Potamogeton pectinatus 篦齒眼子菜, 龍鬚草, 水豆兒, 救荒本草

Common name: Fennel Pondweed
Scientific name: Potamogeton pectinatus 篦齒眼子菜, 龍鬚草, 水豆兒, 救荒本草
Genus: Potamogeton 眼子菜屬
Family: Potamogetonaceae 眼子菜科, pondweeds family

Remarks*: It may be other Potamogeton spp since it is difficult to identifty it.

Origin: native

Date: 11th &13th July

131 (13th July)

124  (13th July)

163

164

019  (13th July) Sharp leaf tip.

009  (13th July)

010  (13th July)

015  (13th July) Leaf sheath and ligule

016  (13th July)

017  (13th July)

171

172 Flower bud

176

162 Flowers (not emerging from water surface)

120  (13th July)

126  (13th July)

118 black?  (13th July)

002  (13th July) Fruits

025  (13th July)

021  (13th July) Asymmetric fruits 

023 (13th July)

Potamogeton epihydrus

Common name: American Pondweed
Scientific name: Potamogeton epihydrus*
Genus: Potamogeton 眼子菜屬
Family: Potamogetonaceae 眼子菜科, pondweeds family

Origin: native

Remarks*: It is very rare in UK an is listed as VU (vulnerable) 易危 according to IUCN Red List Categories.  

Date: 12th Sept

floating elliptic leaves and submerged linear leaves

underside of the leaf

inflorescence above the water surface

flowering stalk is above the water surface; fruits are under the water surface 

fruits

Potamogeton natans 浮葉眼子菜

Common name: Broad-leaved Pondweed
Scientific name: Potamogeton natans 浮葉眼子菜
Genus: Potamogeton 眼子菜屬
Family: Potamogetonaceae 眼子菜科, pondweeds family

Origin: native

Date: 18th July

floating leaves

flowering stalk

1 week later, all other inflorescence disappeared except this one (photo above) (26th July)