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)

Crassula helmsii 澳大利亞沼澤景天, 水生青龍鎖, 黑樂草

Common name: New Zealand Pigmyweed
Scientific name: Crassula helmsii 澳大利亞沼澤景天, 水生青龍鎖, 黑樂草
Genus: Crassula 青龍鎖屬, 肉葉草屬*
Family: Family: Crassulaceae 景天科, stonecrop or orpine family

Remarks*: 

Origin: Neophyte (established after 1500 AD). It is a native of Australia and New Zealand. It is first cultivated in 1927 and was discovered in the wild in 1956.

Date: 12th July

75

73

53

69

71

62

61

56

Lysimachia nummularia 草甸排草, 銅錢珍珠菜, 圓葉過路黃, 匍匐珍妮

Common name: Creeping-Jenny
Scientific name: Lysimachia nummularia 草甸排草, 銅錢珍珠菜, 圓葉過路黃, 匍匐珍妮
Genus: Lysimachia 珍珠菜屬
Family: Primulaceae 報春花科, primrose family

Remarks*: 

Origin: native

Date: 10th July

41

42

50

51

47

55

48

56

58

44

Sagittaria sagittifolia 茨菰, 慈姑, 葃菇, 燕尾草, 白地栗

Common name: Arrowhead
Scientific name: Sagittaria sagittifolia 茨菰, 慈姑, 葃菇, 燕尾草, 白地栗
Genus: Sagittaria 茨菰屬
Family: Alismataceae 澤瀉科, water-plantain family

Remarks*: S. trifolia, also called 茨菇 in Cantonese and could be found planted in Hong Kong,  is sometimes treated as a synonym of S. sagittifolia. However, S. sagittifolia is different from S. trifolia in having petals with a violet spot at the base and violet anthers. 

S. sagittifolia is fully temperate in its range, being found through most of Europe and into west Asia. S. trifolia is the species cultivated for its edible tubers. In Europe it is only found in far eastern Russia, but extends through much of temperate Asia into tropical southeast Asia.

Origin: native

Date: 11th July

169

129

119

121

125

Female flowers 126

143

Male flower 133

Flower bud 139

140

Fruiting 132