Poellnitzia rubriflora

Poellnitzia rubriflora
	Poellnitzia rubriflora
Systematics
	Monocots
Order :	Asparagales (Asparagales)
Family :	Grass trees (Xanthorrhoeaceae)
Subfamily :	Affodilla family (Asphodeloideae)
Genre :	Poellnitzia
Type :	Poellnitzia rubriflora
Scientific name of the genus
	Poellnitzia
	Uitewaal
Scientific name of the species
	Poellnitzia rubriflora
	( L.Bolus ) Uitewaal

inflorescence

Poellnitzia rubriflora is the only plant species of the monotypic genus Poellnitzia from the subfamily of the Affodil family (Asphodeloideae). The botanical name of the genus honors the German farmer and botanist Karl von Poellnitz , who dealt intensively with the systematics of succulents. The specific epithet rubriflora is derived from the Latin words rubra for 'red' and -florus for 'blooming' and refers to the flower color of the species.

description

Vegetative characteristics

Poellnitzia rubriflora is an herbaceous , stem-forming, sprouting, perennial plant. Their shoots are up to 25 centimeters long and about 1 centimeter in diameter. The dark green, thick and hard leaves form four-line rosettes . They are bulky-brick and arranged in spiral rows. The leaf blade is 2 to 4 inches long, about 2 inches wide at the base and up to 0.5 inches thick. The leaf margin is tiny, rough, the leaf tip piercing-pointed.

Inflorescences and flowers

The inflorescence is a simple, initially horizontal, up to 50 centimeters long panicle . The lower sterile parts are covered with bracts. The upright flowers are one-sided. The short flower stalks are erect and persistent. The orange to red tepals have dark green tips. The tepals are fused at their base to form a narrow, elongated flower tube. The tube is about 2 inches long and 3 millimeters in diameter. It is slightly bent in the upper third. The free parts of the tepals stick together closely. At their tip they are spoon-shaped and bent together. The six stamens start in the perigone tube and are about 18 millimeters long. Their stamens are light green. The yellow, dorsifix anthers tear open lengthways and are intrors. The green, sedentary ovary is 6 to 7 millimeters long and has a diameter of 3 millimeters. The 12 millimeter long stylus is white, straight and head-shaped.

Fruits and seeds

The fruits are cylindrical, triple, loculicidal capsule fruits , the tip of which is rounded. They are about 16 millimeters long and reach a diameter of 3 to 4 millimeters. The capsule fruits contain angular, dark brown to black, short-winged seeds about 4 millimeters long.

genetics

The number of chromosomes is . ${\ displaystyle 2n = 14}$

Systematics and distribution

Poellnitzia rubriflora is in the South African province of Western Cape in the Robertson Karoo , d. H. Widespread in the area around Robertson , Bonnievale and McGregor , especially in the winter rainy area in Karoo -like shrubbery at altitudes of about 150 to 200 meters.

The first description as Apicra rubriflora by Harriet Margaret Louisa Bolus was published in 1920. Antonius Josephus Adrianus Uitewaal established the genus Poellnitzia for this species in 1940 .

Poellnitzia rubriflora is morphologically similar to some species of the genera Aloe , Astroloba and Haworthia . The flower morphology, however, is unique within the group of the Alooideae, as the dark green, free sections of the tepals remain inclined and have folded-in-flapper, hardly spreading, extreme tips.

It forms intergeneric hybrids with species of the genus Gasteria (× Poellneria G.D.Rowley ) and triple hybrids with species of the genera Gasteria and Haworthia (= × Cummingara G.D.Rowley )

Nomenclatory synonyms are Astroloba rubriflora (L.Bolus) E. Lamb (1955, nom. Inval. ICBN -Article 33.2), Haworthia rubriflora (L.Bolus) Parr (1971) , Aloe rubriflora (L.Bolus) GDRowley (1981) and Astroloba rubriflora (L.Bolus) Gideon F.Sm. & JCManning (2000). Apicra jacobseniana Poelln were included as a synonym in the species . (1939), Poellnitzia rubriflora var. Jacobseniana (Poelln.) Uitewaal (1955) and Haworthia rubriflora var. Jacobseniana (Poelln.) Parr (1972, nom. Inval. ICBN -Article 33.2).

proof

literature

Gideon Francois Smith: Poellnitzia . In: Urs Eggli (Hrsg.): Succulent lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 231 .

Individual evidence

↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 188.
↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 206.
↑ ^a ^b ^c Urs Eggli (Ed.): Sukkulenten-Lexikon. Monocotyledons . P. 231.
^ Annals of the Bolus Herbarium . Volume 3, London 1920, p. 13.
↑ AJA Uitewaal: Een nieuwgeslacht the Aloineae . In: Succulenta . Volume 22, 1940, pp. 61-64.
^ JC Manning, GF Smith: Asphodelaceae: Alooideae. The genus Poellnitzia included in Astroloba . In: Bothalia . Volume 30, number 1, 2000, p. 53. ( PDF )

Web links

Commons : Poellnitzia rubriflora - collection of images, videos and audio files

[1] Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 188.

[2] Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 206.

[eggli231-3] Urs Eggli (Ed.): Sukkulenten-Lexikon. Monocotyledons . P. 231.

[4] Annals of the Bolus Herbarium . Volume 3, London 1920, p. 13.

[5] AJA Uitewaal: Een nieuwgeslacht the Aloineae . In: Succulenta . Volume 22, 1940, pp. 61-64.

[6] JC Manning, GF Smith: Asphodelaceae: Alooideae. The genus Poellnitzia included in Astroloba . In: Bothalia . Volume 30, number 1, 2000, p. 53. ( PDF )