Cuscuta monogyna

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Cuscuta monogyna
Cuscuta monogyna on a wig bush (Cotinus coggygria)

Cuscuta monogyna on a
wig bush ( Cotinus coggygria )

Systematics
Asterids
Euasterids I
Order : Nightshade (Solanales)
Family : Bindweed family (Convolvulaceae)
Genre : Silk ( cuscuta )
Type : Cuscuta monogyna
Scientific name
Cuscuta monogyna
Vahl

Cuscuta monogyna is a plant from the genus silk ( Cuscuta ) in the family of wind plants (Convolvulaceae). Like all species in this genus, it is a full parasite .

description

Cuscuta monogyna is usually an annual herbaceous plant. It has thick stems .

The flowers are about 3 to 4 mm in size. They are sessile or have a short stalk and are in spike-like inflorescences from one to four-flowered spirals . The calyx is bell-shaped and about 2/3 as long as the corolla tube or almost as long. The calyx lobes are circular-egg-shaped, blunt and overlap each other. They are somewhat keeled and have a finely notched edge. The corolla lobes are ovate, blunt, finely notched and upright. They are about half as long as the cylindrical corolla tube. The anthers do not protrude beyond the crown. The scales at the base of the corolla tube are toothed and almost reach the stamens . The ovary is spherical-conical. The stylus is as long as the scar .

The fruits are capsules with the remains of the crown on top. The seeds are 3 to 3.5 mm long.

The number of chromosomes is 2n = 28 or 30.

Occurrence

This species occurs from Europe to Mongolia and Pakistan and in northwestern Africa. It parasitizes mainly on shrubs and trees, for example on Retama sphaerocarpa , Dittrichia viscosa and Tamarix species on the Iberian Peninsula .

Systematics

One can distinguish the following subspecies:

  • Cuscuta monogyna subsp. esquamata (Engelm.) Plitmann : It occurs from western and southwestern Turkey to Iran.
  • Cuscuta monogyna subsp. monogyna

literature

  • Naomi Feinbrun: Cuscuta. 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. 77 (English, limited preview in Google Book search).

Individual evidence

  1. ↑ a b c Miguel Ángel García: Cuscuta . In: Santiago Castroviejo, C. Andrés, M. Arista, MP Fernández Piedra, MJ Gallego, PL Ortiz, C. Romero Zarco, FJ Salgueiro, S. Silvestre, Alejandro Quintanar (eds.): Flora Ibérica. Plantas Vasculares de la Península Ibérica e Islas Baleares . Vol. XI. Gentianaceae - Boraginaceae . Real Jardín Botánico, CSIC, Madrid 2012, ISBN 978-84-00-09415-7 , p. 310 ( floraiberica.es [PDF]).
  2. ↑ a b c Rafaël Govaerts (Ed.): Cuscuta monogyna. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved February 4, 2016.

Web links

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