Aeonium haworthii

Aeonium haworthii, also known as Haworth's aeonium or pinwheel, is a species of succulent flowering plant in the family Crassulaceae. It is grown as a houseplant in temperate regions. It has gained the Royal Horticultural Society's Award of Garden Merit,[2] as has the cultivar 'Variegatum'.[3]

Aeonium haworthii
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Aeonium
Species:
A. haworthii
Binomial name
Aeonium haworthii
Synonyms[1]
  • Sempervivum haworthii (Webb & Berthel.) Salm-Dyck ex Christ

Distribution

A. haworthii is native to the Canary Islands and northern Africa, but it has been introduced to other areas of similar climate, such as Southern California.[4] In the US, it is suitable to be grown outside in USDA hardiness zones 9-11.[5] This species is drought tolerant and prefers full sun.[6] It is sometimes susceptible to aphids and mealybugs.[7] It is a sand-dwelling beach plant, a subshrub with rough, woody stems and rosettes of thick, red-edged green leaves which are triangular or diamond- or spade-shaped.[4]

Description
Inflorescence

It grows as a densely branched small shrub and reaches stature heights of up to 60 centimeters. The almost bare, somewhat mesh-like, ascending or hanging, winding shoots have a diameter of 3 to 6 millimeters. Their rather flat rosettes reach a diameter of 6 to 11 centimeters. The inner leaves are more or less upright. The obovate, green or yellowish green, often very heavily bluish, almost bare leaves are 3 to 5.5 centimeters long, 1.5 to 3 centimeters wide and 0.25 to 0.4 centimeters thick. They are pointed and trimmed towards the top. The base is wedge-shaped. The leaf margin is covered with curved eyelashes that are 0.4 to 0.8 millimeters long. The leaves are often reddish variegated along the edge.[8]

It has panicles of cream-colored pointed flowers produced in spring.[5] The loose, hemispherical inflorescence has a length of 6 to 16 centimeters and a width of 6 to 16 centimeters. The peduncle is 1 to 9 centimeters long. The seven-to nine-digit flowers are on a 2 to 12 millimeter long, bare flower stem. Its sepals are bald. The pale yellow to whitish, pink variegated, lanceolate, pointed petals are 7 to 9 millimeters long and 1.2 to 1.8 millimeters wide. The stamens are almost glabrous to sparsely weak downy.[9]

Cultivars

References
  1. The Plant List: A Working List of All Plant Species, retrieved 30 July 2016
  2. "RHS Plant Selector - Aeonium haworthii". Retrieved 23 February 2020.
  3. "Aeonium haworthii 'Variegatum'". Royal Horticultural Society. Retrieved 3 January 2018.
  4. "Aeonium haworthii 'Kiwi'". BBC Gardeners' World Magazine. Retrieved 2021-04-07.
  5. "Aeonium Haworthii Care: Growing Pinwheel Plants". Plant Care Today. 2019-06-01. Retrieved 2021-04-07.
  6. "Kernock Park Plants Ltd Aeonium haworthii 'Bicolor'". www.kernock.co.uk. Retrieved 2021-04-07.
  7. Ltd, GardensOnline Pty. "Aeonium haworthii | GardensOnline". www.gardensonline.com.au. Retrieved 2021-04-07.
  8. Reto Nyffeler: Aeonium haworthii . In: Urs Eggli (ed.): Succulent plant dictionary. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , p. 17 .
  9. RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
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