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Map of the sites holding the search term ""Wolffia arrhiza""

There are 15 sites that mention "Wolffia arrhiza".

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…Floating species include frogbit Hydrocharis morsus-ranae and rootless duckweed Wolffia arrhiza with several notable emergent species including mare's tail Hippuris vulgaris, greater water parsnip Sium latifolium, lesser water plantain Baldellia ranunculoides and fine leaved wate…

Stodmarsh

…for example sharp leaved pondweed Potamogeton acutifolius and rootless duckweed Wolffia arrhiza. The grassland The large area of grassland to the east of the reedbeds is mainly cattle grazed pasture with intersecting dykes. The flora is similar to that described above, although …

Shapwick Heath

…Sium latifolium. Floating species include the nationally rare rootless duckweed Wolffia arrhiza and in the submerged layer are the nationally restricted species whorled water milfoil Myriophyllum verticillatum and fen pondweed Potamogeton coloratus. The site supports a diverse co…

Dungeness, Romney Marsh and Rye Bay

…ter parsnip and the vulnerable divided sedge Carex divisa and rootless duckweed Wolffia arrhiza. The vulnerable Warne’s thread moss Bryum warneum is a colonist of unshaded calcareous sand that must be persistently damp all year but not inundated by standing water. Warne’s thread …

Westhay Moor

…s. Floating species include frogbit Hydrocharis morsus range, rootless duckweed Wolffia arrhiza and great duckweed Lemna polyrhiza. Westhay Moor supports a nationally outstanding community of terrestrial and aquatic invertebrates. Thirteen Red Data Book species have been recorded…

West Moor

… trisulca, greater duckweed Spirodela polyrhiza and the local rootless duckweed Wolffia arrhiza. Field ditches, particularly between withy beds, may be hand cleaned resulting in outstandingly rich communities. Many ditches contain dominant stands of flowering rush Butomus umbella…

King's Sedgemoor

…port a diverse flora including frogbit Hydrocharis morsus-ranae, least duckweed Wolffia arrhiza, greater duckweed Spirodela polyrhiza, greater bladderwort Utricularia vulgaris, stoneworts Chara spp. and occasionally flowering rush Butomus umbellatus. Ditch banks are often herb ri…

Gwent Levels - Nash and Goldcliff

…cular botanical interest as it is the only area in Wales for the Least Duckweed Wolffia arrhiza. There is also an interesting community where two species of hornwort Ceratophyllum submersum and Ceratophyllum demersum grow together. The invertebrate interest is also high, as rare …

Biddle Street, Yatton

…erlying Compton soils. Also present are the nationally scarce rootless duckweed Wolffia arrhiza and hair like pondweed Potamogeton trichoides. Many of the field ditches also support a high diversity of emergent species. branched bur reed Sparganium erectum, lesser water parsnip B…

Puxton Moor

…nsa are all present. Also occurring are the nationally scarce rootless duckweed Wolffia arrhiza and the soft hornwort Ceratophyllum submersum, the latter dominating a number of ditches. Emergent species are also well represented and branched bur reed Sparganium erectum, tubular …

Tealham and Tadham Moors

…s Chars spp; floating species, frogbit Hydrocharis morsus-ranae, Least duckweed Wolffia arrhiza and emergent species, lesser water plantain Alisma lanceolatum, water dock Rumex hydrolapathum and bur reeds Sparganium spp. A diverse invertebrate fauna is associated in particular wi…

Gwlyptiroedd Casnewydd / Newport Wetlands

…s is one of the few places on the Levels where nationally scarce least duckweed Wolffia arrhiza, the world’s smallest flowering plant, is found at the north-western extent of its British range. Along the banks, fool’s watercress Apium nodiflorum, lesser water-parsnip Berula erect…

Rye Harbour

… west of the River Brede contain three notable plant species, rootless duckweed Wolffia arrhiza, soft hornwort Ceratophyllum submersum and hair like pondweed Potamogeton trichoides. Intertidal Habitats The saltmarsh fringing the River Rother is subject to varying degrees of tidal…

Wet Moor

…mbellatus and marsh stitchwort Stellaria palustris. The local rootless duckweed Wolffia arrhiza is common in the open ditches. The ditches and banksides support a diverse invertebrate community including the hairy dragonfly Brachytron pratense, the variable damselfly Coenagrion p…

Bridgwater Bay

…ches. Free floating species include the nationally restricted rootless duckweed Wolffia arrhiza, together with uncommon species such as frogbit Hydrocharis morsus-ranae and water fern Azolla filiculoides. Amongst the submerged water weeds, rigid hornwort Ceratophyllum demersum an…

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