ARROW-HEAD

Sagittaria Sagittifolia

Water-Plantain Family [Alismatacaea]

month8Jul month8Aug

flower
flower8white
inner
inner8purple
petals
petalsZ3
stem
stem8angular

2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
Very distinctive aerial leaves have three long prongs shaped line an arrow-head and several lighter-green veins running lengthways The stalks for these leaves are triangular in cross section in places. It has two other kinds of leaves - the floating leaves are oval with a deep notch ate one end (lower right). [There are also submerged leaves which are linear and translucent].


23rd July 2006, Leeds and Liverpool Canal, Plank Lane.. Photo: © RWD
Grows with roots in water at up to a foot or two deep. The arrow-shaped leaves and flower spike are held above water-level.


2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
The spike of the flowering stem looks square at the top, other parts of the stem may have a triangular cross-section, or may have a few flats, hence the 'angular' description. The flowers are in triplets on short stalks up the flowering stalk.


2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
The almost spherical green fruits, later turning brown, are also in triplets and covered in short stubby spikes.


2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
The globular fruits have short stubby spikes.


2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
The arrow-shaped leaves are perched atop a stalk at the nodal point, from where several prominent light-green coloured veins radiate, reaching to the three extremities of the leaf.


2nd Aug 2005, Leeds and Liverpool Canal, Appley Bridge. Photo: © RWD
The three white petals have a purple splurge of colour near the centre, where lies a spiky spherical globe of stamens? The petals may have translucent spots.


4th Aug 2009, Rufford Branch, Leeds & L/pool Canal. Photo: © RWD
The central part of the flower starts off with purple spikes. The pollen seems to en-circle the lower parts.


7th Aug 2005, Leeds and Liverpool Canal, Plank Lane. Photo: © RWD
Some flowers seem to have but a single-all-encircling petal. The now-square flowering stem eminently visible. Stalks with flowers are round.


Some similarities to Broad Leaved Arrow-head.

No relation to : The Arrow-grasses [plants of a similar name]

Has triangular stems.

Arrow-head has the ability to absorb large amounts of the poisonous heavy metallic element, cadmium, but without detrimental effects to itself. Cadmium is toxic to both plant and animal kingdoms.

ANY TEXT GOES HERE


Distribution
family8water-plantain family8alismataceae
BSBI maps
genus8sagittaria
SAGITTARIA

ARROW-HEAD

Sagittaria Sagittifolia

Water-Plantain Family [Alismatacaea]