Pilgerodendron uviferum

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Pilgerodendron uviferum
Pilgerodendron uviferum

Pilgerodendron uviferum

Systematics
Class : Coniferopsida
Order : Conifers (Coniferales)
Family : Cypress family (Cupressaceae)
Subfamily : Callitroideae
Genre : Pilgerodendron
Type : Pilgerodendron uviferum
Scientific name of the  genus
Pilgerodendron
Florin
Scientific name of the  species
Pilgerodendron uviferum
( D.Don ) Florin

Pilgerodendron uviferum , sometimes with the German name Chilean Incense Cedar referred to, is a plant from the family of the cypress family (Cupressaceae). It is the only species in the genus Pilgerodendron ; the conifer species isnative tosouthern South America .

description

Pilgerodendron uviferum grows as a small evergreen tree with a narrow, pyramidal tree crown . It can grow to heights of 1.5 to 10 meters, sometimes up to 18 meters. The trunk diameter can reach up to 35 centimeters. Specimens over 500 years old have been found. The bark of the trunk is dark brown and peels off in long vertical strips. The shoots are covered in four rows with scaly leaves that are 2 to 4 millimeters long and 1.5 to 3 millimeters wide and taper in a blunt tip.

Pilgerodendron uviferum is single sexed ( monoecious ). Male and female cones stand separately on different branches. The female cones are 8 to 10 millimeters long and about 8 millimeters wide; they have four to six scales. One or two two-winged seeds sit under the upper scales . The seeds are winged asymmetrically; the larger wing is about twice as large as the smaller one. There is a clear thorn on the back of each cone scale.

The number of chromosomes is 2n = 22.

Chilean river cedar ( Pilgerodendron uviferum )

Distribution and location

Pilgerodendron uviferum is native to southern Chile and Argentina . Its occurrences reach north in Chile up to about the 40th parallel, in Argentina it occurs from the 41st to the 47th parallel (Neuquén, Rio Negro, Santa Cruz, Tierra del Fuego). The occurrences in Chile extend far to the south, which makes Pilgerodendron uviferum the most southerly coniferous wood in America, perhaps even in the whole world.

Pilgerodendron uviferum thrives in Drimys-Nothofagus-betuloides coastal forests, but also in the open as a dominant tree species at altitudes from 0 to 150 meters. In the northern part of the distribution area it is often associated with the Patagonian cypress ( Fitzroya cupressoides ).

Pilgerodendron uviferum grows in very wet locations that never dry out and have constant rainfall almost all year round. The species is frost hardy down to about −20 ° C, but does not tolerate hot and dry summers.

Systematics

The first description of this species written by the British botanist David Don under the name (Basionym) Juniperus uvifera was published in 1828 in the work A description of the genus Pinus by Aylmer Bourke Lambert . The German botanist Robert Knud Friedrich Pilger named this way in a 1926 published contribution to the work The natural plant families of Adolf Engler and Carl Prantl in Libocedrus uvifera order. Carl Rudolf Florin assigned the currently accepted name Pilgerodendron uviferum in 1930 and thus placed the species in its own genus. The generic name honors the German botanist Robert Knud Friedrich Pilger (1876–1953).

swell

Individual evidence

  1. ^ Armin Jagel, Veit Dörken: Morphology and morphogenesis of the seed cones of the Cupressaceae - part III. Callitroideae. In: Bulletin of the Cupressus Conservation Project , Volume 4, No. 3, December 2015, pp. 91-103 ( PDF )
  2. ↑ Pilgerodendron uviferum at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 8, 2016.
  3. ↑ AB Lambert: Descr. Pinus ed. 2, 2: 116, 1828.
  4. ↑ Juniperus uvifera in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
  5. ^ HGA Engler & KAE Prantl, Nat. Plant family ed. 2, 13: 389. 1926. See entry at GRIN .
  6. ↑ Svensk Bot. Tidskr. 24: 133. 1930.
  7. ↑ Pilgerodendron uviferum in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
  8. ↑ Lotte Burkhardt: Directory of eponymous plant names . Extended Edition. Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2018. [1]

literature

  • Aljos Farjon: A monograph of Cupressaceae and Sciadopitys . Royal Botanic Gardens, Kew, 2005, ISBN 1-84246-068-4 .

Web links

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