Tylecodon reticulatus
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Tylecodon reticulatus |
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| ( Lf ) Toelken |
Tylecodon reticulatus is a species of the genus Tylecodon in the family of thick-leaf plants (Crassulaceae).
description
Plants of the species Tylecodon reticulatus have a very different appearance. They grow at the base from a thick, stocky trunk that can be 3 to 38 centimeters high. The little branched crown is round and reaches about 30 centimeters in diameter. On the main trunk, which is up to 6 centimeters thick, the bark peels off with brown stripes. The younger, ascending and gray-green shoots reach 8 millimeters in diameter. The leaves, which are crowded at the tips of the shoots, have different shapes and are 5 to 40 millimeters long and 3 to 10 millimeters wide. They are flat and bald or covered with glandular hair. The egg-shaped leaf blade is linear-lanceolate to linearly inverted-lanceolate and has a bluish tinge. The leaf base is wedge-shaped and the blunt tip has a reddish tip.
The inflorescence is formed by thyrsen , which are up to 7 centimeters long and in diameter. They carry many dichasias , which in turn end in two to six spread out to upright individual flowers. The dried up flowers remain on the plant and form a dense, reticulated crown over the leaves and shoots. The flower stalk becomes 6 to 8 millimeters long. The glandular-downy sepals are lanceolate to triangular in shape and are 2 to 4 millimeters long. After flowering, they remain in a star shape on the flower stalks when dry. The tubular, sometimes urn-shaped corolla is yellowish green in color and tinted brown. It becomes 6 to 8 millimeters long and 2.5 millimeters in diameter. It is sparsely hairy on the outside and inside, as well as on the tips. The extended and later bent back tips are 2 to 3 millimeters long.
Systematics and distribution
Tylecodon reticulatus is common in Namibia and South Africa. It was first described in 1782 as a cotyledon reticulata by Carl von Linné's son . 1978 Helmut Richard Tölken put the species in the genus Tylecodon .
There are two subspecies:
- Tylecodon reticulatus subsp. phyllopodium toelken ; highly variable with some local forms, leaves bearing shoots thin, 4 somewhat less dense and more compact than that of the to 8 millimeters in diameter, the inflorescence is ancestral species formed
- Tylecodon reticulatus subsp. reticulatus
Synonyms are Cotyledon dichotoma Haw. and Cotyledon parvula Burch.
literature
- E. van Jaarsveld: Tylecodon . In: Urs Eggli (Ed.): Sukkulenten-Lexikon Volume 4 Crassulaceae (Dickblattgewächse) Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , p. 377.
Individual evidence
- ↑ Supplementum Plantarum Systematis Vegetabilium . Pp. 242, 1782 online
- ^ Helmut Richard Tölken: New taxa and new combinations in Cotyledon and allied genera . In: Bothalia . Volume 12, Issue 3, p. 380, 1978 ( PDF ).
