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Useful Tropical Plants

Amentotaxus formosana

H.L.Li

Taxaceae


This species was formerly not recognized as being distinct from Amentotaxus argotaenia, and many earlier accounts of the flora of Taiwan refer to it under this name[
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.
].

+ Synonyms

Amentotaxus yunnanensis formosana (H.L.Li) Silba

Common Name: Taiwan Catkin Yew

No Image.

General Information

Amentotaxus formosana is an evergreen tree with a sparsely-branched crown; it can grow up to 10 metres tall. The bole can be 30cm in diameter[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
An extremely valuable website, providing a vast amount of information on conifers and families of gymnosperms.
].
The tree is harvested from the wild for local use of its wood. It is sometimes grown as an ornamental.
Until recently, the greatest threat to it appears to have been be conversion of native mixed evergreen forest to plantations with primarily Cryptomeria japonica. The declaration of a specific conservation area for this species within a larger reserve has reduced this threat. Stochastic events such as cyclones and landslides are additional threats, especially considering the small population size and limited distribution. The plant is classified as 'Vulnerable' 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

None known

Botanical References

266
Title
Flora of China
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/china/
Publisher
Missouri Botanical Garden Press; St. Louis.
Year
1994
ISBN
 
Description
An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
,
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
An extremely valuable website, providing a vast amount of information on conifers and families of gymnosperms.

Range

E. Asia - Taiwan

Habitat

An understorey tree in montane evergreen tropical rainforest and broad-leaved subtropical forest, usually found on steep slopes, in ravines, or on cliffs; at elevations from 900 - 1,300 metres, occasionally descending to 500 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 StatusVulnerable
Medicinal Rating *  *
Other Uses Rating *  *
HabitEvergreen Tree
Height8.00 m
PollinatorsWind
Self-fertileNo
Cultivation StatusOrnamental, Wild

Cultivation Details

Amentotaxus species are generally natives of warm temperate, subtropical and tropical forested areas in east Asia. Most are tolerant of some frost, but only if there has first been a hot summer to fully ripen the wood. They therefore usually only succeed outdoors in warm temperate to tropical areas[
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.
]. Amentotaxus formosana grows in the subtropical forests of Taiwan where the average annual temperature is 16°c, ranging from 10°c in the coldest month to 20°c in the warmest. Annual rainfall is 2,500 - 3,000 mm, the summer is wet and the winters are also damp, producing a perennially warm and humid climate[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
An extremely valuable website, providing a vast amount of information on conifers and families of gymnosperms.
]. Plants can tolerate some frost, withstanding short-lived temperatures falling as low as between -6.6°c and -1.1°c[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
An extremely valuable website, providing a vast amount of information on conifers and families of gymnosperms.
].
Succeeds in fairly dense shade when young but becoming more tolerant of full sun as it grows larger[
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 a wide range of soils, preferring one that is well-drained, moist and sandy[
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.
]. Usually found in the wild on soils derived from sandstone and shale[
329
Title
The Gymnosperm Database
Publication
 
Author
 
Website
http://www.conifers.org/index.htm
Publisher
 
Year
0
ISBN
 
Description
An extremely valuable website, providing a vast amount of information on conifers and families of gymnosperms.
].
This species is in cultivation as an ornamental tree in China, Japan and Taiwan, but very rare and only seen in some botanic gardens elsewhere. Its broad, white bands of stomata are very striking, although normally hidden from view on the underside of leaves. Lack of commercially available cuttings or seed has prevented this species from being grown more widely; it is obviously not suitable for climates with winter frost[
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 need to be grown if fruit and seed are required.

Edible Uses

None known

Medicinal

The leaves and stems of various species in this genus are being investigated as a potential source of compounds used in anti-cancer drugs[
1192
Title
Vietnam Conifers. Conservation Status Review 2004
Publication
 
Author
Nguyen Tien Hiep, Phan Ke Loc, Nguyen Duc To Luu, P.I. Thoma
Publisher
Fauna & Flora International, Vietnam Programme; Hanoi
Year
2004
ISBN
1-903703-16-6
Description
Information on more than 30 species of Conifer growing in Vietnam, giving a description, range, conservation status, uses etc. It can be downloaded as a PDf from the Internet.
].

Other Uses

The wood, though of small dimensions, is valued and used for the making of furniture, farm implements, tools and utensils, and wood turning for souvenirs[
266
Title
Flora of China
Publication
 
Author
 
Website
http://flora.huh.harvard.edu/china/
Publisher
Missouri Botanical Garden Press; St. Louis.
Year
1994
ISBN
 
Description
An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
,
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.
]. Seed voided by birds after they have eaten the fruit tends to germinate well, so scarifying the seed prior to sowing might be useful. Prick out the seedlings into individual pots once they are large enough to handle and grow them on until large enough to plant out, which can take more than 12 months.
Cuttings of half-ripe terminal shoots, 5 - 8cm long, in a shaded frame. Should root within 8 weeks. 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 the dormant season, 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.
].

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