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Growing habit, Tenerife, Canary Islands, Spain, 14 February 2018.
Origin and Habitat: Tenerife, Canary Islands.
Habitat and ecology: Greenovia aizoon is a rare succulent that naturally occurs in rock crevices, most numerous in the south-east facing rock walls in south-central parts of Tenerife in the sub-alpine zone, about 2,000 metres above sea level, but descending to 800(-600) metres.
Aeonium aizoon (Bolle) T.Mes
Evol. Syst. Crassulaceae 41 1995.
- Aeonium aizoon (Bolle) T.Mes
- Greenovia quadrantalis Webb
ENGLISH: mountain rose
SPANISH (Español): Rosas del Monte
Description: Aeonium aizoon, best known as Greenovia aizoon, is a perennial succulent that forms a clump of tiny, dark green rosettes, with dead leaves persisting on the much-branched very reduced stems. The flowering stem is about 15 cm high, terminating in a flat head of small yellow flowers.
Rosettes: Nearly sessile, 3-5(-6) cm in diameter, flattish, rather open during the dry season (summer).Plants makes several offsets and will form a dense cushion in time.
Leaves: 20-35 mm long, compact, 10-15 mm wide, 1-2 mm thick, oblong-spatulate, apically truncate with apiculate tip, basally broadly attenuate from near the tip, green, densely glandular-pubescent (= hairy), viscid.
Inflorescence: Few flowered, short, flat-topped, floriferous part 2-5 x 4-10 cm, commonly 10- to 40-flowered; peduncle 8-12 cm long, densely leafy; Pedicels 1-3 mm long, pubescent.
Flowers: 17-to 21-merous, bright yellow; Sepals pubescent; Petatals 6-7 mm long, 1-1.5 mm wide, obovate to broadly oblanceolate, acute, deep yellow. Filaments glabrous.
Bibliography: Major references and further lectures
1) Urs Eggli “Illustrated Handbook of Succulent Plants: Crassulaceae” Springer Berlin Heidelberg, 05/Nov/2012
2) “Botanica: The Illustrated A-Z of Over 10,000 Garden Plants and how to Cultivate Them” Mynah, 1997
3) Greenovia aizoon Bolle in: “Anales del Instituto Nacional de Investigaciones Agrarias: Serie, Producción vegetal”, Edizioni 3-4, Instituto Nacional de Investigaciones Agrarias., 1973
Cultivation and Propagation: Greenovia aizoon is easy to grow and is a good choice for stone steps, dry walls or pots. It is easily cultivated in any rich, well drained, slightly stony soil in a sunny spot (best if in morning sun, but will tolerate afternoon heat if cared for). It requires a sunny spot in winter with careful watering as the main growing season is from autumn to late spring. Keep partially shaded in summer.
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