Aeonium lindleyi

Aeonium lindleyi is one of the most distinctive small aeoniums — instantly recognizable by its densely branching, bushy habit, its tiny rosettes of extraordinarily thick, hairy, glandular leaves, and above all by its sticky, balsamic fragrance: a warm, resinous scent that emanates from the entire plant in warm weather, filling the air around it with a perfume unique in the genus Aeonium. A succulent subshrub in the family Crassulaceae (subfamily Sempervivoideae, tribe Aeonieae, section Goochiae), it is native to the Canary Islands, where two subspecies grow on different islands: the type subspecies on northeastern Tenerife and subspecies viscatum on La Gomera. Among the smaller bushy aeoniums, it occupies a special ecological niche — dry rocky slopes and cliff faces at low to moderate elevations — and its viscid, glandular foliage represents one of the most developed balsamic adaptations in the genus. It was first described by Webb and Berthelot in 1840 and named in honor of the great English botanist John Lindley (1799–1865).

Taxonomy and Etymology

Aeonium lindleyi Webb & Berthel. is the accepted name according to POWO (Plants of the World Online). The species was first described in 1840 in the Histoire Naturelle des Îles Canaries (3(2; 1)). Cristini’s 2022 revision of the genus (Piante Grasse 42, Supplement) provides the most recent comprehensive treatment.

POWO recognizes two synonyms at the species level:

  • Sempervivum lindleyi (Webb & Berthel.) Christ (Botanische Jahrbücher für Systematik 9: 161, 1887)
  • Sempervivum villosum Lindl. (Edwards’s Botanical Register 18: t. 1553, 1832) — an illegitimate later homonym (nom. illeg.), as the name Sempervivum villosum was already occupied.

The genus name Aeonium derives from the Greek aionios (“ageless”). The specific epithet lindleyi honors John Lindley (1799–1865), one of the most influential botanists of the 19th century, professor of botany at University College London and author of foundational works on orchids and plant classification. Lindley himself had described the plant under the name Sempervivum villosum in 1832 with an excellent illustration (t. 1553), but the name was unavailable; Webb and Berthelot therefore renamed it lindleyi in his honor.

Accepted Subspecies

POWO recognizes two subspecies, each endemic to a different island:

1. subsp. lindleyi — Endemic to northeastern Tenerife (Anaga massif and surrounding areas: Taganana, San Andrés, Igueste de San Andrés, Punta de Hidalgo, Bajamar, extending to La Laguna and La Orotava). The leaves are glandular-pubescent (covered in fine glandular hairs) and extremely sticky.

2. subsp. viscatum (Bolle) Bañares — Endemic to La Gomera. Originally described as Aeonium viscatum Bolle (1859) at species rank. Synonyms include Sempervivum viscatum (Bolle) Christ (1887), Sempervivum tortuosum var. viscatum (Bolle) Kuntze (1891), and Aeonium lindleyi var. viscatum (Bolle) H.Y.Liu (1989). This subspecies differs from the type by its glabrous (not glandular-pubescent) but still viscid leaves — sticky but smooth rather than hairy.

Within the genus, Aeonium lindleyi is placed in section Goochiae (Liu, 1989), alongside Aeonium goochiae, Aeonium smithii, and Aeonium viscatum (now subsp. viscatum). This section groups bushy, small-rosette species with sticky or pubescent leaves, often forming dense clumps. Aeonium lindleyi is distinguished from its sectional relatives by its yellow flowers (not pink as in Aeonium goochiae), its glandular-pubescent leaves (not glabrous as in Aeonium viscatum), and its extraordinarily thick leaves — the highest thickness-to-breadth ratio of any Aeonium.

Botanical Description

Aeonium lindleyi is a densely branched, evergreen succulent subshrub reaching 50 to 70 centimeters in height, sometimes more in favorable conditions, often cascading from cliff faces and rock walls. The stems are woody, slender, much-branched, and themselves hairy and sticky. The plant forms compact, rounded mounds of numerous small terminal rosettes.

The rosettes are small, reaching up to 9 centimeters in diameter (typically 3–6 centimeters). The leaves are the species’ most distinctive feature: spathulate to rhomboidal, small (2–4.5 centimeters long, up to 1.5 centimeters wide), and remarkably thick — up to 6 to 7 millimeters, giving them a plump, swollen appearance unlike most other aeoniums. The leaf surface is covered in short, soft, glandular hairs (in subsp. lindleyi) that exude a sticky, balsamic resin with a pronounced warm, aromatic fragrance. The leaf color ranges from yellowish-green to dark green. The viscid coating likely serves multiple ecological functions: trapping small insects (though the plant is not carnivorous), deterring herbivores, reducing water loss, and protecting against UV radiation.

The inflorescence is a branched cymose-panicle bearing small, star-shaped, 8- to 9-merous, bright yellow flowers in late spring to early summer. Each flowering rosette is monocarpic, but the densely branching habit ensures the plant’s persistence through its many non-flowering rosettes.

A notable ethnobotanical detail: the sap of Aeonium lindleyi has been traditionally used in the Canary Islands as a folk remedy to soothe skin irritation caused by Euphorbia latex, although professional medical attention is always recommended for such injuries.

Natural Habitat and Ecology

Aeonium lindleyi grows on dry rocky slopes, cliff faces, and walls at relatively low to moderate elevations. On Tenerife, subsp. lindleyi is concentrated in the northeastern Anaga massif and the northern coast, from sea level to approximately 1,000 meters, with most populations between 200 and 500 meters. This is the lower, drier xerophytic scrub and thermophilous woodland zone, not the humid laurisilva. On La Gomera, subsp. viscatum occupies similar habitats.

The species frequently grows hanging from cliff faces and rock walls, creating cascading mounds of small sticky rosettes — a characteristic silhouette in the Anaga landscape. It tolerates more heat and drought than the laurel forest aeoniums, but still benefits from the moderate oceanic humidity of the northern Canarian coast.

Aeonium lindleyi hybridizes with co-occurring species on Tenerife. The most notable documented hybrid is × anagense P.V.Heath — a natural cross with Aeonium tabuliforme found in the Anaga massif, where the two species’ ranges overlap.

The species is not currently assessed on the IUCN Red List. Subsp. lindleyi is locally common in the Anaga Rural Park (UNESCO Biosphere Reserve).

Cultivation and Care

Aeonium lindleyi is available from succulent nurseries and is one of the more charming small aeoniums for container culture. It is suited to USDA hardiness zones 10a to 11b (minimum approximately −1 °C / 30 °F). It is more frost-tender than many Canarian aeoniums and requires winter protection in all but the mildest Mediterranean and subtropical climates.

Exposure. Full sun to partial shade. A sunny position produces the most compact growth, the strongest balsamic fragrance, and the best leaf coloration. The species tolerates some shade but becomes leggy. In hot inland climates, provide afternoon shade to prevent heat stress during summer dormancy.

Substrate. Well-drained potting mix with added grit. A loam-based compost with extra perlite or pumice (approximately 50:50 organic/mineral) is ideal. The species’ natural habitat on rocky cliff faces demands excellent drainage.

Watering. Winter grower with summer semi-dormancy. Water moderately during the cool growing season (autumn to spring), allowing the substrate to dry between waterings. In extreme summer heat, the leaves curl inward to reduce water loss — a natural protective behavior. Reduce or suspend watering during dormancy. Resume watering gradually in autumn.

Fertilization. Balanced liquid fertilizer at half strength, applied two to three times during the growing season.

Pruning and training. The naturally cascading habit makes Aeonium lindleyi excellent for hanging baskets, wall pots, and elevated containers where the branches can trail over the edges. Leggy stems can be pruned to promote bushier growth; cuttings root readily.

Propagation

Stem cuttings are the easiest and most effective method. The densely branching habit provides abundant material. Take a short stem section with a terminal rosette, callus for a few days, and root in a moist, well-drained mix. Rooting is rapid — typically one to two weeks in warm conditions.

Seed propagation is possible but seldom necessary given the ease of vegetative reproduction.

Pests and Diseases

Standard aeonium vulnerabilities: root rot from overwatering, mealybugs, and aphids. The sticky, glandular leaf surface traps small insects and debris, which should be rinsed off periodically to maintain the plant’s health and appearance. The viscid coating itself provides some natural deterrence against larger herbivorous pests.

Ornamental Interest and Uses

Aeonium lindleyi is a plant of sensory appeal — not just visual but olfactory. The warm, balsamic fragrance released by the glandular foliage in warm weather is unique among commonly cultivated succulents and adds an unexpected dimension to the container garden or greenhouse. The dense, bushy, cascading habit, the numerous tiny rosettes, and the plump, hairy, glistening leaves create a texture and character entirely different from the bold architectural silhouettes of the larger aeoniums.

It excels in hanging baskets, wall pockets, and elevated planters where its trailing branches can be displayed to advantage. It is also effective as a groundcover in frost-free climates, forming dense, fragrant mats over rocky surfaces. The variegated form (‘Variegata’), with cream-and-green splashed leaves, adds a brighter accent.

For the collector, it represents section Goochiae — the sticky, fragrant, small-rosette clade of the genus — and its two-island subspecific differentiation (Tenerife subsp. lindleyi vs. La Gomera subsp. viscatum) offers an informative comparison of inter-island morphological divergence.

The species is considered non-toxic and safe around children and pets. The sap has traditional ethnobotanical use as a soothing agent for Euphorbia latex irritation.

Authority Sites

Bibliography

  • Lindley, J. (1832). [Sempervivum villosum, nom. illeg.]. Edwards’s Botanical Register, 18: t. 1553. [First illustration and description, name unavailable.]
  • Webb, P.B. & Berthelot, S. (1840). Histoire Naturelle des Îles Canaries, 3(2; 1). Paris. [Original description of Aeonium lindleyi.]
  • Bolle, C. (1859). [Aeonium viscatum]. Bonplandia (Hannover), 7: 241. [Original description of subsp. viscatum at species rank.]
  • Christ, H. (1887). [Sempervivum lindleyi, Sempervivum viscatum]. Botanische Jahrbücher für Systematik, 9: 161.
  • Kuntze, O. (1891). [Sempervivum tortuosum var. viscatum]. Revisio Generum Plantarum, 1: 232.
  • Praeger, R.L. (1932). An Account of the Sempervivum Group. Royal Irish Academy, Dublin. [Discussion of leaf thickness ratios.]
  • Liu, H.-Y. (1989). Systematics of Aeonium (Crassulaceae). NMNS Taiwan Special Publication, 3: 1–102. [Section Goochiae; var. viscatum.]
  • Govaerts, R. (1995). World Checklist of Seed Plants, 1(1, 2): 1–483, 529. MIM, Deurne.
  • Mes, T.H.M. & ‘t Hart, H. (1996). The evolution of growth forms in the Macaronesian genus Aeonium (Crassulaceae) inferred from chloroplast DNA RFLPs and morphology. Molecular Ecology, 5: 351–363.
  • Mort, M.E., Soltis, D.E., Soltis, P.S., Francisco-Ortega, J. & Santos-Guerra, A. (2002). Phylogenetics and evolution of the Macaronesian clade of Crassulaceae. Systematic Botany, 27(2): 271–288.
  • Bramwell, D. & Bramwell, Z. (2001). Wild Flowers of the Canary Islands. 2nd edition. Editorial Rueda, Madrid.
  • Bañares Baudet, Á. & Marrero Rodríguez, M. (2008). Taxonomic and nomenclatural notes on Crassulaceae of the Canary Islands. Willdenowia, 38(2): 475–482. [Subsp. viscatum combination.]
  • Dobignard, A. & Chatelain, C. (2011). Index synonymique de la flore d’Afrique du Nord, vol. 3: 1–449. Éditions des Conservatoire et Jardin botaniques, Genève.
  • Muer, T., Sauerbier, H. & Cabrera Calixto, F. (2016). Die Farn- und Blütenpflanzen der Kanarischen Inseln. Margraf Publishers.
  • Cristini, M. (2022). The genus Aeonium. Piante Grasse, 42 (Supplement): 1–225.
  • Messerschmid, T.F.E., Abrahamczyk, S., Bañares Baudet, Á. et al. (2023). Inter- and intra-island speciation and their morphological and ecological correlates in Aeonium (Crassulaceae). Annals of Botany, 131(4): 697–722.