Actinostrobus pyramidalis
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Actinostrobus pyramidalis |
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Callitris pyramidalis is a plant from the family of the cypress family (Cupressaceae). It isnative tothe southwestern part of Western Australia .
description
Actinostrobus pyramidalis grows as an evergreen , almost conically shaped shrub or tree that can reach heights of up to 8 meters. The dense branches go upright from the trunk. The branches branch out into long, straight and narrow branches. The brown bark is smooth.
Young trees have blue-green leaves that are 7 to 8 millimeters long. These leaves are rarely found on older trees. Older trees have dark green scale leaves which are egg-shaped with a length of up to 1.2 centimeters. They are slightly keeled and their leaf tips are pointed. Seedlings have two blue-green, pointed to rounded cotyledons ( cotyledons ) which are 9 to 15 millimeters long and 1.5 to 2 millimeters wide.
The male cones are cylindrical in shape with a length of 3 to 5 millimeters and a thickness of 1.5 to 2 millimeters. They consist of 16 to 18 egg-shaped cone scales and carry two to four microsporophylls . The female cones stand on a short stalk and are spherical to egg-shaped with a diameter of 1.2 to 1.5 centimeters. When they are ripe they are gray-brown in color. Each cone consists of six blunt or tapering cone scales which bend back slightly to maturity and open the cone to release the seeds. The light brown to yellow-brown, resinous seeds are 0.5 to 0.7 centimeters long and have 1.5 to 1.9 millimeters large wings.
The number of chromosomes is 2n = 22.
Distribution and location
The natural range of Actinostrobus pyramidalis is in Western Australia . It extends there from Watheroo in the north to Albany City in the south.
Actinostrobus pyramidalis grows mainly in bushland and on sandy plains.
Systematics
It was first described as Actinostrobus pyramidalis in 1845 by Friedrich Anton Wilhelm Miquel in Plantae Preissianae , Volume 1, page 644. Synonyms for Actinostrobus pyramidalis Miq. are Callitris actinostrobus F. Muell. , Callitris pyramidalis (Miq.) JEPiggin & JJBruhl and Frenela actinostrobus (F. Muell.) F. Muell.
Hazard and protection
Actinostrobus pyramidalis is classified as "low risk" in the IUCN Red List . It is pointed out, however, that a new review of the hazard is necessary.
swell
- Christopher J. Earle: Actinostrobus pyramidalis. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed January 6, 2013 .
Individual evidence
- ↑ a b c d e f Christopher J. Earle: Actinostrobus pyramidalis. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed January 6, 2013 .
- ^ Actinostrobus pyramidalis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 6, 2013.
- ^ Actinostrobus pyramidalis. In: The Plant List. www.theplantlist.org, accessed on January 6, 2013 .
- ↑ Rafaël Govaerts (ed.): Actinostrobus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 19, 2019.
- ↑ Actinostrobus pyramidalis in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Retrieved on January 6, 2013.