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Useful Temperate Plants

Lactuca perennis

L.

Asteraceae


The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.

+ Synonyms

Common Name: Perennial Lettuce

No Image.

General Information

Lactuca perennis is a Perennial up to 0.60 metres tall.
It has edible and medicinal uses.

Known Hazards

Although no specific mention of toxicity has been seen for this species, many plants in this genus contain a narcotic principle, this is at its most concentrated when the plant begins to flower. This principle has been almost bred out of the cultivated forms of lettuce but is produced when the plant starts to go to seed[
13
Title
Hamlyn Encyclopaedia of Plants.
Publication
 
Author
Triska. Dr.
Publisher
Hamlyn
Year
1975
ISBN
0-600-33545-3
Description
Very interesting reading, giving some details of plant uses and quite a lot of folk-lore.
].

Botanical References

50
Title
Flora Europaea
Publication
 
Author
?
Publisher
Cambridge University Press
Year
1964
ISBN
-
Description
An immense work in 6 volumes (including the index). The standard reference flora for Europe, it is very terse though and with very little extra information. 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.

Range

S. Europe.

Habitat

Rocky or other dry places, especially on calcareous soils[
27
Title
The Vegetable Garden.
Publication
 
Author
Vilmorin. A.
Publisher
Ten Speed Press
Year
 
ISBN
0-89815-041-8
Description
A reprint of a nineteenth century classic, giving details of vegetable varieties. Not really that informative though.
,
50
Title
Flora Europaea
Publication
 
Author
?
Publisher
Cambridge University Press
Year
1964
ISBN
-
Description
An immense work in 6 volumes (including the index). The standard reference flora for Europe, it is very terse though and with very little extra information. Not for the casual reader.
].

Properties

Edibility Rating *  *  *
Medicinal Rating *  *
HabitPerennial
Height0.60 m
PollinatorsInsects
Self-fertileYes
Cultivation StatusWild

Cultivation Details

Prefers a light well-drained sandy loam and a sunny position[
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.
].
Plants are hardy to about -25°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.
].

Edible Uses

Leaves - raw or cooked[
27
Title
The Vegetable Garden.
Publication
 
Author
Vilmorin. A.
Publisher
Ten Speed Press
Year
 
ISBN
0-89815-041-8
Description
A reprint of a nineteenth century classic, giving details of vegetable varieties. Not really that informative though.
,
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
61
Title
A Dictionary of Plants Used by Man.
Publication
 
Author
Usher. G.
Publisher
Constable
Year
1974
ISBN
0094579202
Description
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
,
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.
,
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.
]. The leaves are often blanched to reduce any bitterness. They are fairly acceptable raw in salads (even without being blanched), especially in late winter and spring when the flavour is quite mild[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. The leaves do become much more bitter in the summer, however, especially as the plant comes into flower[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

Medicinal

Although we have seen no specific reports for this species, most if not all members of the genus have a milky sap that contains the substance 'lactucarium' and can probably be used as the report below details[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

The whole plant is rich in a milky sap that flows freely from any wounds. This hardens and dries when in contact with the air[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
]. The sap contains 'lactucarium', which is used in medicine for its anodyne, antispasmodic, digestive, diuretic, hypnotic, narcotic and sedative properties[
9
Title
Edible and Medicinal Plants.
Publication
 
Author
Launert. E.
Publisher
Hamlyn
Year
1981
ISBN
0-600-37216-2
Description
Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.
,
21
Title
The Herb Book.
Publication
 
Author
Lust. J.
Publisher
Bantam books
Year
1983
ISBN
0-553-23827-2
Description
Lots of information tightly crammed into a fairly small book.
,
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
165
Title
The Dictionary of Modern Herbalism.
Publication
 
Author
Mills. S. Y.
Publisher
 
Year
 
ISBN
 
Description
An excellent small herbal.
,
192
Title
Narcotic Plants
Publication
 
Author
Emboden. W.
Publisher
Studio Vista
Year
1979
ISBN
0-289-70864-8
Description
A lot of details about the history, chemistry and use of narcotic plants, including hallucinogens, stimulants, inebriants and hypnotics.
,
213
Title
Earth Medicine, Earth Food.
Publication
 
Author
Weiner. M. A.
Publisher
Ballantine Books
Year
1980
ISBN
0-449-90589-6
Description
A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.
,
238
Title
Encyclopaedia of Herbs and their Uses.
Publication
 
Author
Bown. D.
Publisher
Dorling Kindersley, London.
Year
1995
ISBN
0-7513-020-31
Description
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
]. Lactucarium has the effects of a feeble opium, but without its tendency to cause digestive upsets[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
], nor is it addictive[
7
Title
Encyclopaedia of Medicinal Plants.
Publication
 
Author
Chiej. R.
Publisher
MacDonald
Year
1984
ISBN
0-356-10541-5
Description
Covers plants growing in Europe. Also gives other interesting information on the plants. Good photographs.
]. It is taken internally in the treatment of insomnia, anxiety, neuroses, hyperactivity in children, dry coughs, whooping cough, rheumatic pain etc[
238
Title
Encyclopaedia of Herbs and their Uses.
Publication
 
Author
Bown. D.
Publisher
Dorling Kindersley, London.
Year
1995
ISBN
0-7513-020-31
Description
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
]. Concentrations of lactucarium are low in young plants and most concentrated when the plant comes into flower[
238
Title
Encyclopaedia of Herbs and their Uses.
Publication
 
Author
Bown. D.
Publisher
Dorling Kindersley, London.
Year
1995
ISBN
0-7513-020-31
Description
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
]. It is collected commercially by cutting the heads of the plants and scraping the juice into china vessels several times a day until the plant is exhausted[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
]. An infusion of the fresh or dried flowering plant can also be used[
9
Title
Edible and Medicinal Plants.
Publication
 
Author
Launert. E.
Publisher
Hamlyn
Year
1981
ISBN
0-600-37216-2
Description
Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.
].
The plant should be used with caution, and never without the supervision of a skilled practitioner. Even normal doses can cause drowsiness whilst excess causes restlessness[
238
Title
Encyclopaedia of Herbs and their Uses.
Publication
 
Author
Bown. D.
Publisher
Dorling Kindersley, London.
Year
1995
ISBN
0-7513-020-31
Description
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
] and overdoses can cause death through cardiac paralysis[
7
Title
Encyclopaedia of Medicinal Plants.
Publication
 
Author
Chiej. R.
Publisher
MacDonald
Year
1984
ISBN
0-356-10541-5
Description
Covers plants growing in Europe. Also gives other interesting information on the plants. Good photographs.
,
9
Title
Edible and Medicinal Plants.
Publication
 
Author
Launert. E.
Publisher
Hamlyn
Year
1981
ISBN
0-600-37216-2
Description
Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.
].
Some physicians believe that any effects of this medicine are caused by the mind of the patient rather than by the medicine[
213
Title
Earth Medicine, Earth Food.
Publication
 
Author
Weiner. M. A.
Publisher
Ballantine Books
Year
1980
ISBN
0-449-90589-6
Description
A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.
].
The sap has also been applied externally in the treatment of warts[
222
Title
A Field Guide to Medicinal Plants. Eastern and Central N. America.
Publication
 
Author
Foster. S. & Duke. J. A.
Publisher
Houghton Mifflin Co.
Year
1990
ISBN
0395467225
Description
A concise book dealing with almost 500 species. A line drawing of each plant is included plus colour photographs of about 100 species. Very good as a field guide, it only gives brief details about the plants medicinal properties.
].

Other Uses

None known

Propagation

Seed - sow mid spring in a greenhouse, only just covering the seed. Germination is usually fairly quick When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Division in spring. It is best to pot up the divisions and keep them in a lightly shaded position in a cold frame until they are growing away well. Plant them out in the summer.
Root cuttings in spring[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

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