Aloe volkensii

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Aloe volkensii
Aloiampelos ciliaris-IMG 6195.jpg

Aloe volkensii

Systematics
Monocots
Order : Asparagales (Asparagales)
Family : Grass trees (Xanthorrhoeaceae)
Subfamily : Affodilla family (Asphodeloideae)
Genre : Aloes ( aloe )
Type : Aloe volkensii
Scientific name
Aloe volkensii
Engl.

Aloe volkensii is a species of the genus Aloes in the subfamily of the Affodil family (Asphodeloideae). The specific epithet volkensii honors the German botanist Georg Ludwig August Volkens .

description

Vegetative characteristics

Aloe volkensii grows in a stem-forming manner, is simple or branching above the base. The upright trunks reach a length of up to 9 meters and a diameter of 30 centimeters. The lanceolate, narrowed leaves form dense rosettes . Dead leaves are persistent on the stems. The glauk- green to olive-green leaf blade is up to 100 centimeters long and 10 centimeters wide. The leaf surface is smooth. The brown-tipped, piercing teeth on the leaf margin are 4 millimeters long and 8 to 15 millimeters apart. The leaf sap is dry yellow.

Inflorescences and flowers

The inflorescence consists of about ten branches and reaches a length of 70 to 85 centimeters. The dense, almost heady, cylindrical grapes are 8 to 12 inches long and 8 to 9 inches wide. The egg-shaped-pointed bracts have a length of about 5 millimeters and are just as wide. The reddish orange to light scarlet flowers are on approximately 15 millimeter long peduncles . The flowers are about 35 millimeters long and rounded at their base. At the level of the ovary , the flowers have a diameter of 7 to 8 millimeters. Above this they are very slightly narrowed and finally slightly expanded towards the mouth. Your outer tepals are not fused together over a length of 14 to 16 millimeters. The stamens and the style protrude 5 to 6 millimeters from the flower.

Systematics and distribution

Aloe volkensii is common in Kenya , Tanzania , Uganda and Rwanda .

The first description by Adolf Engler was published in 1895. The following subspecies are distinguished:

  • Aloe volkensii subsp. volkensii
  • Aloe volkensii subsp. multicaulis S.Carter & LENewton

Aloe volkensii subsp. volkensii
The subspecies is distributed in the south-east of Kenya and in the north-east of Tanzania on steep rocky slopes, often in dense, riverside forest areas at heights of 10 to 1800 meters. A synonym for Aloe volkensii subsp. volkensii is Aloe stuhlmannii Baker (1898).

Aloe volkensii subsp. multicaulis
The differences to Aloe volkensii subsp. volkensii are: The subspecies branches out from the base with three or more main shoots. The teeth on the edge of the leaf are about 15 millimeters apart. The flowers are brick red and 30 to 35 millimeters long.

The first description of this subspecies by Susan Carter and Leonard Eric Newton was published in 1994. Aloe volkensii subsp. multicaulis is distributed in the southwest of Kenya, in the northwest of Tanzania, in Rwanda and in the southwest of Uganda in rocky bushland, often near rivers at altitudes of 1150 to 1920 meters.

Danger

Aloe volkensii is in the Red List of Threatened Species of IUCN as " Least Concern (LC) ", d. H. classified as not endangered in nature.

proof

literature

Individual evidence

  1. ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 254.
  2. ↑ Adolf Engler (Ed.): Plant world of East Africa and the neighboring areas . Part C, 1895, p. 141 ( online ).
  3. ^ Flora of Tropical East Africa. Aloaceae . 1994, p. 56.
  4. ↑ Aloe volkensii in the endangered Red List species the IUCN 2012. Posted by: the Eastern Arc Mountains and Coastal Forests CEPF Plant Assessment Project Participants, 2009. Accessed October 24, 2012th

Web links

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