Overview

Distribution

Range Description

Endemic to Taiwan, Province of China (Chianghua Co.?, Nantou Co., Taichung Co.). Records from Chinghua Co. originate from collections made in the early 19th century. This taxon has not been recollected in that area since then.
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C Taiwan
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Physical Description

Morphology

Description

Trees to 18 m tall; trunk to 1.8 m d.b.h.; bark pale gray, fibrous; branches terete, glabrous. Foliage buds globose; scales wholly overlapping, blunt at apex, primary scales triangular, secondary scales rounded. Leaves crowded at apex of branchlets, alternate; blade bright green adaxially, pale green (drying brownish) and glaucous abaxially, linear, linear-lanceolate, or lanceolate, straight or slightly falcate, 5-10.5 × 0.8-1.4 cm, 5-7 × as long as wide, leathery, midvein raised adaxially as a ridge at least 0.5 mm wide, a flat or slightly raised abaxially, base attenuate or cuneate into short petiole ca. 5 mm, margin narrow, slightly raised and thickened abaxially but not revolute, apex subacute or acute. Pollen cones axillary, solitary or in clusters of 2 or 3, sessile, 2-4 cm, with several spirally arranged, basal bracts. Seed-bearing structures axillary, solitary; peduncle 2-12 mm. Receptacle orange or scarlet when ripe, obconical-ellipsoid, 4-9 × 3-6 mm, with 2 inconspicuous, longitudinal grooves. Epimatium greenish. Seed solitary, axillary, ovoid or ellipsoid-ovoid, 1-1.2 cm × 7-8 mm, with a large crest, apex narrow, pointed.
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Diagnostic Description

Synonym

Podocarpus macrophyllus (Thunberg) Sweet var. nakaii (Hayata) H. L. Li & H. Keng.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Podocarpus nakaii occurs scattered in broad-leaved (angiosperm) forests in the central mountains of Taiwan. These forests are dominated by the families Fagaceae and Lauraceae, with Theaceae and Magnoliaceae also prominent. Characteristic genera of trees are Cyclobalanopsis (= Quercus), Lithocarpus, Machilus (= Persea), Cryptocarya, Schima, and Magnolia. The altitudinal range of this species rich evergreen forest type is from 700 to 1,800 m a.s.l. and it exists under a markedly monsoonal subtropical climate.

Systems
  • Terrestrial
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* Evergreen broad-leaved forests; 300-800 m.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Podocarpus nakaii

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Podocarpus nakaii

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B2ab(iii,v); C2a(i)

Version
3.1

Year Assessed
2013

Assessor/s
Thomas, P. & Farjon, A.

Reviewer/s
Luscombe, D & Carter, G.

Contributor/s

Justification
The most recent survey results indicate that Podocarpus nakaii has an area of occupancy less than 500 km2 (estimated to be a little as 64 km2), is known from a maximum of five locations and there has been a recent decline in the number of individuals. The total population size is estimated to be more than 250 but much less than 2,500 with no subpopulation having more than 250 individuals. Populations are under threat from increasing deforestation, agricultural activities and mature trees have been been uprooted for horticultural use. Consequently it is assessed as Endangered under criteria B and C.

History
  • 1998
    Endangered
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Population

Population
Subpopulations are small and isolated.

Population Trend
Decreasing
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Threats

Major Threats
This species although not specifically targeted by loggers as it is generally of only small to moderate size, has suffered greatly from general deforestation in the period after World War Two. Much of the primary forest where P. nakaii occurred has gone, or it has been turned into secondary vegetation unsuitable for this species. A locality in Chianghua where W.R. Price collected the species in 1912 probably no longer has it growing there; Flora of Taiwan, ed. 2, 1: 565 (1994) only mentions Nantou for its distribution. There are also recent reports of the removal of mature trees for horticultural use.
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Management

Conservation Actions

Conservation Actions
This species is being actively monitored by the Taiwan Endemic Species Research Unit.
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Wikipedia

Podocarpus nakaii

Podocarpus nakaii is a species of conifer in the Podocarpaceae family. It is found only in Taiwan. It is threatened by habitat loss.

Source


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