Allocasuarina torulosa
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Allocasuarina torulosa |
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| Allocasuarina torulosa | ||||||||||||
| ( Aiton ) LASJohnson |
Allocasuarina torulosa is a species ofthe casuarina family (Casuarinaceae). It isnative toeastern Australia and is called Forest Oak there.
description
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Allocasuarina torulosa grows as an evergreen tree that can reach heights of growth of 5 to 25 meters. The rough and cork-like trunk bark is gray to dark brown in color.
The hanging twigs are up to 14 centimeters long and consist of cylindrical segments that are 5 to 6 millimeters long and 0.4 to 0.5 millimeters thick in young twigs. The twigs have hairiness in the furrows. The twigs take over the function of the leaves and are also known as phyllodes . On each segment of the branches there are four to five reduced, tooth-like to slightly rounded leaves that are 0.3 to 0.8 millimeters long.
Allocasuarina torulosa is usually dioecious, separate sexes ( diocesan ). During the flowering period, which extends from autumn to winter, the male trees appear yellow because of the numerous pollen . The male inflorescences are spike-shaped with a length of 0.5 to 3 centimeters and have seven to twelve whorls per centimeter. The stamens are 0.5 to 0.6 millimeters long. The female trees form cone-like fruits that stand on a 0.8 to 3 centimeter long stem and are round, cylindrical to barrel-shaped with a length of 1.5 to 4 centimeters and a thickness of 1.2 to 2.5 centimeters. Their warty surface can be densely hairy. As seeds medium to dark brown colored wing nuts are formed that are 0.7 to 1 centimeter long.
The number of chromosomes is 2n = 24.
Occurrence
The natural range of Allocasuarina torulosa is in eastern Australia. There the distribution area extends from the McIlwraith Range in northern Queensland south to Macquarie Pass and the Jenolan Caves in New South Wales . Allocasuarina torulosa occurs from the coast to about 200 kilometers inland.
Allocasuarina torulosa grows in coastal areas on hills and plains, mostly as undergrowth in open forests. It occurs on a variety of different types of soil , but it prefers nutrient-rich soils than Allocasuarina littoralis .
Taxonomy
It was first described as Casuarina torulosa in 1789 by William Aiton in Hortus Kewensis; or, a catalog ... , volume 3, page 320. The new combination to Allocasuarina torulosa (Aiton) LASJohnson was published in 1982 by Lawrence Alexander Sidney Johnson in Journal of the Adelaide Botanic Gardens , volume 6, number 1, page 79. Other synonyms for Allocasuarina torulosa (Aiton) LASJohnson are Casuarina ericoides hort. ex gentil nom. inval., Casuarina lugubris Salisb. , Casuarina lugubris K.D. Koenig & Sims nom. illeg., Casuarina tenuissima Sieber ex Spreng. and Casuarina tenuissima Sieber ex Spreng. The specific epithet torulosa is derived from the Latin words torulus for " outgrowth-like " and - osus for "abundant" and refers to the wart-like appearance of the fruit segments.
use
Allocasuarina torulosa is suitable as a street and ornamental tree due to its low susceptibility to pathogens and its resistance to drought. During the colonization of Australia, the wood was used to make roof shingles .
swell
- Allocasuarina torulosa. In: Flora of Australia Online. www.anbg.gov.au, accessed on June 20, 2014 (English).
Individual evidence
- ↑ a b data sheet - Allocasuarina torulosa at Australian Plant Name Index = APNI
- ↑ a b c d e f Allocasuarina torulosa. In: Flora of Australia Online. www.anbg.gov.au, accessed on June 20, 2014 (English).
- ↑ a b c d e f Allocasuarina torulosa - Forest Oak. www.hornsby.nsw.gov.au, accessed June 20, 2014 (English).
- ↑ Allocasuarina torulosa at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed June 20, 2014.
