Stephanocereus
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Stephanocereus leucostele |
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| Scientific name | ||||||||||||
| Stephanocereus | ||||||||||||
| A. Berger |
Stephanocereus is a genus of plants fromthe cactus family (Cactaceae). The botanical name of the genus is derived from the Greek noun "στέφανος" (stephanos) for wreath , means wreath-cereus and refers to the wreath-like cephalium on the shoot tips. The type species of the genus is Stephanocereus leucostele .
description
The species of the genus Stephanocereus sometimes grow tree-like, are not branched or occasionally sprout from the base. They reach a height of 1 to 5 meters. The initially spherical or egg-shaped shoots are later elongated to columnar to bottle-shaped. The 12 to 20, low ribs carry areoles from which abundant white wool rises, which covers the shoot. The 1 to 4 central spines are white to gold in color and 3 to 4 inches long. The yellow to white, 15 to 20 radial spines are 0.5 to 1.5 centimeters long. The cephalium is located at the tip of the shoot or is ring-like. It is made up of dense bristles, white wool, and hair.
The tubular to funnel-shaped flowers are white to sometimes slightly pink and 2.6 to 7 inches long. They open at night. The pericarpel and the flower tube have a few scattered small scales and areoles that are bald or with little white wool.
The egg-shaped to elliptical, bare, non-tearing fruits are blue to slightly purple-green. The permanent remnant of the flower turns black. The flesh is clear as water. The large, egg to pear-shaped seeds are black and tuberous.
Distribution and systematics
The genus Stephanocereus is common in the Brazilian state of Bahia .
It was first described in 1926 by Alwin Berger . The type species of the genus is Stephanocereus leucostele . The genus includes the two species:
- Stephanocereus leucostele (Gürke) A.Berger
- Stephanocereus luetzelburgii (Vaupel) NPTaylor & Eggli
A synonym of the genus is Lagenosocereus Doweld (2002).
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 605-607 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape IV . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30383-X , p. 2549-2551 .
Individual evidence
- ↑ The lines of development of the cacti . Pp. 59, 97. 1926
- ^ Edward F. Anderson : The great cactus lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 606-607 .
further reading
- Patricia Soffiatti, Veronica Angyalossy: Anatomy of Brazilian Cereeae (subfamily Cactoideae, Cactaceae): Arrojadoa Britton & Rose, Stephanocereus A. Berger and Brasilicereus Backeberg . In: Acta Botanica Brasilica . Volume 21, number 4, 2007, pp. 813-822, doi : 10.1590 / S0102-33062007000400006 .
Web links
- Photos by Stephanocereus leucostele