Podocarpus


Also found in: Dictionary, Thesaurus, Wikipedia.

Podocarpus

 

a genus of coniferous plants of the family Podocarpaceae (Taxaceae). The plants are dioecious (very rarely monoecious) evergreen trees or shrubs. The alternate or, less frequently, opposite leaves vary in size and shape. They range from scalelike forms measuring about 2 mm long to acicular, linear, lanceolate, elliptic, and ovate forms reaching 25–30 cm in length and 5 cm in width. Thus, many bear little resemblance to the leaves of conifers. The cylindrical male spikelets, or micro-strobiles, are solitary or in bunches (rarely in spikes) and consist of numerous microsporophylls bearing two sporangia each. The female spikelets, or megastrobiles, are solitary (rarely in spikes) and consist of one or, less frequently, two seed embryos surrounded by modified scales (epimacium) and attached to the axil by a fertile sheathing scale. In many species the bases of the fertile and the one or two sterile scales fuse together with the strobile axis; they then become fleshy and form a thickened stem that supports the seeds. The seeds are nutlike or drupaceous, measure 0.6–3.5 cm long, and are frequently colored.

There are more than 100 species of Podocarpus, found mainly in mountain forests of the tropical and subtropical belts of the southern hemisphere. Only a few species are found north of the equator, reaching the West Indies in the western hemisphere and the Himalayas, China, and Japan in Asia. Some species are valued for their wood. Several species are cultivated; in the USSR they are found on the Black Sea coast of the Caucasus and along the southern coast of the Crimea. The genus Podocarpus contains the only parasitic coniferous plant, P. ustus, which attacks a woody plant of the same family—Falcatifolium, or Dacrydium, taxoides.

REFERENCES

Derev’ia i kustarniki SSSR, vol. 1. Moscow-Leningrad, 1949.
Gray, N. E. “A Taxonomic Revision of Podocarpus.”
Journal of the Arnold Arboretum. Harvard University, 1962, vol. 43, no. 1.
Pilger, R. “Podocarpaceae.” In Die natiirlichen Pflanzenfamilien, vol. 13, 2nd ed. Edited by A. Engler. Leipzig, 1926.

V. N. GLADKOVA

References in periodicals archive ?
For one of the three species, found close to the northern border of Podocarpus National Park, was established the monospecific genus Acanthoraculus Braun & Morris 2009, and the two genera were united within the small tribe Ecuanedubini.
The structure of ponasterone A, an insect moulting hormone from the leaves of Podocarpus nakaii Hay.
En la conifera arborea Podocarpus polystachyus aumento en 81% la biomasa foliar en suelo con 2,5% de petroleo por efecto de la fertilizacion con residuos vegetales de soya (Dadrasnia y Agamuthu, 2013).
Resposta de sementes de Podocarpus lambertii e Podocarpus sellowii (podocarpaceae) a dessecacao.
2005) reported no differences in size distribution of WSA between a native Podocarpus spp.
El estrato arboreo esta compuesto por cuatro especies y dominado por Weinmannia tomentosa, tambien se encuentra Podocarpus oleifolius, Ocotea calophylla y Stiloceras sp.
Lycopodium thyoides and Podocarpus oleifolius were separated from each other with a maximum resolution.
Effects of felling Podocarpus glomeratus (Podocarpaceae) on the structure of Andean cloud forest (Cochabamba, Bolivia)
Las plantas ornamentales e industriales propias de America Latina incluyen el podocarpus, la ceiba y cientos de especies.
Sprayed at blossom time, it works on carob, carrotwood, elm, maple, oak, pine, podocarpus and more.
Also a first in the UAE, was the use of 'Bonsai' shaped Podocarpus trees.
patula (pino colorado), y Abies religiosa (oyamel); otras especies que se desarrollan en esta region son: Weinmannia pinnata, Podocarpus matudai, Oreopanax xalapensis y Befaria glauca (Ern H.