Silky-haired schizogyns

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Silky-haired schizogyns
Silky-haired Schizogyne (Schizogyne sericea)

Silky-haired Schizogyne ( Schizogyne sericea )

Systematics
Order : Astern-like (Asterales)
Family : Daisy family (Asteraceae)
Subfamily : Asteroideae
Tribe : Inuleae
Genre : Schizogyne
Type : Silky-haired schizogyns
Scientific name
Schizogyne sericea
( L. f. ) DC.

The silk-haired Schizogyne ( Schizogyne sericea ) is a plant of the genus Schizogyne within the family of Compositae (Asteraceae). It occurs in Macaronesia .

description

Deciduous leaves and whole inflorescences with flower heads
Flower heads in detail, for example the two branches of the style of the flower are recognizable

Vegetative characteristics

The silky-haired Schizogyne grows as a shrub and reaches heights of 30 to 100 centimeters. The aboveground parts of the plant are silky-white and hairy. The fleshy, blunt leaves are linear with a length of 3 to 5 centimeters.

Generative characteristics

The flowering period is between February and June. A few cup-shaped partial inflorescences stand together in dense, cerebral overall inflorescences . The flower heads have a diameter of 5 to 6 millimeters. There are several rows of yellowish, membranous bracts . The flower heads usually only contain tubular flowers ; Ray florets are absent or very short. The flowers are yellow. The scar is deep in two columns.

The hairy achenes have a row of bristles.

Chromosome number

The number of chromosomes is 2n = 18.

Occurrence

The silky-haired Schizogyne is a species endemic to Macaronesia . It occurs on all Canary Islands as well as on the Ilhas Selvagens archipelago belonging to Madeira . Their occurrence on Fuerteventura is questionable. It grows in the succulent bush near the coast . In southern Gran Canaria it is replaced by the Bald Schizogyne ( Schizogyne glaberrima DC. ).

Taxonomy

The first publication took place in 1772 under the name ( Basionym ) Chrysocoma sericea by Carl von Linné . The new combination to Schizogyne sericea (L. fil.) DC. was published in 1836 by Augustin-Pyrame de Candolle . Other synonyms for Schizogyne sericea (L. fil.) DC. are: Conyza sericea Aiton , Inula schizogyne Masf.

The generic name Schizogyne is derived from the Greek word σχίζειν - schizein for split and refers to the deeply split scar. The specific epithet sericea comes from the Latin word sericeus and means silky.

literature

  • Peter Schönfelder, Ingrid Schönfelder: The Kosmos-Canary Islands flora. Over 1000 species and 60 tropical ornamental trees (=  Kosmos nature guide ). 3. Edition. Franckh-Kosmos, Stuttgart 2012, ISBN 978-3-440-12607-3 .

Individual evidence

  1. ^ A b c d e f g Adalbert Hohenester, Walter Welss: Excursion flora for the Canary Islands. With views of the whole of Macaronesia . Eugen Ulmer, Stuttgart (Hohenheim) 1993, ISBN 3-8001-3466-7 , pp. 254 ( PDF file; 23.2 MB ).
  2. ↑ a b c Vilhelm Dalgaard: Chromosome studies of flowering plants from Macaronesia. In: Anales del Jardin botánico de Madrid , Volume 43, Issue 1, 1986, pp. 83-111. PDF.
  3. ↑ a b Werner Greuter : Compositae (pro parte majore) In: Werner Greuter, Eckhard von Raab-Straube (ed.): Compositae. : Conyza sericea data sheet at Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Berlin 2006–2009.

Web links

Commons : Silky-haired Schizogyne ( Schizogyne sericea )  - Collection of images, videos and audio files

Schizogyne sericea in the Flora Vascular de Canarias .