Table 1. Population codes, geographical origins and sample sizes of the 21 studied populations of O. rufipogon.

Population codes	Geographical origins	Latitude (°N)	Longitude (°E)	Sample sizes	Population sizes†	Habitat types	Ecological designation
DY	Guigang, Guangxi	23.18	109.73	27	6,000	Ponds	Central
LX	Wuxuan, Guangxi	23.53	109.54	25	5,000	Streams	Central
GT	Bingyang, Guangxi	22.98	108.99	27	2,000	Ponds, ditches	Central
NB	Beise, Guangxi	24.10	105.82	24	1,500	Ponds, ditches	Central
ZX	Nanning, Guangxi	22.77	108.09	24	550	Ponds, ditches	Central
LA	Longan, Guangxi	23.04	107.87	25	1,000	Ponds, ditches	Central
TK	Tiandong, Guangxi	23.59	107.12	18	1,500	Ponds, ditches	Central
KE	Tiandong, Guangxi	23.55	107.16	25	3,000	Ponds, ditches	Central
QS	Qiongshan, Hainan	19.97	110.39	28	2,500	Ponds, ditches, streams	Central
SY	Sanya, Hainan	18.36	109.17	24	300	Ponds	Central
LD	Ledong, Hainan	18.47	108.85	28	3,000	Ponds, ditches, streams	Central
SX	Suixi, Guangdong	21.38	110.25	30	2,000	Ponds, streams	Central
EP	Enpin, Guangdong	22.27	112.22	29	10,000	Ponds, streams	Central
ZC	Zengcheng, Guangdong	23.41	113.77	28	5,000	Marshes, rivers	Central
BL	Boluo, Guangdong	23.45	114.44	26	2,000	Streams	Central
GZ	Gaozhou, Guangdong	21.86	110.70	27	10,000	Ponds, ditches, marshes	Central
RP	Raoping, Guangdong	23.66	116.98	31	500	Ponds	Peripheral
YD	Yingde, Guangdong	24.25	113.13	30	150	Lotus ponds	Peripheral
DX	Dongxiang, Jiangxi	28.34	116.71	29	120	Ponds	Peripheral
ZP	Zhangpu, Fujian	24.18	117.83	25	150	Ponds, ditches	Peripheral
CL	Chaning, Hunan	26.72	113.49	25	180	Pond	Peripheral

^† Population size is the estimation of number of flowering plants per population.