Duboisia

Duboisia
	Duboisia myoporoides , illustration
Systematics
	Nuclear eudicotyledons
	Asterids
	Euasterids I
Order :	Nightshade (Solanales)
Family :	Nightshade family (Solanaceae)
Genre :	Duboisia
Scientific name
	Duboisia
	R.Br.

Duboisia is a plant genus with four known species of the family of the Solanaceae family . It wasfirst describedby Robert Brown in 1810. The name honors the British trader and botany supporter Charles du Bois (1656-1740).

description

Duboisia are small shrubs ( D. hopwoodii ) 1.5 to 4 meters high or trees ( Duboisia myoporoides , Duboisia leichhardtii ) up to 24 meters high. Two types have cork-like bark, the wood of the plants is very light.

The leaves are 2 to 15 cm long, oblong ovate, ovate-elliptical or linear, rarely oval or narrowly elliptical. The inflorescences are strongly branched, roughly pyramidal or closely structured; up to 15 cm long. The flower sits on a peduncle 1.5 to 16 mm long. The bell-shaped calyx is 1.5 to 4.5 mm in length, its calyx teeth are significantly shorter than the tube. The flower is bell-shaped to funnel-shaped and 4 to 19 mm long. The tips of the corolla are elongated and narrow; usually a little shorter or exactly as long as the tube. The four (sometimes five) stamens are of two different lengths, and now and then a stunted staminodium appears. The anthers are 0.5 to 1 mm long. The scar is bilobed or divided into two parts.

The fertilized flowers produce purple-black berries with a size of 4 to 5 mm (sometimes up to 8 mm), they are round or slightly flattened, rarely ellipsoid. The berries contain only a few seeds, usually only two to nine, rarely up to 12. The seeds are 2.2 to 2.3 mm long, the embryo is slightly curved.

ingredients

The plants contain poisonous alkaloids such as scopolamine , hyoscyamine , duboisin and piturin . The active pharmaceutical ingredient butylscopolamine is obtained synthetically from scopolamine .

Duboisia hopwoodii

Duboisia myoporoides

Occurrence

The home of the Duboisia is New Caledonia and Australia . A hybrid of Duboisia myoporoides and Duboisia leichhardtii is cultivated in southern Queensland for the production of scopolamine and hyoscyamine.

Systematics

Four types are distinguished within the genus:

Duboisia arenitensis Craven, Lepschi & Haegi : It occurs in northern Australia.
Duboisia hopwoodii (F.Muell.) F.Muell. : It occurs in Australia.
Duboisia leichhardtii (F.Muell.) F.Muell. : It occurs in Queensland.
Duboisia myoporoides R.Br. : It occurs in Australia, New Zealand and New Caledonia.

The type species is Duboisia myoporoides .

proof

literature

Armando T. Hunziker: The Genera of Solanaceae. ARG Gantner Verlag KG, Ruggell, Liechtenstein 2001. ISBN 3-904144-77-4 .

Individual evidence

↑ ^a ^b R.W. Purdie, DE Symon and L. Haegi: Duboisia . In: Solanaceae , Flora of Australia, Volume 29, Australian Government Publishing Service, Canberra, 1982. pp. 17-21. ISBN 0-642-07015-6 .
↑ ^a ^b Duboisia arenitensis . Entry on the International Plant Name Index (IPNI), online, accessed January 21, 2010.
^ ^A ^b ^c Duboisia in Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 1, 2017.

Web links

Commons : Duboisia - collection of images, videos and audio files

[FOA-1] R.W. Purdie, DE Symon and L. Haegi: Duboisia . In: Solanaceae , Flora of Australia, Volume 29, Australian Government Publishing Service, Canberra, 1982. pp. 17-21. ISBN 0-642-07015-6 .

[IPNI-2] Duboisia arenitensis . Entry on the International Plant Name Index (IPNI), online, accessed January 21, 2010.

[GRIN-3] A ^b ^c Duboisia in Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 1, 2017.