Table 1. The occurrence of C₄ species in plant families and genera in China.

Family	Genera	Species number	% of total C4
Dicotyledoneae
Aizoaceae	3	3	0.80
Amaranthaceae	3	18	4.85
Chenopodiaceae	17	65	17.52
Crassulaceae	1	1	0.27
Euphorbiaceae	1	2	0.54
Nyetaginaceae	1	2	0.54
Polygonaceae	1	5	1.35
Portulaceae	1	2	0.54
Zygophyllaceae	1	1	0.27
Monocotyledoneae
Cyperaceae	12	73	19.67
Gramineae	72	199	53.64
Total	113	371	99.99