Table 1.

CO₂ compensation points (Γ and Γ*) and carbon isotope ratios (δ¹³C) for Portulaca species and Sesuvium portulacastrum

Species	Γ (μbar)	Γ*(μbar)	δ13C (‰)
Portulaca amilis	ND	ND	–13.4±0.03
P. cf. bicolor	ND	ND	–15.4±0.001
P. cryptopetala	24.8±1.2	19.4±1.4	–30.5±0.21
P. grandiflora	ND	ND	–12.0±0.57
P. molokiniensis	ND	ND	–15.3±0.37
P. oleracea	3.8 ±0.6	2.0 ±0.4	–13.9±0.83
P. pilosa	ND	ND	–14.0±0.25
P. umbraticola	ND	ND	–13.4±0.29
Sesuvium portulacastrum	42.9 ±0.9	37.2 ±1.4	−29.5±0.07

Means are from 2–4 individual measurements ±SE.

ND, not determined.