Haworthia nigra

Haworthia nigra
	Haworthia nigra
Systematics
	Monocots
Order :	Asparagales (Asparagales)
Family :	Grass trees (Xanthorrhoeaceae)
Subfamily :	Affodilla family (Asphodeloideae)
Genre :	Haworthia
Type :	Haworthia nigra
Scientific name
	Haworthia nigra
	( Haw. ) Baker

Haworthia nigra is a species of the genus Haworthia in the subfamily of the Affodill family (Asphodeloideae).

description

Haworthia nigra usually grows trunk-forming and sprouts slowly or often forms runners. The upright or bent-back, ovate-triangular leaves form a rosette with a height of up to 5 centimeters or occasionally more. The blackish to gray-green, opaque leaf blade is up to 3 inches long and 1.5 inches wide. The leaf surface is rough. There are clearly raised warts of the same color on it that do not flow together.

The simple, loose inflorescence reaches a length of up to 40 centimeters and consists of upright flowers . The upside-down flower tube is curved and the inner tepals are rolled back.

Systematics and distribution

Haworthia nigra is common in the South African provinces of Limpopo , Western Cape and Eastern Cape .

The first description as Apicra nigra by Adrian Hardy Haworth was published in 1824. John Gilbert Baker placed the species in the genus Haworthia in 1880 .

Aloe nigra (Haw.) Roem are nomenclatory synonymous . & School f. (1829), Haworthia venosa subsp. nigra (Haw.) Halda (1997) and Haworthia viscosa subsp. nigra (Haw.) Halda (1998).

A distinction is made between the following varieties :

Haworthia nigra var. Nigra
Haworthia nigra var. Diversifolia (Poelln.) Uitewaal

proof

literature

Martin Bruce Bayer , Ernst Jacobus van Jaarsveld : Haworthia nigra . In: Urs Eggli (Hrsg.): Succulent lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 224 .

Individual evidence

^ Adrian Hardy Haworth: Decas secunda novarum Plantarum Succulentarum . In: Philosophical Magazine . Volume 64, 1824, p. 302 ( online ).
↑ John Gilbert Baker: A Synopsis of Aloineae and Yuccoideae . In: Journal of the Linnean Society. Botany . Volume 18, London 1881, p. 203 ( online ).

Web links

Commons : Haworthia nigra - collection of images, videos and audio files

Haworthia nigra var. Nigra in the Red List of South African Plants
Haworthia nigra var. Diversifolia in the Red List of South African Plants

[1] Adrian Hardy Haworth: Decas secunda novarum Plantarum Succulentarum . In: Philosophical Magazine . Volume 64, 1824, p. 302 ( online ).

[2] John Gilbert Baker: A Synopsis of Aloineae and Yuccoideae . In: Journal of the Linnean Society. Botany . Volume 18, London 1881, p. 203 ( online ).