Sempervivum borissovae

Sempervivum borissovae
	Sempervivum borissovae
Systematics
Family :	Thick-leaf family (Crassulaceae)
Subfamily :	Sempervivoideae
Tribe :	Semperviveae
Genre :	Hauswurzen ( Sempervivum )
Section :	Sempervivum sect. Sempervivum
Type :	Sempervivum borissovae
Scientific name
	Sempervivum borissovae
	Whales

Sempervivum borissovae is a species of houseleek ( Sempervivum ) in the thick-leaf family(Crassulaceae).

description

Vegetative characteristics

Sempervivum borissovae grows as a fairly open, flat rosette plant with a diameter of up to 3 centimeters and short, slender runners . The obovate, almost stem-round, bare leaves have a strong tip. Its green leaf blade is reddish brown in the upper half. It is about 2 millimeters long, 9 millimeters wide and about 3 millimeters thick.

Generative characteristics

The flowering shoot reaches a length of 7 to 10 centimeters. It has bare, green or reddish-brown leaves down to the base of the back. The 12 to 14-fold flowers have a diameter of about 2.5 centimeters. Their reddish sepals are up to 8 millimeters long. The lanceolate, deep pink petals have somewhat lighter, less irregularly sawn edges. The stamens are lilac to dark red, the dust bag red and the stylus bright pink.

genetics

The number of chromosomes is . ${\ displaystyle 2n = 72}$

Systematics and distribution

Sempervivum borissovae is widespread in the Caucasus between rocks on a rib at an altitude of about 1850 meters. The species is only known from the locality of the type.

The first description by Royden Samuel Wale was published in 1942. A nomenclature synonym is Sempervivum caucasicum var. Borissovae (Wale) Gurgen. (1972).

The species name borissovae honors the Russian botanist at the Komarov Institute in St. Petersburg, Ms. Antonina Georgievna Borissova (1903–1970), who dealt with the Sedum and Sempervivum species.

proof

literature

Henk 't Hart, Bert Bleij, Ben Zonneveld: Sempervivum borissovae . In: Urs Eggli (Hrsg.): Succulent lexicon. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , pp. 351 .

Individual evidence

^ Quarterly Bulletin of the Alpine Garden Society . Volume 10, 1942, p. 95.
↑ Urs Eggli , Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer-Verlag Berlin, Heidelberg, New York. Page 29, 2004. ISBN 3-540-00489-0

Web links

Photo by Sempervivum borissovae

[1] Quarterly Bulletin of the Alpine Garden Society . Volume 10, 1942, p. 95.

[2] Urs Eggli , Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer-Verlag Berlin, Heidelberg, New York. Page 29, 2004. ISBN 3-540-00489-0