Trifolium sect. Chronosemium

Trifolium sect. Chronosemium
	Brown clover ( Trifolium badium ) - type species of the section
Systematics
Order :	Fabales (Fabales)
Family :	Legumes (Fabaceae)
Subfamily :	Butterflies (Faboideae)
Tribe :	Trifolieae
Genre :	Clover ( trifolium )
Section :	Trifolium sect. Chronosemium
Scientific name
	Trifolium sect. Chronosemium
	Ser.

Trifolium sect. Chronosemium is a section in the genus clover ( trifolium ). With 17 species in America, it is the fourth largest section of the genus. The species are divided into five series. The main hallmarks of the section are the eye-catching two-lipped calyx, the persistent crown with a spoon-shaped or boat-shaped flag and the solitary fruits.

description

The species of the Chronosemium section are annual , herbaceous plants . The inflorescences are multi-flowered and cape-spherical to ovate. They are rarely bloomed and panicle-like . The single flowers are short stalked. The flower stalks bend when the fruit ripens.

Agraria series : Gold clover ( Trifolium aureum )

Bracts are present and tiny or completely absent. The calyx is often bell-shaped and five-nerved. The calyx tube is open and bare. The calyx teeth are unequal, the two posterior ones are significantly shorter than the three anterior ones, and give the calyx a two-lipped appearance.

The petals are yellow, purple or pink, but never white. They are retained when the fruit ripens, bend over and dry up. The flag is clearly spoon-shaped or boat-shaped.

The legume is stalked or sessile and has one or two seeds. It is hidden behind the remaining crown.

distribution

The species of the Chronosemium section are found in Eurasia, mainly on the Mediterranean. Neophytic occurrences of individual species can also be found in Africa and North America.

Systematics

The type species of the section is the brown clover ( Trifolium badium ). A synonym at the genus level is Chrysaspis Desv. The types of the Chronosemium section and their assignment according to Michael Zohary and David Heller are:

Internal systematics and types of the Chronosemium section

Badia series : Moor clover ( Trifolium spadiceum )

Agraria series : Field clover ( Trifolium campestre )

Filiformia series : thread clover ( Trifolium dubium ) - inflorescence

Section Chronosemium Ser.
- Series Stipata Zoh.
  - Trifolium sintenisii Freyn
- Comosa
  Gib
  series . et Belli
  - Trifolium billardieri Spreng.
  - Trifolium boissieri cast.
  - Trifolium brutium Ten.
  - Trifolium grandiflorum Schreb.
  - Trifolium philistaeum Zoh.

swell

literature

Michael Zohary, David Heller: The Genus Trifolium . The Israel Academy of Sciences and Humanities , Jerusalem 1984, ISBN 965-208-056-X , pp. 532 ff .

Individual evidence

^ Entry for Chrysaspis in Tropicos .
↑ Werner Greuter, Regina Pleger, Thomas Raus: The vascular flora of the Karpathos island group (Dodecanesos, Greece). A preliminary checklist. In: Willdenowia. Volume 13, No. 1, pp. 43-78, JSTOR 3995980 (first description on p. 61).
^ Niels B. Böhling, Werner Greuter, Thomas Raus: Trifolium phitosianum (Leguminosae), a new annual clover species from Greece. In: Botanika Chronika. Volume 13, 2000, pp. 37-44 (first description on p. 39).

[Tropicos-Chrysaspis-1] Entry for Chrysaspis in Tropicos .

[Greuter+al1983-2] Werner Greuter, Regina Pleger, Thomas Raus: The vascular flora of the Karpathos island group (Dodecanesos, Greece). A preliminary checklist. In: Willdenowia. Volume 13, No. 1, pp. 43-78, JSTOR 3995980 (first description on p. 61).

[Böhling+al2000-3] Niels B. Böhling, Werner Greuter, Thomas Raus: Trifolium phitosianum (Leguminosae), a new annual clover species from Greece. In: Botanika Chronika. Volume 13, 2000, pp. 37-44 (first description on p. 39).