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Juniperus tetragona

Common name:		Family:	Cupressaceae
Author:	Schltdl.	Botanical references:	1
Synonyms:	Juniperus mexicana (Schlecht. & Cham.)
Known Hazards:	None known
Range:	South-western N. America - Texas to Mexico.
Habitat:	Pine-oak forests in mountains, to 4500 metres in Mexico[181].
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	0

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	J. ashei[B,G,HORTIPLEX,P] J. deppeana[B,E,G,HPIC,HORTIPLEX,P] J. deppeana ssp. sperryi[B,P] J. deppeana var. pachyphlaea[B,P] J. deppeana var. sperryi[B,P] J. occidentalis var. conjungens[B,P] J. occidentalis var. texana[B,P] J. pachyderma[B,P] J. pachyphloea[G] J. sabinoides[B] J. sabinoides sensu[P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Alligator Juniper [DEN2,P,B,FEIS], Ashe Juniper [FEIS], Ashe's Juniper [B,P],
Epithets:	From a Dictionary of Botanical Epithets
	tetragona = 4 angled
Systematics:	From a USDA Plants Database
	Order: Pinales. Cypress family
Other Range Info:	From the Ethnobotany Database
	Mexico

Physical Characteristics

An evergreen tree. It is hardy to zone 8. It is in leaf all year, and the seeds ripen in October. The flowers are dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required) and are pollinated by Wind. The plant not is self-fertile. We rate it 2/5 for edibility and 0/5 for medicinal use.

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

Habitats and Possible Locations

Woodland, Canopy, Sunny Edge.

Edible Uses

Fruit.

Fruit - raw or cooked[105]. A sweet resinous flesh[181]. The fruits are about 12mm in diameter[2].

Medicinal Uses

Disclaimer

None known

Other Uses

Wood.

Wood - brown, hard. Used for construction etc[61].

Cultivation details

Succeeds in most soils if they are well drained, preferring a neutral or slightly alkaline soil[1] and succeeding on chalk[200]. A drought tolerant plant once established, succeeding in hot dry positions[200].
This species is not very hardy in Britain[1].
Dioecious. Male and female plants must be grown if seed is required.

Propagation

The seed requires a period of cold stratification. The seed has a hard seedcoat and can be very slow to germinate, requiring a cold period followed by a warm period and then another cold spell, each of 2 - 3 months duration[78, 81]. Soaking the seed for 3 - 6 seconds in boiling water may speed up the germination process[11]. The seed is best sown as soon as it is ripe in a cold frame. Some might germinate in the following spring, though most will take another year. Another possibility is to harvest the seed 'green' (when the embryo has fully formed but before the seedcoat has hardened). The seedlings can be potted up into individual pots when they are large enough to handle. Grow on in pots until large enough, then plant out in early summer. When stored dry, the seed can remain viable for several years[1].
Cuttings of mature wood, 5 - 10cm with a heel, September/October in a cold frame. Plant out in the following autumn[1, 78].
Layering in September/October. Takes 12 months[78].

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

[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for Juniperus ashei (a possible synonym).

[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database
[FEIS] Data (Uses, Ecology, Fire Effects) from the USDA Forestry Service Fire Effects Information System.
[FEIS] Data (Uses, Ecology, Fire Effects) from the USDA Forestry Service Fire Effects Information System.

References for Juniperus deppeana (a possible synonym).

[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[V] Images from the Vascular Plant Image Gallery of the Texas A& M Bioinformatics Working Group.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database
[DEN] Data _ Photos (Good Identification info) from the Virginia Tech's Dendrology Deptarments' Tree Fact Sheets.
[FEIS] Data (Uses, Ecology, Fire Effects) from the USDA Forestry Service Fire Effects Information System.

References for juniperus deppeana (a possible synonym).

[HP] PhotoFrom Henriette's plant pictures
[HP] PhotoFrom Henriette's plant pictures

References for the family Cupressaceae.

[CHINA] Data Very detailed botanical/identification info. from the Flora of China.

See the PFAF Links Pages for other sources.

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

References

[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.

[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.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
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.

[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.

[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.

[105] Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976
The most comprehensive guide to 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.

[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.

[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.

Readers Comments

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
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