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Caltha leptosepala - DC.
                 
Common Name Western Marsh Marigold, Howell's marsh marigold, Sulphur marsh marigold
Family Ranunculaceae
USDA hardiness 3-7
Known Hazards The whole plant, but especially the older portions, contains the toxic glycoside protoanemanin - this is destroyed by heat[172]. The sap can irritate sensitive skin[172].
Habitats Open, wet, subalpine and alpine marshes, wet seepages and marshy meadows at elevations of 750 - 3900 metres[60, 85, 270].
Range Western N. America - Alaska to Oregon.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Wet Soil Water Plants Semi-shade Full sun

Summary

Caltha leptosepala Western Marsh Marigold, Howell


http://commons.wikimedia.org/wiki/User:Wsiegmund
Caltha leptosepala Western Marsh Marigold, Howell
http://commons.wikimedia.org/wiki/User:Wsiegmund
   
Physical Characteristics
 icon of manicon of flower
Caltha leptosepala is a PERENNIAL growing to 0.3 m (1ft) by 0.3 m (1ft in).
It is hardy to zone (UK) 3. It is in flower from May to June. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees, beetles, flies.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. Suitable pH: acid and neutral soils. It can grow in semi-shade (light woodland) or no shade. It prefers wet soil and can grow in water.

Synonyms
C. rotundifolia.

Habitats
 Pond; Bog Garden;
Edible Uses
Edible Parts: Flowers;  Leaves;  Root.
Edible Uses:

Root - it must be well cooked[172]. Some caution is advised, see the notes above on toxicity. Flower buds - raw, cooked or pickled and used as a caper substitute[85, 105, 172, 183]. Some caution is advised, see the notes above on toxicity. Young leaves, before the flowers emerge are eaten raw or cooked[85, 172, 183]. Some caution is advised, see the notes above on toxicity. Older leaves, before the plant flowers, can be eaten if well cooked[85]. Some caution is advised, see the notes above on toxicity.
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.

Antispasmodic;  Expectorant;  Poultice;  Warts.

The whole plant is antispasmodic and expectorant. It has been used to remove warts[172]. A poultice of the chewed roots has been applied to inflamed wounds[257].
Other Uses
None known
Cultivation details
A plant of the waterside, it prefers growing in a sunny position in wet soils or shallow water[1, 111, 233], though it will tolerate drier conditions if there is shade from the summer sun[233]. It requires a deep rich slightly acidic soil[111, 200]. Grows well in heavy clay soils. Plants are hardy to about -20c[187]. A greedy plant, inhibiting the growth of nearby plants, especially legumes[54].
Propagation
Seed - best sown as soon as it is ripe in a cold frame in late summer[200]. Stand the pots in 2 - 3cm of water to keep the soil wet. The seed usually germinates in 1 - 3 months at 15°c[138]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in a tray of water in a cold frame until they are at least 15cm tall. Plant them out into their permanent positions in the summer. Division in early spring or autumn[200]. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the summer or following spring.

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Other Names
Found In
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 :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Caltha leptosepala howellii 20
Caltha natansFloating marsh marigold11
Caltha palustrisMarsh Marigold, Yellow marsh marigold22
Caltha sinogracilis 10
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Botanical References
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Subject : Caltha leptosepala  

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