Aeonium arboreum

Aeonium arboreum
Aeonium arboreum
Systematics
Order : Saxifragales (Saxifragales) Family : Thick-leaf family (Crassulaceae) Subfamily : Sempervivoideae Tribe : Aeonieae Genre : Aeonium Type : Aeonium arboreum
Scientific name
Aeonium arboreum
( L. ) Webb & Berthel.

Aeonium arboreum is a species of the genus Aeonium in the thick-leaf family(Crassulaceae). It is endemic to the Canary Islands and its varieties are used as ornamental plants .

description

Aeonium arboreum grows as a slightly branched subshrub and reaches heights of up to 2 meters. The more or less upright or ascending, smooth, not network-like patterned stem axes have a diameter of 1 to 3 centimeters.

Their leaves stand together in flattened rosettes with a diameter of 10 to 25 centimeters at the end of the stem axes. Young leaves are tightly pressed together. The obovate to lanceolate leaf blade is pointed towards its tip and wedge-shaped at the base. It is 5 to 15 inches long, 1 to 4.5 inches wide and 1.5 to 3 millimeters thick. The green, mostly purple- colored , shiny leaf surface is almost bare. The edge of the sheet is covered with curved eyelashes.

The conical to egg-shaped inflorescence has a length of 10 to 25 centimeters and a diameter of 10 to 15 centimeters. The inflorescence stalk is 5 to 20 inches long. The nine- to eleven-fold flowers sit on a 2 to 12 millimeter long, slightly downy-haired flower stalk . Their sepals are also weakly downy-haired. The yellow, narrowly elongated to lanceolate, pointed petals are 5 to 7 millimeters long and 1.5 to 2 millimeters wide. The stamens are bare.

The chromosome number is at aeonium arboreum var. Holochrysum 2n = 36.

Systematics and distribution

inflorescence

Aeonium arboreum 'Atropurpureum'

Illustration of the Aeonium arboreum called ΑΕΙΖΩΝ ΤΟ ΜΕΓΑ (Aeizon to Mega) in the Vienna Dioscurides

Aeonium arboreum is common in the Canary Islands at altitudes between 200 and 1500 meters. In the Mediterranean area the species occurs as a neophyte .

It was first described as Sempervivum arboreum in 1753 by Carl von Linné in Species Plantarum . Philip Barker Webb and Sabin Berthelot put the species in 1840 in the genus Aeonium, which they newly established .

A distinction is made between the following varieties :

• Aeonium arboreum var. Arboreum
• Aeonium arboreum var. Holochrysum H.Y.Liu : The inflorescence is ovoid or conical and 7 to 30 centimeters long. The peduncle is almost bare, the sepals bare and the petals yellow.
• Aeonium arboreum var. Rubrolineatum (Svent.) HYLiu : The inflorescence is hemispherical to ovoid and 8 to 15 centimeters long. The flower stalk is almost bare, the sepals bare and the petals rather pale yellow and mostly striped with reddish stripes.

Numerous cultivars are known, for example:

• Aeonium arboreum 'Zwartkop'
• Aeonium arboreum f. foliis purpureis
• Aeonium arboreum f. foliis variegatis
• Aeonium arboreum var. Albivariegatum
• Aeonium arboreum var. Atropurpureum
• Aeonium arboreum var. Luteovariegatum
• Aeonium arboreum var. Variegatum

proof

literature

• Reto Nyffeler: Aeonium . In: Urs Eggli (Ed.): Succulents Lexicon Volume 4 Crassulaceae (thick-leaf plants) . Eugen Ulmer Verlag, Stuttgart 2003, ISBN 3-8001-3998-7 , p. 13.

Individual evidence

1. ^ Aeonium arboreum at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
2. ↑ Carl von Linné: Species Plantarum . 1st edition 1753, Volume 1, p. 464 ( online ).
3. ↑ Philip Barker Webb, Sabin Berthelot: Histoire naturelle des îles Canaries . Volume 3, Part 2, Section 1, 1840, p. 185 ( online ).

Web links

Commons : Aeonium arboreum  - collection of images, videos and audio files