Hussar button
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Hussar button ( Sanvitalia procumbens ) |
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The Hussars button ( Sanvitalia procumbens ) or the Hussars knobs , commercially sometimes also known as miniature sunflower offered is a plant from the family of the daisy family (Asteraceae).
description
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The hussar button is a prostrate, annual plant that branches heavily at the base. It is hairy with short bristles to rough. The individual rungs are usually between 10 and 40 cm long. Occasionally the plant forms dense mats. The leaves stand on short petioles, the leaf blades are thick, curly haired, broadly lanceolate to ovate or elongated, usually 1 to 3, rarely 5 cm long. The tip of the leaf is rounded or very blunt, the edge of the leaf is entire .
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The flower heads stand individually on short or more or less elongated, bristly flower stalks with a foliage-like bract . The calyx is hemispherical, usually smaller than 1 cm in diameter, the individual bracts are 4 to 5 mm long, pale green, arranged like roof tiles, broadly ovate to oval or almost round, the tip is very blunt or rounded, sometimes spiky, tomentose with dense long white hair lashes. The chaff leaves are relatively firm and long, pointed. The about twelve ray- flowers sit on the achenes , the petal tongue is yellow or orange, finely forked at the tip and about 4 to 9 mm long. The crowns of the disc florets are about 3 mm long, yellow or purple, the ray achenes have three awns, the outer disc awnings are winged or wingless and have one or two short awns, the inner achenes are narrow and roughly tuberous, irregularly triangular to square, ciliate and without awns or with one or two short awns.
The number of chromosomes is 2n = 16.
Occurrence
The main distribution area of the hussar button is Mexico, it is also occasionally found in Guatemala and Costa Rica. The plant grows on dry, stony slopes at heights of 1100 to 1350 meters or appears as a weed in corn fields .
literature
- Dorothy L. Nash and Louis O. Williams (Eds.): Flora of Guatemala - Compositae. Field Museum of History Botanical Series, Volume 24, Part XII, Chicago, USA, 1976.
Individual evidence
- ^ Sanvitalia procumbens at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Sanvitalia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved March 5, 2018.
