Aichryson
Aichryson punctatum on La Palma
Aichryson is a genus of flowering plants in the family Crassulaceae ( Crassulaceae ). The botanical name comes from an ancient Greek term that was used by Dioscorides for Aeonium arboreum Pedanios. It is derived from the words " aei " forever and " chrysos " for gold.
- 3.1 Literature
- 3.2 Notes and references
Description
Vegetative characteristics
The species of the genus Aichryson are either one - to three-year, single or sparsely to densely branched monokarpe growing herbaceous plants ( section Aichryson ) or bald, almost bald or hairy, branched arching perennial small shrubs ( section Macrobia ). The densely hairy or bald shoots reach at the base diameter between 3 and 12 mm. You are ascending or spreading, forked or branched widely spreaded. The branches are sometimes slightly woody. The simple, alternate, near the shoot tips often rosettigen leaves are stalked sitting or clear. Your ovate, obovate, plaster trowel -shaped, rhombic or wrong plaster trowel -shaped leaf blade is more or less distinctly succulent. The Spreitenspitze is blunt, rounded or somewhat pointed, wedge-shaped, narrowed or trimmed. The often purple colored leaf margin is entire or slightly notched tiny. He is bald, hairy or nearly glabrous significantly. He rarely is glandular hairy and sticky.
The roots are fibrous.
Inflorescences and flowers
The seated at the shoot tips inflorescence is loose and occasionally something ebensträußig. The thread- thin flower stem is from 2 to 20 millimeters long. The 6 - to 12 -fold flowers achieve diameter between 6 and 16 millimeters. Your bald or hairy sepals are fused fleshy and basal. The pale or deep yellow petals are lanceolate, elliptical or ovoid and occasionally have a mounted Spitzchen.
The thread-like stamens are free. The cylindrical anthers are yellowish. There are twice as many stamens as petals. The elongated Nektarschüppchen have a length of 0.5 to 0.9 mm and a width of 0.4 to 0.6 millimeters. They are 2 - to 5 -column and a wedge. The yellowish carpels are basally recessed into the base of the flower. They are provided glabrous or with a few glandular hairs. There are as many carpels as there are petals.
Seed
The seeds are brownish warty to ribbed.
Systematics and distribution
The genus Aichryson is common in the Canary Islands, Madeira and the Azores island of Santa Maria. In Portugal it is wild.
After Reto Nyffeler the genus includes Aichryson the following ways:
- Section Aichryson Aichryson bollei
- Aichryson brevipetalum
- Aichryson divaricatum
- Aichryson dumosum
- Aichryson laxum
- Aichryson pachycaulon
- Aichryson palmense
- Aichryson parlatorei
- Aichryson Porphyrogenitus
- Aichryson punctatum
- Aichryson villosum
- Section Macrobia Aichryson bethencourtianum
- Aichryson tortuosum
As well as the hybrids Aichryson × aizoides.