Table 3.

Urban aquatic plants quantitative data.

Life style	Plant name	Frequency/%	Coverage/%	Important value	Serial number
Submerged plants	Potamogeton crispus	58.3	5.22	0.93	1
	Ceratophyllum demersum	12.5	0.40	0.07	2
Floating-leaved plants	Spirogyra	58.3	4.23	0.43	1
	Lemna minor	41.7	3.79	0.38	2
	Nymphaea tetragona	12.5	1.85	0.19	3
Hygrophytes	Polygonum lapathifolium	79.2	4.97	0.22	1
	Alternanthera Philoxeroides (Mart.) Griseb	66.7	4.57	0.19	2
	Herba Ranunculi Japonici	37.5	2.58	0.09	3
	Ranunculus cuneifolius Maxim.	29.2	2.25	0.07	4
	Mimulus bodinieri Vant.	25.0	1.46	0.04	5
	Arundinella anomala Steud.	12.5	1.23	0.04	6
	Ranunculus natans	20.8	1.08	0.05	7
	Ranunculus sceleratus	12.5	0.86	0.04	8
	Marsilea L.	4.2	0.83	0.04	9
	Mazus japonicus	12.5	0.79	0.02	10
	Poaannua	4.2	0.75	0.02	11
	Capsella bursa-pastoris (Linn.) Medic.	8.3	0.49	0.02	12
	Veronica persica	8.3	0.38	0.01	13
	Cymbidium nanulum	4.2	0.23	0.01	14
	Trifolium repens	4.2	0.20	0.01	15
	Rorippa indica	4.2	0.04	0.00	16
Emerging plants	Iris tectorum Maxim.	50.0	4.90	0.48	1
	Phragmites australis	63.4	4.79	0.34	2
	Canna indica	29.2	3.18	0.13	3
	Typha orientalis	12.5	0.99	0.06	4
	Scirpus validus Vahl	8.3	0.37	0.03	5