Tylecodon

Tylecodon paniculatus in the Richtersveld National Park in the Northern Cape of South Africa

Tylecodon is a genus of flowering plants in the family Crassulaceae ( Crassulaceae ). The botanical name is an anagram of cotyledon, another genus of plants under the Tylecodon species were arranged earlier.

  • 3.1 Literature
  • 3.2 Notes and references

Description

Vegetative characteristics

The species of the genus Tylecodon are perennial, deciduous herbaceous plants or shrubs that usually have a caudiforme basis. Your growth form varies from zwergigen Geophyten to thick-stemmed, hired trees, which can reach heights of growth of up to 2.5 meters. The usually short, succulent shoots are ascending. Sometimes they are climbing, brittle or strong and rarely woody, but sometimes also with perennial, woody, blunt cusps ( Phyllopodien ). The bark can be smooth or rough and peels off in strips or flakes off. The spiral, usually crowded at the shoot tip leaves are flat or terete, where they are then often grooved on the top. They dry up during the early summer and then fall often completely.

The roots are fibrous or succulent.

Inflorescences and flowers

The inflorescence is a terminal Thyrse consisting of one to several Monochasien, each one have to many flowers. The flowers are 5- merous, almost always radial symmetry ( actinomorphic ) and obdiplostemon. The much shorter sepals are more or less pressed against the tubed to trichterige corolla. The petals are fused to three quarters or more together. Her white, greenish, yellowish or mauve (rarely reddish ) tip are spread and later often bent back.

The stamens of the ten stamens are fused with the lower part of the corolla tube. The five carpels are free. The style is upright and has basal Nektarschüppchen.

The flowers of the species grandiflorus Tylecodon and Tylecodon paniculatus be, all other species pollinated by sunbirds by insects.

Fruit and seeds

The upright fruits are capsules that only tear at the top. They contain very small, ellipsoidal and ribbed seeds that are spread by the wind.

Systematics and distribution

The genus Tylecodon is spread in the winter rainfall areas of Namibia and South Africa. The main distribution areas are the Richtersveld and the Knersvlakte. The very closely with cotyledon and Adromischus related genus was erected in 1978 by Hellmut Tölken Richard ( b. 1939 ).

After Ernst Jacobus van Jaarsveld ( born 1953 ), the genus Tylecodon includes the following types:

  • Tylecodon albiflorus
  • Tylecodon atropurpureus
  • Tylecodon aurusbergensis
  • Tylecodon Bavarian
  • Tylecodon bleckiae
  • Tylecodon bodleyae
  • Tylecodon buchholzianus Tylecodon buchholzianus var buchholzianus
  • Tylecodon buchholzianus var fasciculatus
  • Tylecodon reticulatus subsp. reticulatus
  • Tylecodon reticulatus subsp. phyllopodium
  • Tylecodon sulphureus sulphureus var
  • Tylecodon sulphureus var armianus
  • Tylecodon wallichii subsp. wallichii
  • Tylecodon wallichii subsp. ecklonianus

Evidence

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