Senecio rowleyanus

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Senecio rowleyanus
Pea on ribbon (Senecio rowleyanus) (31772262164) .jpg

Senecio rowleyanus

Systematics
Order : Astern-like (Asterales)
Family : Daisy family (Asteraceae)
Genre : Field herbs ( Senecio )
Type : Senecio rowleyanus
Scientific name
Senecio rowleyanus
H. Jacobsen

Senecio rowleyanus , also known as pea plant , peas on a ribbon or string of pearls , is a species of ragweed (Senecio) within the sunflower family (Asteraceae). It is used as an ornamental plant.

description

alternative description
Flower head with a few flowers and two-branched style

Vegetative characteristics

In Senecio rowleyanus is a low-growing perennial herbaceous plant . The lying, green shoot axes take root and form dense mats. They are thin and weak, about 1 millimeter in diameter.

The alternate leaves are relatively short stalked (less than 0.5 millimeters) or sessile. The succulent leaf blades are almost perfectly spherical with a diameter of 5 to 8 millimeters, with a small translucent strip that runs lengthways to the tip and is up to 1 millimeter wide.

Generative characteristics

The stem of the flower head is 3 to 4 centimeters long with one to two isolated white bracts , three to four more are located directly under the flower head . The cylindrical involucre has a length of 7 to 8 millimeters and a diameter of about 4 millimeters and consists of ten elongated bracts . The bracts are fused to one another over three quarters of their length, tapering to a point and have deep purple edges. The flower heads each contain around 20 flowers . The flowers are 3.5 millimeters in diameter and smell of cinnamon . The petals are fused to form a tube. The white petals have strongly recurved crown teeth. The anthers are deep purple, the pollen yellow. The scars are white on top and purple on the underside with slightly enlarged papillary ends.

There are achenes with a pappus formed.

The number of chromosomes is 2n = 20.

Distribution and systematics

Senecio rowleyanus is distributed in South Africa , only in the provinces of Eastern Cape and Western Cape .

The first description of Senecio rowleyanus was in 1968 by Hermann Jacobsen in National Cactus and Succulent Journal , Volume 23, Issue 2, pages 30-31. The epithet rowleyanus honors the British succulent specialist Gordon Douglas Rowley . The first description was based on cultivated plants of unknown origin, since it was not possible to find the place of origin of the species. Later it was of John Jacob Lavranos in Karoolandschaft near the town of Kleinpoort (Eastern Cape) rediscovered. Synonyms for Senecio rowleyanus H.Jacobsen are Kleinia rowleyana (H.Jacobsen) G.Kunkel and Curio rowleyanus (H.Jacobsen) PVHeath .

Individual evidence

  1. ↑ a b c d e f Hermann Jacobsen: STRING-OF-BEADS SENECIO: SENECIO ROWLEYANUS Jacobs nov. spec. In: The National Cactus and Succulent Journal . tape 23 , no. 2 , June 1968, p. 30-31 , JSTOR : 42788818 .
  2. ^ DG Rowley: Senecio . In: Urs Eggli (Hrsg.): Succulent lexicon . tape 2 : Dicotyledonous plants (dicotyledons) . Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , p. 39 .
  3. ^ WG Welman: Senecio . In: G. Germishuizen, NL Meye (Ed.): Plants of southern Africa: an annotated checklist (=  Strelitzia . No. 14 ). National Botanical Institute, Pretoria 2003, p. 291 ( uwc.ac.za [PDF; 6.4 MB ]).
  4. ↑ Sue Haffner: SENECIO rowleyanus OR STRING OF BEADS. (PDF) Fresno Cactus and Succulent Society, accessed December 1, 2018 .

Web links

Commons : Senecio rowleyanus  - collection of images, videos and audio files