Biology:Kalanchoe tomentosa
| Kalanchoe tomentosa | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Kalanchoe |
| Species: | K. tomentosa
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| Binomial name | |
| Kalanchoe tomentosa Baker (1882)[1]
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| Synonyms[1] | |
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Kalanchoe tomentosa, also known as the panda plant, pussy ears, or chocolate soldier,[2][3] is a species of succulent plant in the family Crassulaceae. A native of Madagascar, it is widely cultivated as an ornamental plant due to its distinctive velvety, silver-green leaves with chocolate-brown markings. It has received the Royal Horticultural Society's Award of Garden Merit.[3]
Description
Kalanchoe tomentosa is a slow-growing, evergreen, semi-woody perennial succulent subshrub with an erect growth form.[2][4] It can reach a height of 0.4 to 1 m (1.3 to 3.3 ft) and a spread of up to 0.9 m (3.0 ft),[2][3] though it typically remains smaller in cultivation, around 30 to 50 cm (12 to 20 in).[5] Young roots are red with white tips.[2]
The most distinctive feature of the plant is its leaves, which are thick, fleshy, and oval-shaped, typically measuring up to 9 cm (3.5 in) in length.[3] The leaves are arranged opposite or in a loose rosette and are densely covered with fine, silvery-white to grayish hairs (trichomes), giving them a velvety or felt-like texture.[2][4] The leaf margins are scalloped and tipped with a series of dark brown to rusty-red spots or a continuous chocolate-brown rim, a characteristic that inspired the common name "chocolate soldier."[2][5] In mature plants, young leaves appear whitish and erect, while older leaves become lighter green, less fuzzy, and more horizontal.[2]
The flowers are small, tubular, and bell-shaped, measuring about 1 cm (0.39 in) in length, and are borne in panicles atop erect stalks that can reach up to 45 cm (18 in) in height.[3][4] Flower colors range from greenish-white to yellow-green, sometimes with brown or purple petal tips.[2][4] In their natural habitat, they bloom between March and June; however, indoor plants rarely flower.[5][2] The fruit is a dry capsule containing numerous small seeds.[2]
Taxonomy
The species was first described by the British botanist John Gilbert Baker in 1882 in the Journal of Botany, British and Foreign, based on collections made from east-central Madagascar.[1][6] The specific epithet tomentosa is derived from the Latin tomentosus, meaning "covered with dense, matted hairs,"[4][5] in reference to the plant's velvety foliage. A heterotypic synonym, Bryophyllum triangulare Blanco (1845), has been rejected as a name to be rejected.[1]
In a 2023 revision, Smith provided an amplified description of the species and designated an epitype to clarify the application of the name.[6] The species is highly variable in leaf shape, hair density, and margin coloration, which has led to the description of numerous cultivars.[6]
Distribution and habitat
Kalanchoe tomentosa is endemic to east-central Madagascar, where it grows primarily in the seasonally dry tropical biome.[1][4] Its natural habitat consists of rocky, well-drained soils, often on granite outcrops, in arid and semi-arid regions.[5]
Cultivars
Numerous cultivars have been developed, selected for variations in leaf size, shape, and coloration:[5][4]
- 'Chocolate Soldier' – The most common cultivar, featuring narrower, pale-colored leaves with a more uniform and thicker dark chocolate-brown margin. It is reportedly faster-growing and has a clumping habit.[4][7]
- 'Golden Girl' – Characterized by golden-yellow, fuzzy leaves that become more vibrant with increased sunlight exposure. It produces clusters of golden trumpet-shaped flowers.[8]
- 'Teddy Bear' – Features rounder, chocolate-brown leaves densely covered with fuzz and almost black markings at the tips.[4]
- 'Cinnamon' – Has long, oval-shaped russet leaves that appear almost black when grown in full sun.[4]
- 'Nigra' – Exhibits extremely dark brown to nearly black leaf margins, which can be dotted or continuous.[5]
- 'Rubra' – Displays a reddish hue, particularly pronounced along the leaf edges, with a golden-red shimmer.[5]
- 'Black Tie' – Another dark-margined selection.[9]
Cultivation
Kalanchoe tomentosa is widely cultivated as a houseplant and in rock gardens, container gardens, and succulent gardens in warm climates. It is prized for its attractive, tactile foliage and low-maintenance requirements.[2][4]
Growing conditions
The plant thrives in bright, indirect sunlight, though it can tolerate some direct sun; however, intense afternoon sun may cause leaf burn.[4][10] Insufficient light results in leggy, elongated growth.[4]
A well-draining potting mix, such as a cactus or succulent mix, is essential to prevent root rot.[2][3] The plant prefers temperatures between 15 and 23 °C (59 and 73 °F) and is not frost-hardy; it should be grown in USDA hardiness zones 9–11 or brought indoors during winter.[4][11]
Watering and feeding
Water should be applied thoroughly but infrequently, allowing the top 2.5 cm (0.98 in) of soil to dry out completely between waterings.[2] Overwatering is a common cause of plant failure, leading to root rot and mushy leaves.[4] During the winter dormancy period, watering should be reduced significantly.[3] Fertilization is generally minimal; a half-strength balanced liquid fertilizer can be applied monthly during the growing season.[2]
Propagation
The species is easily propagated by stem or leaf cuttings.[2][5] Cuttings should be allowed to callus for one to two days before being placed in a well-draining potting mix. Seeds can also be used, sown at 19 to 21 °C (66 to 70 °F) in early spring.[3]
Pests and diseases
Common pests include mealybugs, aphids, and spider mites.[4][3] Overwatering can lead to root rot, and high humidity may promote powdery mildew or rust.[3] Shriveled or wrinkled leaves typically indicate underwatering, while yellow or mushy leaves suggest overwatering.[4]
Toxicity
Like many species in the genus Kalanchoe, K. tomentosa is toxic to cats and dogs, and mildly toxic to humans if ingested.[10] It is recommended to keep the plant out of reach of pets and small children.[4]
Common names
The plant is known by many common names across different languages and regions:[12]
- English: Panda plant, pussy ears, chocolate soldier, velvet leaf kalanchoe, plush plant, teddy bear cactus, cocoon plant[10]
- Chinese: 月兔耳 (yuè tù ěr, "moon rabbit ear") or 褐斑伽蓝 (hè bān qié lán)[12]
- Dutch: Pandaplant[12]
- Indonesian: Kaktus panda[12]
- Polish: Żyworódka omszona[12]
- Ukrainian: Каланхое повстисте[12]
Uses
The plant is primarily grown as an ornamental for its striking foliage. It is suitable for indoor containers, hanging baskets, rooftop gardens, and rockeries.[2] In its native Madagascar, there is a popular belief that when a panda plant flowers for someone, it is an indication of richness and prosperity for their household.[7]
Conservation
As of 2026, Kalanchoe tomentosa has not been formally assessed for the IUCN Red List. However, it is listed as a species of "least concern" by the Angiosperm Extinction Risk Predictions project, though with low confidence.[1] The species is widely cultivated and not considered threatened in the wild, though habitat loss in Madagascar could impact wild populations.
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "Kalanchoe tomentosa Baker". Royal Botanic Gardens, Kew. https://powo.science.kew.org/taxon/274502-1.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 "Kalanchoe tomentosa". National Parks Board, Singapore. https://www.nparks.gov.sg/florafaunaweb/flora/3/4/3449.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 "Kalanchoe tomentosa panda plant". https://www.rhs.org.uk/plants/9701/kalanchoe-tomentosa/details.
- ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 "Kalanchoe tomentosa (Panda Plant)". NC State University. https://plants.ces.ncsu.edu/plants/kalanchoe-tomentosa/.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 "Kalanchoe tomentosa: location, care & propagation". https://plantura.garden/uk/houseplants/kalanchoe-tomentosa/kalanchoe-tomentosa-overview.
- ↑ 6.0 6.1 6.2 Smith, Gideon F. (2023). "Taxonomy and nomenclature of Kalanchoe tomentosa (Crassulaceae subfam. Kalanchooideae), a variable, completely hairy species from Madagascar". Phytotaxa 609 (4): 267–276. doi:10.11646/phytotaxa.609.4.5.
- ↑ 7.0 7.1 "Kalanchoe tomentosa 'Chocolate Soldier'". http://smgrowers.com/products/plants/plantdisplayPrintView.asp?plant_id=3970.
- ↑ "Kalanchoe tomentosa 'Golden Girl'". https://worldofsucculents.com/kalanchoe-tomentosa-golden-girl/.
- ↑ "Kalanchoe tomentosa". https://www.wikidata.org/wiki/Q142606.
- ↑ 10.0 10.1 10.2 "Chocolate Soldier Plant Profile". https://www.thespruce.com/chocolate-soldier-plant-profile-5024790.
- ↑ "Kalanchoe tomentosa - Panda Plant". https://www.chicagobotanic.org/plant-information/plant-finder/kalanchoe-tomentosa-panda-plant.
- ↑ 12.0 12.1 12.2 12.3 12.4 12.5 "Kalanchoe tomentosa - common names". https://plantaedb.com/taxa/phylum/angiosperms/order/saxifragales/family/crassulaceae/genus/kalanchoe/species/kalanchoe-tomentosa.
External links
Data related to Kalanchoe tomentosa at Wikispecies
Wikidata ☰ Q142606 entry
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