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Sagittaria_sagittifolia - L.

Common Name Arrow Head, Hawaii arrowhead
Family Alismataceae
USDA hardiness 6-9
Known Hazards None known
Habitats Ponds, canals and slow flowing water on muddy sub-strata in water up to 45cm deep, in acid or calcareous conditions[17].
Range Most of Europe, including Britain, temperate Asia and N. America.
Edibility Rating    (5 of 5)
Other Uses    (0 of 5)
Weed Potential Yes
Medicinal Rating    (1 of 5)
Care
Fully Hardy Wet Soil Water Plants Full sun
Sagittaria_sagittifolia Arrow Head, Hawaii arrowhead


Sagittaria_sagittifolia Arrow Head, Hawaii arrowhead
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Summary

Sagittaria sagittifolia (commonly "Arrowhead") is a flowering wetland perennial native to temperate Europe and Asia. It commonly grows in standing, or slow-moving water, 10-50 cm deep. Arrow-shaped leaves are produced at the terminal end of a petiole up to 45 cm long. Edible starchy tubers are found at the base of long, slender roots in the fall, as leaves die back. A similar plant, Sagittaria latifolia, is common to the west coast of North America, and can be used in the same manner.


Physical Characteristics

 icon of manicon of flower
Sagittaria_sagittifolia is a PERENNIAL growing to 1 m (3ft 3in) by 0.5 m (1ft 8in).
It is hardy to zone (UK) 7 and is not frost tender. It is in flower from July to August, and the seeds ripen from August to September. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers wet soil and can grow in water.

Synonyms

Sagittaria japonica.

Habitats

Edible Uses

Root - cooked[2, 4, 13, 56]. Excellent when roasted, the taste is somewhat like potatoes. The tubers are starchy with a distinct flavour[116]. The tubers should not be eaten raw[200].The skin is rather bitter and is best removed after the tubers have been cooked[183]. Tubers can also be dried and ground into a powder, this powder can be used as a gruel etc or be added to cereal flours and used in making bread[55, 94].The roots (tubers really) are borne on the ends of slender roots, often 30cm deep in the soil and some distance from the parent plant. The tubers of wild plants are about 15cm in diameter and are best harvested in the late summer as the leaves die down. The dried root contains (per 100g) 364 calories, 17g protein, 1g fat, 76.2g carbohydrate, 3.1g fibre, 5.8g ash, 44mg calcium, 561mg phosphorus, 8.8mg iron, 2,480mg potassium, 0.54mg thiamine, 0.14mg riboflavin, 4.76mg niacin and 17mg ascorbic acid. They contain no carotene[218]. Leaves and young stems - cooked[183]. Somewhat acrid.

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.



The plant is antiscorbutic, diuretic[4]. The leaf is used to treat a variety of skin problems[218]. The tuber is discutient, galactofuge and may induce premature birth[218].

Other Uses

None known

Cultivation details

A pond or bog garden plant, it requires a moist or wet loamy soil in a sunny position[1]. Prefers shallow, still or slowly flowing water up to 30 - 60cm deep[200]. Plants are fairly cold tolerant, surviving temperatures down to at least -10°c, though the top growth is damaged once temperatures fall below zero. They grow best in warm weather and require at least a six month growing season in order to produce a crop[206]. A polymorphic species, the sub-species S. sagittifolia leucopetala is extensively cultivated for its edible bulb in China where there are many named varieties[2, 56, 61].

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Propagation

Seed - best sown as soon as it is ripe in a pot standing in about 5cm of water. Prick out the seedlings into individual pots when they are large enough to handle, and gradually increase the depth of water as the plants grow until it is about 5cm above the top of the pot. Plant out in late spring or early summer of the following year. Division of the tubers in spring or autumn. Easy. Runners potted up at any time in the growing season.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

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Expert comment

Author

L.

Botanical References

17200

Links / References

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