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Pinus ayacahuite - Ehrenb. ex Schltdl.
                 
Common Name Mexican White Pine
Family Pinaceae
USDA hardiness 6-9
Known Hazards The wood, sawdust and resins from various species of pine can cause dermatitis in sensitive people[222].
Habitats Lower pine forests in cool mountains in Mexico[181]. Sheltered valleys and mountain slopes at elevations of 2,400 - 3,300 metres[260].
Range Southern N. America - Mexico.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Well drained soil Moist Soil Full sun

Summary

Pinus ayacahuite Mexican White Pine


Pinus ayacahuite Mexican White Pine
   
Physical Characteristics
 icon of manicon of cone
Pinus ayacahuite is an evergreen Tree growing to 55 m (180ft 5in).
It is hardy to zone (UK) 7. It is in leaf 12-Jan, 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 is not self-fertile.
Suitable for: light (sandy) and medium (loamy) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid and neutral soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Synonyms

Habitats
Woodland Garden Canopy;
Edible Uses
Edible Parts: Seed.
Edible Uses: Condiment.

Seed - raw or cooked[183]. The seed is about 8mm long[200]. Rich in oil, the seed has a resinous flavour. A vanillin flavouring is obtained as a by-product of other resins that are released from the pulpwood[200].
Medicinal Uses
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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
Dye;  Herbicide;  Resin;  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]. 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.
Cultivation details
Thrives in a light well-drained sandy or gravelly loam[1]. Dislikes poorly drained moorland soils[1]. Established plants tolerate drought[200]. Growth of older trees tends to be very slow but many younger trees are growing fairly quickly averaging more than 30cm a year[185]. This tree is unique in being the only tree from the tropics (it is found between latitudes 14 and 20°north) to succeed in central Scotland, latitude 57°north[200]. It tolerates temperatures down to about -15°c[260]. 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]. Seed cones are up to 30cm long[200]. A tree at Kew in January 1995 was about 12 metres tall and had well over 50 large cones on it. Another mature tree of the same species growing nearby had only a very few cones[K]. Leaf secretions inhibit the germination of seeds, thereby inhibiting the growth of other plants below the tree[18]. 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].

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Other Names
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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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123
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Author
Ehrenb. ex Schltdl.
Botanical References
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Links / References
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Readers comment
 
Elizabeth H.
MIke O'Dwyer Tue Oct 28 2008
Hi there, I have been trying for the past few years to track down a couple of saplings of Pinus ayacahuite (either var. 'ayacahuite' or var. 'veitchii') but without success. Although saplings would be preferred, reliably sourced seed would be ok too. I would, of course, pay for the plants and cover P&P costs. Any help would be much appreciated, but please get in touch soon. All the best, Mike.
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Subject : Pinus ayacahuite  

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