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Pinus cembroides

Common name: Mexican Pine Nut Family: Pinaceae
Author: Zucc. Botanical references: 11, 82, 200
Synonyms:  
Known Hazards: The wood, sawdust and resins from various species of pine can cause dermatitis in sensitive people[222].
Range: Southern N. America - Arizona to Texas, south to Mexico.
Habitat: Hot arid mountain slopes above 2000 metres, with juniper and scrub oak[82, 181]. Usually in poor, shallow, rocky or gravelly soils[229].
Edibility Rating (1-5): 4Medicinal Rating (1-5):2

Other Common Names:From various places around the Web, may not be correct. See below.
Mexican Pinyon [P,FEIS,L,B],
Systematics:From a USDA Plants Database
Order: Pinales. Pine family

Physical Characteristics

An evergreen tree growing to 8m by 5m at a slow rate. It is hardy to zone 8. It is in leaf all year, in flower from May to June, and the seeds ripen in October. The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Wind. The plant not is self-fertile. We rate it 4/5 for edibility and 2/5 for medicinal use.

The plant prefers light (sandy) and medium (loamy) soils, requires well-drained soil and can grow in nutritionally poor soil. The plant prefers acid and neutral soils. It cannot grow in the shade. It requires dry or moist soil and can tolerate drought.

Habitats and Possible Locations

Woodland, Canopy.

Edible Uses

Condiment; Inner bark; Seed.

Seed - the oily seed kernel is eaten raw, roasted, ground into a powder for making bread, cakes etc or made into a nut butter[1, 2, 11, 34, 62, 63, 92, 94, 183]. An excellent flavour[227]. A good size, the seeds are up to 15mm long[200]. Said to be the highest in protein and lowest in starch of all the piñons[183]. The seed contains about 14.6% protein, 62% fat. 17.3% carbohydrate[85]. This species provides a major source of seeds for sale in Mexico[229].
Inner bark - only used in times of dire need[85]. There are no more details but inner bark is often dried, ground into a powder and then used as a thickener in soups etc or added to cereals when making bread.
A vanillin flavouring is obtained as a by-product of other resins that are released from the pulpwood[200].

Medicinal Uses

Disclaimer

Poultice.

The gum exuding from damaged areas of the tree is used to treat sore throats[92, 117].
The turpentine obtained from the resin of all pine trees is antiseptic, diuretic, rubefacient and vermifuge[4]. It is a valuable remedy used internally in the treatment of kidney and bladder complaints and is used both internally and as a rub and steam bath in the treatment of rheumatic affections[4]. It is also very beneficial to the respiratory system and so is useful in treating diseases of the mucous membranes and respiratory complaints such as coughs, colds, influenza and TB[4]. Externally it is a very beneficial treatment for a variety of skin complaints, wounds, sores, burns, boils etc and is used in the form of liniment plasters, poultices, herbal steam baths and inhalers[4].

Other Uses

Adhesive; Dye; Herbicide; Pitch; Wood.

A tan or green dye is obtained from the needles[168].
The needles contain a substance called terpene, this is released when rain washes over the needles and it has a negative effect on the germination of some plants, including wheat[201].
A gum pitch is used as a glue for waterproofing and repairing pottery[117, 227].
Oleo-resins are present in the tissues of all species of pines, but these are often not present in sufficient quantity to make their extraction economically worthwhile[64]. The resins are obtained by tapping the trunk, or by destructive distillation of the wood[4, 64]. In general, trees from warmer areas of distribution give the higher yields[64]. Turpentine consists of an average of 20% of the oleo-resin[64] and is separated by distillation[4, 64]. Turpentine has a wide range of uses including as a solvent for waxes etc, for making varnish, medicinal etc[4]. Rosin is the substance left after turpentine is removed. This is used by violinists on their bows and also in making sealing wax, varnish etc[4]. Pitch can also be obtained from the resin and is used for waterproofing, as a wood preservative etc.
Wood - soft, light, close-grained[82]. Somewhat fragrant when burnt[227]. Used for fuel and posts, but rarely for lumber[227].

Cultivation details

Thrives in a light well-drained sandy or gravelly loam[1, 11]. Dislikes poorly drained moorland soils[1]. Established plants tolerate drought, succeeding in hot, dry positions[200].
This species is not hardy in the colder areas of the country, it tolerates temperatures down to between -5 and -10°c[200].
Leaf secretions inhibit the germination of seeds, thereby inhibiting the growth of other plants below the tree[18].
A slow growing plant[81, 120], it takes 25 years from seed before cones are formed[117]. The tree takes 250 - 350 years to reach full maturity[181].
The cones open and shed their seed whilst still attached to the tree[226].
Plants are strongly outbreeding, self-fertilized seed usually grows poorly[200]. They hybridize freely with other members of this genus[200].
This species is sometimes held to include a number of very similar species which are here treated as separate entities[81, 82]. See P. edulis, P. monophylla and P. quadrifolia. These species differ mainly in the number of leaves in a bundle[1].
The sub-species P. cembroides orizabensis. D. Baill. has larger seeds than the type[200].
Plants in this genus are notably susceptible to honey fungus[200].

Propagation

It is best to sow the seed in individual pots in a cold frame as soon as it is ripe if this is possible otherwise in late winter. A short stratification of 6 weeks at 4°c can improve the germination of stored seed[80]. Plant seedlings out into their permanent positions as soon as possible and protect them for their first winter or two[11]. Plants have a very sparse root system and the sooner they are planted into their permanent positions the better they will grow[K]. Trees should be planted into their permanent positions when they are quite small, between 30 and 90cm[200]. We actually plant them out when they are about 5 - 10cm tall. So long as they are given a very good weed-excluding mulch they establish very well[K]. Larger trees will check badly and hardly put on any growth for several years. This also badly affects root development and wind resistance[200].
Cuttings. This method only works when taken from very young trees less than 10 years old. Use single leaf fascicles with the base of the short shoot. Disbudding the shoots some weeks before taking the cuttings can help. Cuttings are normally slow to grow away[81].

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

PFAF Web Pages

This plant is mentioned in the following web pages

Web References

References for the family Pinaceae.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[4] Grieve. A Modern Herbal. Penguin 1984 ISBN 0-14-046-440-9
Not so modern (1930's?) but lots of information, mainly temperate plants.

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[18] Philbrick H. and Gregg R. B. Companion Plants. Watkins 1979
Details of beneficial and antagonistic relationships between neighbouring plants.

[34] Harrison. S. Wallis. M. Masefield. G. The Oxford Book of Food Plants. Oxford University Press 1975
Good drawings of some of the more common food plants from around the world. Not much information though.

[62] Elias. T. and Dykeman. P. A Field Guide to N. American Edible Wild Plants. Van Nostrand Reinhold 1982 ISBN 0442222009
Very readable.

[63] Howes. F. N. Nuts. Faber 1948
Rather old but still a masterpiece. Has sections on tropical and temperate plants with edible nuts plus a section on nut plants in Britain. Very readable.

[64] Howes. F. N. Vegetable Gums and Resins. Faber
A very good book dealing with the subject in a readable way.

[80] McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books 1985 ISBN 0-901361-21-6
Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.

[81] Rushforth. K. Conifers. Christopher Helm 1987 ISBN 0-7470-2801-X
Deals with conifers that can be grown outdoors in Britain. Good notes on cultivation and a few bits about plant uses.

[82] Sargent. C. S. Manual of the Trees of N. America. Dover Publications Inc. New York. 1965 ISBN 0-486-20278-X
Two volumes, a comprehensive listing of N. American trees though a bit out of date now. Good details on habitats, some details on plant uses. Not really for the casual reader.

[85] Harrington. H. D. Edible Native Plants of the Rocky Mountains. University of New Mexico Press 1967 ISBN 0-8623-0343-9
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.

[92] Balls. E. K. Early Uses of Californian Plants. University of California Press 1975 ISBN 0-520-00072-2
A nice readable book.

[94] Sweet. M. Common Edible and Useful Plants of the West. Naturegraph Co. 1962 ISBN 0-911010-54-8
Useful wild plants in Western N. America. A pocket guide.

[117] Rosengarten. jnr. F. The Book of Edible Nuts. Walker & Co. 1984 ISBN 0802707699
A very readable and comprehensive guide. Well illustrated.

[120] ? The Plantsman. Vol. 2. 1980 - 1981. Royal Horticultural Society 1980
Excerpts from the periodical giving cultivation details and other notes on some of the useful plants including Billardiera spp, Calochortus spp, Drimys spp.

[168] Grae. I. Nature's Colors - Dyes from Plants. MacMillan Publishing Co. New York. 1974 ISBN 0-02-544950-8
A very good and readable book on dyeing.

[181] Pesman. M. W. Meet Flora Mexicana. Dale S. King. Arizona. 1962
Very readable flora but rather lacking botanically. A few notes on useful plants.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
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.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[201] Allardice.P. A - Z of Companion Planting. Cassell Publishers Ltd. 1993 ISBN 0-304-34324-2
A well produced and very readable book.

[222] Foster. S. & Duke. J. A. A Field Guide to Medicinal Plants. Eastern and Central N. America. Houghton Mifflin Co. 1990 ISBN 0395467225
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.

[226] Lauriault. J. Identification Guide to the Trees of Canada Fitzhenry and Whiteside, Ontario. 1989 ISBN 0889025649
Very good on identification for non-experts, the book also has a lot of information on plant uses.

[227] Vines. R.A. Trees of North Texas University of Texas Press. 1982 ISBN 0292780206
A readable guide to the area, it contains descriptions of the plants and their habitats with quite a bit of information on plant uses.

[229] Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. 1980 ISBN 0442238622
A very good concise guide. Gives habitats, good descriptions, maps showing distribution and a few of the uses. It also includes the many shrubs that occasionally reach tree proportions.

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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