Callitris oblonga
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Callitris oblonga |
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Callitris oblonga is a species of plant from the family of the cypress family (Cupressaceae). It is native to New South Wales and northern Tasmania.
description
Callitris oblonga grows as an evergreen shrub or small tree that can reach heights of up to 5 meters. The dense branches go upright from the trunk.
The dark green leaves are 4 to 5 millimeters long. The back of the leaves is conspicuously keeled.
The male cones stand individually or in groups of two to five on the branches and are egg-shaped with a length of about 2 millimeters. The egg-shaped female cones stand together in groups, have no or only a short stalk and are 1.2 to 2 inches long and about 1 to 2.4 inches thick. Each cone consists of six, rarely eight, thick cone scales and carries numerous seeds. After ripening, they remain on the branches for a few years before they release the seeds and fall off. The dark brown seeds are about 2 millimeters in size and have two or three wings.
Distribution and location
The disjoint natural range of Callitris oblonga includes the plateaus of north- and south-eastern New South Wales and northeastern Tasmania .
Callitris oblonga grows on sandy soils near rivers. The species often forms mixed stands in which the crown layer of Eucalyptus ovata , in some areas also of Eucalyptus amygdalina or of the rod-shaped eucalyptus ( Eucalyptus viminalis ) and the undergrowth of the silver acacia ( Acacia dealbata ), Bursaria spinosa and Melaleuca gibbosa .
use
Callitris oblonga is planted as an ornamental wood.
Systematics
It was first described as Callitris oblonga in 1826 by Louis Claude Marie Richard and Achille Richard in Commentatio botanica de Conifereis et Cycadeis , Volume 49.
Callitris oblonga is divided into up to three subspecies:
- Callitris oblonga subsp. corangensis K. D. Hill is only known from a single occurrence on the Corrang River near the town of Nerriga in southeastern New South Wales . The cones are 1.4 to 1.8 inches long and 1 to 1.5 inches thick.
- Callitris oblonga subsp. oblonga is the nominate form . It occurs along rivers and streams in northeastern Tasmania. The cones are 1.8 to 2.4 inches long and 1.4 to 2.2 inches thick.
- Callitris oblonga subsp. parva K. D. Hill occurs in the northeastern plateaus of New South Wales near rivers and swamps. The cones are 1.2 to 1.5 inches long and 1 to 1.4 inches thick.
Hazard and protection
Callitris oblonga is classified as "endangered" in the IUCN Red List . It is pointed out, however, that a new review of the hazard is necessary. The range in Tasmania is less than 100 km² and the populations in New South Wales include approximately 12,000 fully grown trees. Some smaller stocks are located within protected areas. Forest fires and the utilization of the areas for arable farming are given as the main risk factors.
swell
- Christopher J. Earle: Callitris oblonga. In: The Gymnosperm Database. www.conifers.org, November 25, 2012, accessed on February 13, 2013 .
- Callitris oblonga. In: Flora of Australia Online. www.anbg.gov.au, accessed on February 13, 2013 (English).
Individual evidence
- ↑ a b c d Christopher J. Earle: Callitris oblonga. In: The Gymnosperm Database. www.conifers.org, November 25, 2012, accessed on February 13, 2013 .
- ↑ a b c d e f g h i Callitris oblonga. In: Flora of Australia Online. www.anbg.gov.au, accessed on February 13, 2013 (English).
- ↑ a b c Callitris oblonga. In: Germplasm Resources Information Network. www.ars-grin.gov, accessed on February 13, 2013 (English).
- ↑ Callitris oblonga at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed February 13, 2013.
- ↑ Callitris oblonga in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Accessed February 13, 2013.
