Rock thick leaf

Rock thick leaf
	Rock thick leaf
Systematics
	Nuclear eudicotyledons
Order :	Saxifragales (Saxifragales)
Family :	Thick-leaf family (Crassulaceae)
Subfamily :	Crassuloideae
Genre :	Thick leaf ( Crassula )
Type :	Rock thick leaf
Scientific name
	Crassula rupestris
	Thunb.

The rock thick leaf ( Crassula rupestris ) is a species of the thick leaf family (Crassulaceae). The specific epithet is derived from the Latin word rupestris for 'rock'.

description

Crassula rupestris grows as a rounded, heavily branched, succulent shrub and reaches heights of up to 4 meters. The roots are fibrous. The initially green, 2 millimeter thick shoots turn gray-brown with age, measure 5 millimeters in diameter and then have a peeling bark . The flattened leaves are 13 to 18 millimeters long and 10 to 15 millimeters wide. Their top is flat to convex, but concave towards the base. The underside of the leaf is convex in shape. The broadly ovate, bald, gray-green leaf blade is powdery. At its base it is contracted and fused with the opposite leaf. The leaves have entire margins and are reddish in color at the edge. The tip of the leaf is pointed or blunt.

The inflorescence is a rounded thyrsus with numerous dichasias . The peduncle is up to 2 inches long. It has spread bracts up to 3 millimeters in length. The elongated triangular sepals of the flowers are up to 1 millimeter long. The tubular, elongated, yellowish corolla is up to 4 millimeters long. Their corolla lobes are briefly fused together at the base. The stamens are brown.

Systematics and distribution

Crassula rupestris is common in Namibia and South Africa. The first description was in 1778 by Carl Peter Thunberg . The following subspecies are distinguished:

Crassula rupestris subsp. commutata (Friedrich) Toelken
Crassula rupestris subsp. marnieriana (H.Huber & H.Jacobsen) Toelken
Crassula rupestris subsp.

proof

literature

Urs Eggli (ed.): Succulent lexicon. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , pp. 72-73 .

Individual evidence

↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 207.
↑ Nova acta physico-medica Academiae caesareae Leopoldino-Carolinae naturae curiosorum, exhibentia ephemerides sive observationes historias et experimenta a celeberrimis Germaniae et exterarum regionum viris . Volume 6, 1778, pp. 329, 337.

Web links

Commons : Felsen-Dickblatt ( Crassula rupestris ) - Collection of images, videos and audio files

Entry at PlantZAfrica.com

[1] Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 207.

[2] Nova acta physico-medica Academiae caesareae Leopoldino-Carolinae naturae curiosorum, exhibentia ephemerides sive observationes historias et experimenta a celeberrimis Germaniae et exterarum regionum viris . Volume 6, 1778, pp. 329, 337.