Thyme-flowered dragon head
| Thyme-flowered dragon head | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thyme-flowered scorpionfish ( Dracocephalum thymiflorum ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Dracocephalum thymiflorum | ||||||||||||
| L. |
The Thymianblütige scorpionfish ( Dracocephalum thymiflorum ) is a flowering plant in the family of the mint (Lamiaceae).
description
Appearance and foliage leaf
The thyme-flowered scorpionfish grows as an annual , herbaceous plant that reaches heights of up to 60 centimeters. The upright stems are hairy with little downy hair.
The oppositely arranged leaves grow both basal and stem leaves. The petioles of the basal and lower leaves are longer than the leaf blade ; on the other hand, the stalks of the upper leaves are shorter than the leaf blade. The simple , bare leaf blades of the basal and lower leaves are ovate to ovate and lanceolate with a length of 10 to 35 millimeters and a width of 7 to 20 millimeters. The base of the spread is heart-shaped and the edge of the spread is sawn-toothed or sawn. The leaf blades of the upper stalk leaves are egg-shaped and wedge-shaped at the base of the blades.
Inflorescence and flower
The annual inflorescence consists of pseudo whorls that are relatively far apart , each containing six to twelve flowers and elliptical, pointed and entire bracts .
The hermaphrodite flowers are zygomorph double perianth (perianth). The five sepals are fused into an approximately tubular to bell-shaped calyx. The five purple-blue petals form the 7 to 9 millimeter long, two-lipped crown that only slightly protrudes from the calyx. The upper lip has two lobes ; the lower lip consists of three lobes, the middle of which is edged and larger than the lateral. The two rear of the four stamens are longer than the two front. The tip of the stylus is divided equally into two parts.
Chromosome number
The number of chromosomes is 2n = about 14, 20.
Occurrence
The thyme-flowered scorpionfish is native to the Baltic States and northern Russia southwards to Bulgaria , Ukraine and the Caucasus region . It was naturalized in the Canary Islands , France , Great Britain , Poland , Scandinavian countries , Romania and the Crimean peninsula . It was also introduced in North America and is now common in the northern United States and Canada .
The thyme-flowered scorpionfish populates more or less dry and open habitats.
Systematics
The first publication of Dracocephalum thymiflorum was in 1753 by Carl von Linné in Species Plantarum , Volume 2, page 596. Synonyms for Dracocephalum thymiflorum L. are Moldavica thymiflora ( L. ) Rydb. , Ruyschiana thymifolia House , nom. superfl., Dracocephalum thymifolium Houtt. and Zornia parviflora Moench .
swell
literature
- VH Heywood: Dracocephalum thymiflorum In: TG Tutin, VH Heywood, NA Burges, DM Moore, DH Valentine, SM Walters, DA Webb (eds.): Flora Europaea . Volume 3: Diapensiaceae to Myoporaceae . Cambridge University Press, Cambridge 1972, ISBN 0-521-08489-X , pp. 161 (English, limited preview in the Google book search - description of Dracocephalum and Dracocephalum thymiflorum , from the unmodified reprint from 2010 ( ISBN 978-0-521-15368-3 )).
Individual evidence
- ↑ Dracocephalum thymiflorum = thyme-flowered dragon head. In: Nomen.at - animals and plants Dictionary of Common (Vernacular) Names. Retrieved January 21, 2012 (English, search engine for national-language names).
- ↑ a b Dracocephalum thymiflorum. In: Tropicos. Missouri Botanical Garden, accessed January 23, 2012 .
- ↑ a b Rafaël Govaerts (Ed.): Dracocephalum thymiflorum. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 24, 2020.
- ↑ Plants Profile: Dracocephalum thymiflorum L. thymeleaf dragonhead. In: Plants Database. NRCS Natural Resources Concervation Service - USDA United States Department of Agriculture, accessed January 21, 2012 .
- ↑ Carl von Linné: Species Plantarum . tape 2 . Stockholm 1753, p. 596 ( Online - Dracocephalum thymiflorum first publication scanned at Biodiversity Heritage Library ).
Web links
- Dracocephalum thymiflorum (Dragonhead). In: Colin's Virtual Herbarium. Colin Ladyka, accessed on January 21, 2012 (English, images of the plant and individual components from the Canadian province of Saskatchewan).
- Distribution in the northern hemisphere
