Abutilon julianae
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Abutilon julianae is a species of the genus Abutilon within the family of the Malvaceae (Malvaceae). This rare species is only found on Norfolk Island and Phillip Island . It was long considered extinct on Norfolk Island, but a successful reintroduction program is currently underway there.
description
Vegetative characteristics
Abutilon julianae grows as a subshrub and reaches heights of 1 meter or more. The bark of the young trunks is densely covered with tightly fitting soft star hairs ( trichomes ). The alternate leaves are divided into a petiole and a leaf blade. The petiole is 2 to 8 cm long. The simple leaf blade is egg-shaped with a heart-shaped blade base at a length of 3 to 9 cm and a width of 2.5 to 7 cm. The edge of the spread is sawed slightly irregularly. The underside of the leaf is densely covered with tightly fitting star hairs and the upper side of the leaf becomes almost bare over time.
Generative characteristics
The flowers are solitary in the leaf axils. The flower stalks are 5 to 15 mm long. The hermaphrodite flowers are radially symmetrical and five-fold. There is no secondary chalice. The five sepals, which are densely covered with star hair, are fused together with a total length of 5 to 10 mm for about half their length. The yellow petals are shorter than the sepals. In the subfamily Malvoideae, the many stamens have grown together to form a tube surrounding the pistil , the so-called Columna . It is about twice as long as the chalice and protrudes a long way.
The split fruit breaks up into 20 finely hairy, three-seeded partial fruits.
habitat
Abutilon julianae grows on steep slopes and cliffs as well as on open grasslands.
Endangerment status
Abutilon julianae is rated "Critically Endangered" by the Australian government. This species was last sighted on Norfolk Island in 1913. Apparently it was exterminated there by feral rabbits. When a rabbit elimination program was carried out on Philipp Island in the 1980s, Abutilon julianae was rediscovered there in 1985 . Most of the specimens were found in the inaccessible south of the island. In 1988 there were three main areas, one with about 100 plant specimens, another with 18 individuals and a third with about 10 specimens. Today the species is scattered all over the western half and along the north and south coasts of Phillip Island. Norfolk Island National Park is currently undergoing a Norfolk Island reintroduction program with an increasing growth rate.
Taxonomy
The first description of Abutilon julianae was made in 1833 by Stephan Endlicher in Prodromus Florae Norfolkicae 75th, S. On the herbarium of the type specimen is "Crescit in insula Norfolk, mense Januario florens. (Ferd. Bauer). ".
swell
- Data sheet at Flora of Australia Online with data from PS Green in AJG Wilson (editor) Flora of Australia , Volume 49, 1994, pp. 113-114, Figure 38. (Section Description)
- Entry at Australian Plant Name Index = APNI. (Taxonomy section)
literature
- Director of National Parks 2010: Norfolk Island Region Threatened Species Recovery Plan . Department of the Environment, Water, Heritage and the Arts, Canberra, ISBN 978-0-646-53763-4 , p. 76.