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Useful Temperate Plants

Taxus globosa

Schltdl.

Taxaceae


The species of Taxus are more geographically than morphologically separable; and they were all treated by Pilger (1903) as subspecies of Taxus baccata. All species are poisonous; most contain the anti-cancer agent taxol; and a study of heartwood constituents of Taxus baccata, Taxus brevifolia, Taxus cuspidata and Taxus floridana found them to be chemically almost identical. However, the vast ecological amplitude displayed by the various described species (over 60° of latitude and an impressive temperature and precipitation range) suggests that they are, in a meaningful sense, true species. Detailed study of the genus (not neglecting the cultivated representatives), including extensive fieldwork, is much needed and long overdue[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
A vast amount of information on conifers and families of gymnosperms.
].

+ Synonyms

Taxus baccata globosa (Schltdl.) Pilg.

Common Name: Mexican Yew

Taxus globosa
Drawing of a leafy branch and a fruit
Photograph by: S.H.Groves; Flora of Guatemala, Chicago Natural History Museum, 1958
Creative Commons License

General Information

Taxus globosa is an evergreen shrub or a tree that can grow up to 4.6 metres tall[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
A vast amount of information on conifers and families of gymnosperms.
], with specimens up to 15 metres reported in the highlands of Guatemala[
331
Title
Flora of Guatemala
Publication
 
Author
Standley P.C. & J. A. Steyermark
Website
http://www.archive.org/
Publisher
 
Year
1946 - 1976
ISBN
 
Description
A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
].
The tree is sometimes harvested from the wild for local use as a food and source of wood. It is a potential source of the anticancer drug 'taxol'.
Some interest has been shown by pharmaceutical companies in the medicinal properties of Taxus globosa. There is no evidence of active exploitation for that purpose. The principal threat to this species is the ongoing over-exploitation of the montane cloud forests throughout Mexico and Central America. The plant is classified as 'Endangered' 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

All parts of the plant, except the flesh of the fruit (actually an aril), are potentially highly poisonous. They contain the alkaloid taxine and , if ingested, can cause nervousness, trembling, slow pulse, pupil dilation, difficult breathing, abdominal pain, vomiting, diarrhoea, weakness and convulsions - in larger doses it can be fatal, having a paralyzing affect on the heart[
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]).
,
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.
,
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.
,
10
Title
Poisonous Plants and Animals.
Publication
 
Author
Altmann. H.
Publisher
Chatto and Windus
Year
1980
ISBN
0-7011-2526-8
Description
A small book, reasonable but not very detailed.
,
19
Title
Poisonous Plants.
Publication
 
Author
Stary. F.
Publisher
Hamlyn
Year
1983
ISBN
0-600-35666-3
Description
Not very comprehensive, but easy reading.
,
65
Title
A Colour Atlas of Poisonous Plants.
Publication
 
Author
Frohne. D. and Pfänder. J.
Publisher
Wolfe
Year
1984
ISBN
0723408394
Description
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.
,
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.
].

Botanical References

331
Title
Flora of Guatemala
Publication
 
Author
Standley P.C. & J. A. Steyermark
Website
http://www.archive.org/
Publisher
 
Year
1946 - 1976
ISBN
 
Description
A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/

Range

C. America - Honduras, El Salvador, Guatemala, northern, central and southern Mexico

Habitat

Low and middle tree layers of montane forest, oak forest, and pine-oak forest, where it is considered as a indicator species for cloud forest. It shows a strong preference for moist and shaded ravines. Found at elevations from 1,000 - 3,333 metres[
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.
].

Properties

Conservation StatusEndangered
Edibility Rating *  *
Medicinal Rating *  *
Other Uses Rating *  *
HabitEvergreen Tree
Height4.00 m
Growth RateSlow
PollinatorsWind
Self-fertileNo
Cultivation StatusWild

Cultivation Details

Taxus globosa is moderately cold hardy, tolerating occasional, short-lived temperatures falling to between -12.1°c and -6.7°c[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
A vast amount of information on conifers and families of gymnosperms.
].
Plants are very shade tolerant[
81
Title
Conifers.
Publication
 
Author
Rushforth. K.
Publisher
Christopher Helm
Year
1987
ISBN
0-7470-2801-X
Description
Deals with conifers that can be grown outdoors in Britain. Good notes on cultivation and a few bits about plant uses.
], though they can also succeed in full sun. They thrive in almost any soil, acid or alkaline, as long as it is well-drained[
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]).
,
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.
]. Succeeds in dry soils. Plants grow best in a position sheltered from cold, dry winds[
352
Title
KemperCentreForHomeGardeningPlantFinder
Publication
 
Author
 
Website
http://www.mobot.org/gardeninghelp/plantfinder/
Publisher
Missouri Botanical Garden
Year
0
ISBN
 
Description
Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
].
This species produces the largest fruits (arils) in the genus[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
A vast amount of information on conifers and families of gymnosperms.
].
As with most other Taxus species, Taxus globosa is a potential source of anti-cancer drugs. However, its subpopulations are likely to be too small and scattered to make harvesting of wild plants commercially viable. Plantation cultivation would be the only viable and sustainable option[
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.
]
A dioecious species, both male and female forms must be grown if fruit and seed are required.

Edible Uses

We have no specific information for this species, but the fruit (a fleshy aril) of all members of the genus should be edible. The following is a general description.
Fruit - raw[
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]).
,
2
Title
Sturtevant's Edible Plants of the World.
Publication
 
Author
Hedrick. U. P.
Publisher
Dover Publications
Year
1972
ISBN
0-486-20459-6
Description
Lots of entries, quite a lot of information in most entries and references.
,
65
Title
A Colour Atlas of Poisonous Plants.
Publication
 
Author
Frohne. D. and Pfänder. J.
Publisher
Wolfe
Year
1984
ISBN
0723408394
Description
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.
,
81
Title
Conifers.
Publication
 
Author
Rushforth. K.
Publisher
Christopher Helm
Year
1987
ISBN
0-7470-2801-X
Description
Deals with conifers that can be grown outdoors in Britain. Good notes on cultivation and a few bits about plant uses.
,
158
Title
Forest Flora of Chakrata, Dehra Dun and Saharanpur.
Publication
 
Author
Gupta. B. L.
Publisher
Forest Research Institute Press
Year
1945
ISBN
-
Description
A good flora for the middle Himalayan forests, sparsly illustrated. Not really for the casual reader.
]. Very sweet and gelatinous, most people find it delicious though some find it sickly[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. A number of people who like the flavour do not like the texture which is often described as being 'snotty'[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]
All other parts of this plant, including the seed, are highly poisonous. When eating the fruit you should spit out the large seed found in the fruit's centre. Should you swallow the whole seed it will just pass straight through you without harm. If it is bitten into, however, you will notice a very bitter flavour and the seed should immediately be spat out or it could cause some problems. The fruit is a fleshy berry about 10mm in diameter and containing a single seed[
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.
].

Medicinal

As with most other Taxus species, Taxus globosa is a potential source of anti-cancer drugs[
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.
].

Other Uses

The bark is said to be rich in tannin[
331
Title
Flora of Guatemala
Publication
 
Author
Standley P.C. & J. A. Steyermark
Website
http://www.archive.org/
Publisher
 
Year
1946 - 1976
ISBN
 
Description
A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
].

The heartwood is bright orange to brown, the thin band of sapwood is white. The texture is very fine and uniform; the grain straight or variable; lustre is rather high; it is free of an distinctive odour or taste. The wood is hard, moderately heavy, stiff, and elastic. It has long been used in Europe for making bows[
331
Title
Flora of Guatemala
Publication
 
Author
Standley P.C. & J. A. Steyermark
Website
http://www.archive.org/
Publisher
 
Year
1946 - 1976
ISBN
 
Description
A superb reference, though somewhat dated. Gives lots of plant uses as well as information on plant habit and habitat. The entire flora (13 volumes) can now be downloaded from http://www.archive.org/
].
Locally used for fence posts[
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.
].

Propagation

Seed - can be very slow to germinate, often taking 2 or more years[
78
Title
Propagation of Trees, Shrubs and Conifers.
Publication
 
Author
Sheat. W. G.
Publisher
MacMillan and Co
Year
1948
ISBN
-
Description
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
,
80
Title
Hardy Woody Plants from Seed.
Publication
 
Author
McMillan-Browse. P.
Publisher
Grower Books
Year
1985
ISBN
0-901361-21-6
Description
Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.
]. It is best sown as soon as it is ripe in the autumn when it should germinate 18 months later. Stored seed may take 2 years or more to germinate. 4 months warm followed by 4 months cold stratification may help reduce the germination time[
113
Title
The Reference Manual of Woody Plant Propagation.
Publication
 
Author
Dirr. M. A. and Heuser. M. W.
Publisher
Athens Ga. Varsity Press
Year
1987
ISBN
0942375009
Description
A very detailed book on propagating trees. Not for the casual reader.
]. Harvesting the seed 'green' (when fully developed but before it has dried on the plant) and then sowing it immediately has not been found to reduce the germination time because the inhibiting factors develop too early[
80
Title
Hardy Woody Plants from Seed.
Publication
 
Author
McMillan-Browse. P.
Publisher
Grower Books
Year
1985
ISBN
0-901361-21-6
Description
Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.
]. Prick out the seedlings into individual pots once they are large enough to handle and grow them on in pots in a cold frame. The seedlings are very slow-growing and will probably require at least 2 years of pot cultivation before being large enough to plant out. Any planting out is best done in late spring or early summer, after the last expected frosts[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Cuttings of half-ripe terminal shoots, 5 - 8cm long, July/August in a shaded frame. Should root by late September but leave them in the frame over winter and plant out in late spring[
78
Title
Propagation of Trees, Shrubs and Conifers.
Publication
 
Author
Sheat. W. G.
Publisher
MacMillan and Co
Year
1948
ISBN
-
Description
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
]. High percentage[
11
Title
Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement.
Publication
 
Author
Bean. W.
Publisher
Murray
Year
1981
ISBN
-
Description
A classic with a wealth of information on the plants, but poor on pictures.
].
Cuttings of ripe terminal shoots, taken in winter after a hard frost, in a shaded frame[
113
Title
The Reference Manual of Woody Plant Propagation.
Publication
 
Author
Dirr. M. A. and Heuser. M. W.
Publisher
Athens Ga. Varsity Press
Year
1987
ISBN
0942375009
Description
A very detailed book on propagating trees. Not for the casual reader.
].
Layering

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