Introduction & Discovery

Drosera aliciae, commonly known as Alice's sundew, is one of the most visually striking and beginner-friendly sundews in cultivation, instantly recognizable by its perfect geometric rosette of 25-40 wedge-shaped leaves radiating from a central crown, each leaf densely covered with crimson tentacles tipped in glistening mucilage. The species forms compact flat rosettes 5-12 cm in diameter that, in strong light, develop such intense red coloration that they look more like ornamental succulents than carnivorous plants. Native to the Western and Eastern Cape provinces of South Africa, D. aliciae shares the Cape Floristic Region with its famous cousin Drosera capensis, but occupies a different ecological niche: while capensis is a vigorous weedy colonizer, aliciae is a more refined and slower-growing resident of fynbos seepage bogs. Named in honor of Alice Arnold, wife of the German botanist Rudolf Schlechter, the species was formally described in 1906 and has since become a staple of carnivorous plant collections worldwide. Its combination of compact size, easy cultivation, prolific flowering, and photographic appeal has made it second only to D. capensis as the most widely grown Drosera species on Earth.

Drosera aliciae, the Alice sundew, is a carnivorous plant in the family Droseraceae. It is native to the Cape Provinces of South Africa, like Drosera capensis, the cape sundew, and is one of the most common sundews in cultivation.

Discovery & Naming

Drosera aliciae was formally described by the German botanist Hans Hamet (also known as Hanstein) in 1906, based on specimens collected in the Western Cape province of South Africa. The specific epithet honors Alice Arnold, wife of the prolific South African botanist Rudolf Schlechter, who collected many of the type specimens during his extensive botanical expeditions across southern Africa in the late 19th and early 20th centuries. Schlechter was one of the most important figures in South African botany, publishing extensively on the Cape flora and describing hundreds of new species from the region. The species was subsequently documented by other Cape botanists including Rudolf Marloth and Harriet Bolus, who noted its occurrence in fynbos bog communities and its morphological distinction from the then-confused Drosera capensis complex. In the modern era, Australian Drosera specialist Allen Lowrie and South African botanists Nick Helme and Ted Oliver have contributed detailed accounts of wild populations and taxonomic clarification. The species entered European cultivation in the early 20th century and became a staple of German, British, and Dutch carnivorous plant collections by the 1920s, subsequently spreading to North American and Asian collections after World War II.

Trapping Mechanism

Each leaf of Drosera aliciae is a passive sticky flypaper trap, but the geometric perfection of its rosette arrangement creates a uniquely efficient capture surface compared to other rosette sundews. Leaves are wedge-shaped (cuneate), 2-4 cm long and 5-8 mm wide at the apex, tapering to a narrow petiole base. Each mature leaf bears 100-200 tentacles — stalked glands consisting of a slender multicellular stalk topped with a rounded head gland that secretes the glistening mucilage droplet. The mucilage is a complex polysaccharide gel (primarily arabinogalactan) with notable adhesive properties — a single droplet can hold an insect weighing several times more than the droplet itself. Upon contact with prey, D. aliciae tentacles undergo two distinct movement phases: rapid tentacle movement (over 10-30 minutes) in which nearby glands bend toward the prey, and slower leaf curling (over 1-6 hours) in which the entire leaf lamina folds inward to bring more tentacles into contact. Peak responses occur in warm conditions (20-25 C) and are triggered both by mechanical touch and by chemical signals (amino acids from prey). Digestion proceeds over 1-5 days, with proteolytic enzymes (including droserin and drosasin) and phosphatases liberating nutrients that are absorbed through the gland heads. D. aliciae's responses are slower but more deliberate than those of D. capensis, and the compact rosette geometry means captured prey is quickly surrounded by multiple adjacent leaves, increasing digestion efficiency.

Native Range & Distribution Map

Distribution map showing the native range of Drosera aliciae.

Biology & Trapping Mechanism

Drosera aliciae is a perennial rosette-forming herbaceous plant with a small fibrous root system and a short inconspicuous stem covered by the leaf bases. Mature rosettes reach 5-12 cm in diameter with 25-40 active leaves; in optimum conditions, a single rosette can produce leaves continuously year-round without significant dormancy. The species is self-compatible and produces abundant inflorescences — scapes rise 20-40 cm above the rosette, each bearing 5-20 magenta-pink to pale-pink five-petaled flowers approximately 1-1.5 cm across. Flowers open sequentially over 3-6 weeks, typically in spring and early summer, and are self-fertile so seeds are produced even without cross-pollination. A single mature plant can produce 500-2000 seeds per flowering event. Seeds are dust-like (less than 0.5 mm), black, and wind-dispersed over short distances. Plants frequently self-seed around mother plants in cultivation, creating dense colonies within a few years. The chromosome number is 2n = 40. D. aliciae is evergreen in warm conditions and does not undergo true dormancy, though growth slows during cool or dry periods. Lifespan in cultivation is typically 3-7 years for individual plants, though genetic lines persist indefinitely through self-seeding.

Prey & Feeding Ecology

Drosera aliciae in the wild primarily captures small flying insects — midges, fungus gnats, fruit flies, small winged ants, and occasional small beetles are typical prey. The species is particularly effective at catching fungus gnats due to its compact rosette form and the strong visual attractant of densely packed glistening tentacles. In cultivation, D. aliciae is one of the most effective biological controls for fungus gnats in houseplant collections — a single mature plant can capture 50-100 gnats per month in indoor conditions. The species does not host specialized phytotelmata fauna because its leaves are not fluid-containing structures, but it does occasionally catch small springtails (Collembola) and thrips. In field studies in South African fynbos bogs, D. aliciae has been shown to derive 30-50% of its foliar nitrogen from arthropod prey, supplementing the negligible nitrogen available in the sandy, acidic, waterlogged substrates where it grows. Prey capture is most intense during warm, humid late summer and autumn months when insect populations peak.

Comparison with Similar Species

Versus D. capensis (Cape sundew, most similar species): capensis has strap-shaped linear leaves on tall upright stems, while aliciae forms a flat rosette of wedge-shaped leaves. Capensis is more vigorous and grows larger; aliciae is more compact and geometric. Versus D. spatulata (common spoonleaf sundew): both are rosette-forming, but spatulata has spoon-shaped leaves and usually less intense red coloration; aliciae's rosette is more perfectly geometric. Versus D. venusta: another South African rosette sundew with similar form but larger leaves and different flower morphology. Versus D. glabripes: another Cape species but with taller more elongated growth and different leaf shape. Choose D. aliciae if you want: a perfectly geometric flat rosette, intense red coloration in high light, easy windowsill cultivation, abundant self-seeding for colonies, beautiful spring flowers, and one of the most photogenic carnivorous plants available.

Reproduction & Propagation

Drosera aliciae is one of the easiest sundews to propagate by multiple methods. Seeds: the most common propagation route — mature plants produce abundant self-fertile seeds during spring flowering; sow on moist peat-sand surface without any covering, germination occurs within 2-4 weeks at 20-25 C, seedlings reach flowering size within 12-18 months. The species is self-compatible, so isolated plants still produce viable seeds. Leaf cuttings: gently pull a mature leaf from the rosette base, lay on moist sphagnum in a sealed container at 20-25 C with bright indirect light; plantlets emerge from the leaf base within 4-8 weeks. Division: mature plants occasionally produce small offset rosettes that can be carefully separated and potted individually. The plant's prolific self-seeding means a single healthy mother plant quickly establishes multigenerational colonies in surrounding pots of compatible carnivorous plants. Tissue culture is practiced commercially by a few specialty labs but is rarely needed because conventional propagation is so reliable.

Cultivation & Substrate

Drosera aliciae is among the easiest sundews in cultivation, often recommended as a first carnivorous plant for beginners. Substrate: pure long-fibered sphagnum moss or a 1:1 mix of peat moss and coarse silica sand. Container: small plastic pot (10-15 cm) sitting in a tray of rainwater or distilled water with 1-2 cm of standing water during the growing season. Light: bright windowsill (south or west-facing) providing 4-8 hours of direct or lightly filtered sun daily; the species develops its famously intense red coloration only under high light (minimum 20,000 lux). Temperature: 15-28 C daytime, 10-20 C night, with tolerance of brief cool nights (down to 5 C) and brief hot days (up to 32 C). Humidity: 50-70% is adequate, making it one of the most tolerant sundews for dry indoor conditions. Water: rainwater, distilled, or RO water only — tap water kills the plant within a few months. Feeding: unnecessary indoors because the plant catches its own prey from available insects; dried bloodworm pieces can be applied to leaves weekly to accelerate growth, but avoid fertilizing the substrate. Repotting: every 2-3 years to refresh substrate, best done in spring.

Common Mistakes to Avoid

['Using tap water — mineral content kills D. aliciae within 2-6 months. Only rainwater, distilled, or RO.', 'Low light — plants in insufficient light turn pale green with minimal dew production. Move to strongest available light.', 'Letting substrate dry out — D. aliciae tolerates brief dryness but extended drought kills the rosette.', 'Fertilizing the soil — burns roots within weeks. Feed leaves directly with bloodworm pieces, never soil.', 'Over-crowding the pot — self-seeding can create crowded colonies that outcompete and weaken the mother plant; thin or repot periodically.']

Seasonal Considerations

As a Mediterranean-climate rosette sundew, D. aliciae follows a modified growth cycle in cultivation. Spring (March-May): flowering season begins; rosettes produce abundant tall flower scapes with magenta-pink flowers lasting 3-6 weeks; seed collection possible after flower wilting; repotting best done just before flowering. Summer (June-August): peak growing season; maintain 1-2 cm tray water depth, strong light, high temperatures (20-28 C); prey capture peaks; feed leaves weekly if desired. Autumn (September-November): growth continues slightly reduced; secondary flowering sometimes occurs; begin reducing tray water as cooler weather arrives. Winter (December-February): the species does not undergo strict dormancy but growth slows significantly; reduce tray water to just moist (no standing water), move to a cooler bright location (10-15 C), protect from frost; the rosette may contract slightly but remains green and functional throughout winter.

Seasonal Care Calendar

Diseases & Pests

Drosera aliciae is remarkably disease-resistant in proper cultivation. Main threats are fungal issues from stagnant, poorly ventilated conditions: Botrytis (gray mold) can attack leaves in cool, wet, still air; Pythium root rot in overwatered substrate at warm temperatures; remove affected tissue and improve air circulation. Aphids occasionally colonize flower scapes; spray with water or pyrethrin. Fungus gnats that become trapped in the tentacles cannot harm the plant but can annoy growers; control with yellow sticky traps or Bacillus thuringiensis israelensis added to the water tray. Scale insects are very rare on this species. The compact rosette form and high light requirement naturally create hostile conditions for most pests and pathogens, making D. aliciae one of the lowest-maintenance carnivorous plants.

Indoor Growing & Terrariums

Drosera aliciae is arguably the best carnivorous plant for indoor windowsill cultivation alongside Drosera capensis. It tolerates typical indoor humidity (40-60%), accepts a range of indoor temperatures (15-28 C), and thrives on a south or west-facing windowsill without supplementary lighting in most climates. Ideal setup: a 12 cm plastic pot containing pure long-fibered sphagnum, placed in a water tray with 1-2 cm of rainwater or distilled water. Position in the brightest available window; if needed, supplement with a small LED grow light above the plant. Top up water as needed to maintain the shallow tray; refresh the tray completely every 2-3 weeks to prevent algae buildup. The plant will catch its own prey from available insects; no feeding necessary. This species is specifically recommended for anyone new to carnivorous plants who wants an attractive, photogenic, and easy-care companion for a sunny windowsill — success rates are extremely high and the plant's geometric beauty is instantly rewarding.

Terrarium Setup

Drosera aliciae does well in both open cultivation and terrarium setups. For terrarium cultivation: use a 20-40 liter glass tank with a partially ventilated lid (not fully sealed) to prevent fungal issues, T5 or LED lighting at 12 hours daily (15,000-25,000 lux at the rosette), substrate of 5 cm peat-sand mix, sphagnum top dressing, and a small water tray at one end. Companion plants in the same conditions: Drosera capensis, D. spatulata, Pinguicula primuliflora, Utricularia livida, and small Sarracenia purpurea (in a corner, tolerant of warmth). The compact geometric rosette of D. aliciae provides a perfect foreground focal point against taller companion plants. Avoid fully sealed terrariums unless ventilation is excellent, as stagnant air can cause fungal issues. Open-air cultivation in a bright window or on a sunny porch (in frost-free conditions) is often preferable to terrariums because it provides better air circulation and stronger light.

Landscape & Bog Garden Use

Depending on climate, Drosera aliciae may be grown outdoors in a bog garden or container water tray during the growing season.

Conservation & Collector Notes

Drosera aliciae is assessed as Least Concern (LC) on the IUCN Red List due to its relatively wide distribution across the Western and Eastern Cape and its abundance in suitable fynbos seepage habitats. However, the Cape Floristic Region as a whole is one of the most threatened botanical areas on Earth — approximately 30% of its natural vegetation has been transformed by agriculture (particularly wine production), urban development around Cape Town, invasive alien plants (Port Jackson willow, Pinus species, Hakea), and altered fire regimes. D. aliciae populations near Cape Town have been locally extirpated by urban expansion and groundwater extraction. Protected areas including Table Mountain National Park, Cederberg Wilderness Area, and Silvermine Nature Reserve support populations. The species is listed on CITES Appendix II for the entire genus Drosera, requiring permits for international trade, though tissue-cultured and seed-grown plants are widely available in the legal trade. South African domestic regulations protect wild collection. The most effective conservation action is to purchase only nursery-propagated plants from reputable sellers with documented provenance and to support Cape Floristic Region conservation organizations such as the Botanical Society of South Africa.

Collector Notes

D. aliciae is widely cultivated and affordable — typical tissue-cultured or seed-grown plants cost 5-15 EUR at most carnivorous plant nurseries, making it one of the most accessible sundews in the hobby. Locality-specific forms from particular Cape populations (Cederberg, Silvermine, Table Mountain) exist and are collected by enthusiasts, though morphological differences are subtle. A few named cultivars exist: 'Giant' or 'Giant Rose' (larger than typical, up to 15 cm rosettes), and various form names used informally in the hobby. The species hybridizes readily with other related Cape Drosera in cultivation, producing plants intermediate between parents; D. 'Andromeda' (D. aliciae x capensis) and similar hybrids are occasionally available. Because the species is so easy and abundant, advanced collectors rarely specialize in D. aliciae, but it remains the gateway species that introduces thousands of new enthusiasts to carnivorous plants every year. Photographers love the species because its geometric rosette and red coloration are ideal subjects for close-up photography.

Ethnobotany & Cultural Significance

Drosera aliciae has limited documented traditional use compared to some other Drosera species. In European herbal medicine, various Drosera species (including D. rotundifolia and D. intermedia) have been used for centuries as ingredients in cough syrups and respiratory remedies, and the active compounds include plumbagin and related naphthoquinones with antimicrobial properties — these compounds are present in D. aliciae as well, though the species has not been specifically used in traditional South African medicine as far as documented. In horticultural history, the species entered European cultivation through German collections in the early 20th century and became widely distributed through the carnivorous plant hobby by the 1960s. Today, D. aliciae is a flagship species for introducing new enthusiasts to carnivorous plants, featured in countless beginner guides, cultivation books, and online tutorials. The species is also popular among photographers and botanical artists because of its geometric beauty and photogenic red coloration. In its native South Africa, the Cape fynbos flora is a source of enormous national pride and D. aliciae is one of many endemic plants featured in local nature reserves and botanical gardens including Kirstenbosch National Botanical Garden near Cape Town.

Frequently Asked Questions