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Useful Temperate Plants

Caltha leptosepala

DC.

Ranunculaceae


Caltha leptosepala is morphologically complex, and a number of segregate taxa have been described. Plants are most commonly assigned to two species, however. Caltha leptosepala in the strict sense is found in the Rocky Mountains of Arizona and New Mexico north to Alaska and is characterized by longer-than-broad leaves with small, nonoverlapping basal lobes, solitary-flowered inflorescences, and sessile follicles. Plants in the Coast Ranges of central California north to the coastal islands of southern Alaska, distinguished by broader-than-long leaves with large, overlapping basal lobes, 2-flowered inflorescences, and stipitate follicles, have been called Caltha.biflora . My comparison of specimens from the Rocky Mountains and the Coast Ranges indicated that no clear distinction could be made. While plants are often distinctive in the southern part of their range, a continuous intergradation between the two extremes exists over much of their range[
270
Title
Flora of N. America
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/fna/
Publisher
 
Year
0
ISBN
 
Description
An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
].

+ Synonyms

Caltha auriculata (Raf.) Merr.

Caltha biflora DC.

Caltha chelidonii Greene

Caltha chionophila Greene

Caltha howellii (Hutch.) Greene

Caltha lasopetala Steud.

Caltha leptostachya G.Don

Caltha macounii Greene

Caltha malvacea Greene

Caltha rotundifolia (Huth) Greene

Caltha uniflora Rydb.

Psychrophila leptosepala (DC.) W.A. Weber

Common Name: Western Marsh Marigold

Caltha leptosepala
Flowering plant in native habitat
Photograph by: Mount Rainier National Park
Creative Commons License

General Information

Caltha leptosepala is a herbaceous perennial plant producing a cluster of basal leaves up to 15cm tall and flowering stems up to 30cm tall[
270
Title
Flora of N. America
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/fna/
Publisher
 
Year
0
ISBN
 
Description
An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
].
The plant is sometimes harvested from the wild for local use as a medicine and, in emergencies, as a food. It is grown as an ornamental in gardens.
The species has a relatively restricted range, but much larger than the thresholds for a threatened category and while it is possibly declining in parts of its range, it is not thought that any global population decline is likely to meet (or be close to meeting) the threshold for Vulnerable. The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2013)[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
].

Known Hazards

The whole plant, but especially the older portions, contains the toxic glycoside protoanemonin - this is destroyed by heat[
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
]. Symptoms of poisoning include a burning sensation in the throat, vomiting, bloody diarrhoea, dizziness, fainting, and, in large doses, convulsions. However, the toxicity is of a fairly low order and the plant would usually need to be eaten in quantity in order to cause major symptoms[
293
Title
Poisonous Plants of North Carolina
Publication
 
Author
 
Website
http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm
Publisher
 
Year
0
ISBN
 
Description
An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes.
]
The sap can irritate sensitive skin[
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
].

Botanical References

60
Title
Vascular Plants of the Pacific Northwest.
Publication
 
Author
Hitchcock. C. L.
Publisher
University of Washington Press
Year
1955
ISBN
-
Description
A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is not for the casual reader.
,
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
270
Title
Flora of N. America
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/fna/
Publisher
 
Year
0
ISBN
 
Description
An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.

Range

Western N. America - Alaska and Yukon, south to California, Arizona and New Mexico

Habitat

Open, wet, subalpine and alpine marshes, wet seepages and marshy meadows; at elevations from 750 - 3,900 metres[
60
Title
Vascular Plants of the Pacific Northwest.
Publication
 
Author
Hitchcock. C. L.
Publisher
University of Washington Press
Year
1955
ISBN
-
Description
A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is not for the casual reader.
,
85
Title
Edible Native Plants of the Rocky Mountains.
Publication
 
Author
Harrington. H. D.
Publisher
University of New Mexico Press
Year
1967
ISBN
0-8623-0343-9
Description
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.
,
270
Title
Flora of N. America
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/fna/
Publisher
 
Year
0
ISBN
 
Description
An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
].

Properties

Conservation StatusLeast Concern
Edibility Rating *  *
Medicinal Rating *  *
HabitPerennial
Height0.30 m
PollinatorsBees, Beetles, Flies
Cultivation StatusOrnamental, Wild

Cultivation Details

Caltha leptosepala has a very wide native range, from the Arctic of Alaska to the warm temperate climate of California and New Mexico. It can tolerate temperatures falling to around -20°c[
187
Title
Perennials. Volumes 1 and 2.
Publication
 
Author
Phillips. R. & Rix. M.
Publisher
Pan Books
Year
1991
ISBN
0-330-30936-9
Description
Photographs of over 3,000 species and cultivars of ornamental plants together with brief cultivation notes, details of habitat etc.
].
A plant of the waterside, it prefers growing in a sunny position in wet soils or shallow water[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
,
111
Title
Popular Hardy Perennials.
Publication
 
Author
Sanders. T. W.
Publisher
Collingridge
Year
1926
ISBN
-
Description
A fairly wide range of perennial plants that can be grown in Britain and how to grow them.
,
233
Title
Perennial Garden Plants
Publication
 
Author
Thomas. G. S.
Publisher
J. M. Dent & Sons, London.
Year
1990
ISBN
0 460 86048 8
Description
A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
], though it will tolerate drier conditions if there is shade from the summer sun[
233
Title
Perennial Garden Plants
Publication
 
Author
Thomas. G. S.
Publisher
J. M. Dent & Sons, London.
Year
1990
ISBN
0 460 86048 8
Description
A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
]. It requires a deep rich slightly acidic soil[
111
Title
Popular Hardy Perennials.
Publication
 
Author
Sanders. T. W.
Publisher
Collingridge
Year
1926
ISBN
-
Description
A fairly wide range of perennial plants that can be grown in Britain and how to grow them.
,
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Grows well in heavy clay soils.
A greedy plant, inhibiting the growth of nearby plants, especially legumes[
54
Title
How to Enjoy your Weeds.
Publication
 
Author
Hatfield. A. W.
Publisher
Frederick Muller Ltd
Year
1977
ISBN
0-584-10141-4
Description
Interesting reading.
].

Edible Uses

Root - it must be well cooked[
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
]. A survival food, used when all else fails[
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
]. Some caution is advised, see the notes above on toxicity.

Flower buds - raw, cooked or pickled and used as a caper substitute[
85
Title
Edible Native Plants of the Rocky Mountains.
Publication
 
Author
Harrington. H. D.
Publisher
University of New Mexico Press
Year
1967
ISBN
0-8623-0343-9
Description
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.
,
105
Title
Tanaka's Cyclopedia of Edible Plants of the World.
Publication
 
Author
Tanaka. T. & Nakao S.
Publisher
Keigaku Publishing; Tokyo
Year
1976
ISBN
-
Description
The most comprehensive list of edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
,
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
,
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
]. Some caution is advised, see the notes above on toxicity.

Young leaves, before the flowers emerge are eaten raw or cooked[
85
Title
Edible Native Plants of the Rocky Mountains.
Publication
 
Author
Harrington. H. D.
Publisher
University of New Mexico Press
Year
1967
ISBN
0-8623-0343-9
Description
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.
,
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
,
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
]. Some caution is advised, see the notes above on toxicity.
Older leaves, before the plant flowers, can be eaten if well cooked[
85
Title
Edible Native Plants of the Rocky Mountains.
Publication
 
Author
Harrington. H. D.
Publisher
University of New Mexico Press
Year
1967
ISBN
0-8623-0343-9
Description
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.
]. Some caution is advised, see the notes above on toxicity.

Medicinal

The whole plant is antispasmodic and expectorant. It has been used to remove warts[
172
Title
Discovering Wild Plants - Alaska, W. Canada and the Northwest.
Publication
 
Author
Schofield. J. J.
Publisher
Alaska Northwest Books; Alaska
Year
2003
ISBN
0882403699
Description
A nice guide to some useful plants in that area.
]. A poultice of the chewed roots has been applied to inflamed wounds[
257
Title
Native American Ethnobotany
Publication
 
Author
Moerman. D.
Publisher
Timber Press. Oregon.
Year
1998
ISBN
0-88192-453-9
Description
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.
].

Other Uses

None known

Propagation

Seed - best sown as soon as it is ripe in a cold frame in late summer[
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. 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
Title
Growing from Seed. Volume 3.
Publication
 
Author
Bird. R. (Editor)
Publisher
Thompson and Morgan.
Year
1989
ISBN
-
Description
Very readable magazine with lots of information on propagation.
]. 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
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. 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.
Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2018-07-17. <temperate.theferns.info/plant/Caltha+leptosepala>

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