Actinostrobus pyramidalis

Actinostrobus pyramidalis is a species of the family of the cypress family ( Cupressaceae ). It is native in the southwestern part of Western Australia.

Description

Actinostrobus pyramidalis grows as evergreen, nearly conical shaped shrub or tree that can reach heights of growth of up to 8 meters. The dense branches walking 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, which are 7-8 mm long. Rarely do you find these sheets even on older trees. Mature trees have dark green scale leaves which are ovate shaped with a length of up to 1.2 centimeters. They are easily keeled and its tip is pointed. Seedlings have two blue-green, acute to rounded tapered cotyledons ( cotyledons ) which are 9-15 mm long and 1.5 to 2 millimeters wide.

The male cones are cylindrically shaped 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 bear two to four Mikrosporophylle. The female cones are on a short stalk and are at a diameter of 1.2 to 1.5 centimeters shaped globose to ovoid. At maturity towards them are gray -brown. Each pin consists of six blunt or pointed cone scales that back bend to maturity easy and open the spigot so to release the seeds. The light brown to yellow- brown, resinous seeds are 0.5 to 0.7 centimeters long and 1.5 to 1.9 millimeters wide wings.

The chromosome number is 2n = 22

Distribution and location

The natural range of Actinostrobus pyramidalis is located in Western Australia. It extends from there Watheroo in the north to Albany City in the south.

Actinostrobus pyramidalis grows mainly in the bush and on sandy plains.

System

The first description was in 1845 as Actinostrobus pyramidalis by Friedrich Anton Wilhelm Miquel in Plantae Preissianae, Volume 1, page 644 synonyms for Actinostrobus pyramidalis Miq. are Callitris actinostrobus F. Muell. and Frenela actinostrobus (F. Muell. ) F. Muell ..

Threats and conservation

Actinostrobus pyramidalis is classified as "low risk" in the IUCN Red List. It is noted, however, that a re-examination of risk is necessary.

Swell

• Christopher J. Earle: Actinostrobus pyramidalis. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed January 6, 2013 ( English).