53	0.49	1	0.40	0.55
Habitat×Treatment	1	0.1	0.76	1	1.72	0.23
Block (Habitat×Treatment)	4	0.34	0.84	4	1.30	0.36
Error	7			7

H. deserticola individuals were sampled in July and H. anomalus in August, habitat (on-dune versus off-dune) and treatments (+H₂O and NO H₂O)