Begonia Varieties: Rex vs. Polka Dot vs. Angel Wing vs. Rhizomatous

First: forget cultivar names, learn the four groups

Botanists divide Begonia into seven horticultural groups based on rootstock and growth habit. Four of those groups dominate the houseplant trade: Rex-cultorum hybrids (rhizomatous root, painted leaves), cane begonias (upright bamboo-like stems — angel wing and polka dot live here), rhizomatous begonias (creeping rhizome at soil level, leaves only), and tuberous begonias (showy flowers, mostly outdoor — rare indoors). Tuberous and the more obscure shrub-type begonias are the houseplant exceptions; the other three are 95% of what shops sell.

This grouping matters because care follows growth habit, not leaf appearance. A Begonia maculata and a Begonia rex 'Escargot' can look like vaguely similar splotchy plants, but maculata wants bright indirect light and tolerates 40% humidity while 'Escargot' wants 50–70% and burns above 10,000 lux. Treating them as one plant — "a begonia" — is the single biggest cause of begonia loss in the first six months.

The 30-second ID flowchart

Look at the stem first, the rhizome second, and the leaves last. Leaf colour overlaps across every group; growth habit does not.

• 1Tall upright bamboo-like stems with visible joints (nodes), asymmetric wing-shaped leaves? → Cane begonia (angel wing or polka dot).
• 2Cane begonia with silver-spotted olive leaves and red undersides? → Begonia maculata ('Wightii' or 'Tamaya') — the polka dot begonia.
• 3Cane begonia with plain green or bronze wing-shaped leaves and pendant red, pink, or white flower clusters? → Angel wing begonia (B. coccinea hybrids).
• 4No tall stems — leaves emerge directly from a thick fleshy rhizome lying on the soil surface? → Rhizomatous begonia (Rex if leaves are showy painted; species rhizomatous if leaves are plainer).
• 5Rhizomatous with leaves heavily marked in silver, pink, purple, red, or black metallic patterns? → Rex begonia (B. rex-cultorum hybrid).
• 6Rhizomatous with green, bronze, or modestly patterned leaves and a large fleshy rhizome that looks almost like a snake? → Species rhizomatous (B. masoniana 'Iron Cross', B. erythrophylla 'Beefsteak', B. cleopatrae).
• 7No rhizome, no cane, but produces large showy flowers from an underground tuber? → Tuberous begonia (mostly outdoor; rare houseplant).

Rex begonias — the painted-leaf group

Rex begonias are hybrids of Begonia rex (a species native to north-eastern India and southern China) crossed with other rhizomatous species over a century of breeding. They are grown for their leaves — flowers are small, pale pink, and largely incidental. Leaves are 10–25 cm across, asymmetrical, often with a spiral whorl at the leaf base, and marked with silver, pink, purple, deep red, or near-black in patterns that look painted. Common cultivars include 'Escargot' (tight silver spiral), 'Fireworks' (purple veins on silver), 'Salamander' (silver leaf with maroon edging), and 'Curly Fireworks' (twisted leaves with purple-black centres).

Rex begonias have a creeping rhizome at soil level and produce leaves directly from it — there is no tall stem. They are the begonia group most sensitive to humidity and most tolerant of low light. A Rex in 5,000–10,000 lux (a north window or a few metres back from an east window) holds its colour; a Rex in direct sun within 24 hours has crispy leaf edges. Humidity below 45% is the second leaf-killer — leaf edges curl and dry within a week. They are the cabinet begonia of choice for collectors. Outside a cabinet, group them with calatheas and run a humidifier nearby.

• ·Rootstock: creeping rhizome on soil surface; no tall stems.
• ·Leaves: 10–25 cm, asymmetric, painted patterns in silver / pink / purple / red / near-black.
• ·Light: 5,000–10,000 lux; burns above 12,000 lux or in direct sun.
• ·Humidity: 50–70% preferred; struggles below 45%.
• ·Common cultivars: 'Escargot', 'Fireworks', 'Salamander', 'Curly Fireworks'.

Polka dot begonia — Begonia maculata 'Wightii'

Begonia maculata is a single species, native to the Atlantic forests of Brazil, and the cultivar 'Wightii' is the polka dot begonia almost every shop carries. Leaves are wing-shaped (asymmetric, longer than wide), 10–20 cm long, olive-green on top with crisp silver-white circular spots, and a deep wine-red underside. The plant is a cane begonia — it grows on tall, upright, bamboo-like stems with visible joints, and a mature plant can reach 1–1.5 m. The flowers are small white clusters held below the leaves; they are pleasant but not the reason anyone owns the plant.

Polka dot begonia is one of the easiest cane begonias for ordinary apartment conditions. It tolerates 40–50% humidity (a 'Wightii' in a 35% winter Nordic flat will drop a few leaves but recover), prefers bright indirect light close to an east-facing window, and likes evenly moist (not soggy) soil. The single common pitfall is leggy growth in low light — without enough lux, internodes (the space between leaves on the stem) stretch to 8–10 cm, which is why so many older 'Wightii' plants look bare-stemmed at the base. Pinch the growing tip every two months in spring and summer to force branching, and the plant stays full. See why is my plant leggy for the broader light-and-stretching pattern.

• ·Species: Begonia maculata; cultivar 'Wightii' (sometimes sold as 'Tamaya').
• ·Stem: tall upright cane with visible joints; reaches 1–1.5 m.
• ·Leaves: wing-shaped, olive-green with silver dots, wine-red underside.
• ·Light: bright indirect; 10,000–15,000 lux is the sweet spot.
• ·Trick: pinch tips every 2 months to keep the plant bushy, not bare-stemmed.

Angel wing begonias — the original cane group

Angel wing is a horticultural label that covers Begonia coccinea and its hybrids — the original cane begonia type, with asymmetric wing-shaped leaves and pendant clusters of red, pink, or white flowers held on long stems. Leaves are larger and less heavily patterned than maculata, often plain green, bronze, or with subtle silver specking. Cultivars vary widely: 'Lucerna' has olive leaves with silver specks and bright red flower clusters; 'Sophie Cecile' is a dwarf with deep pink flowers; 'Looking Glass' has silver-green leaves with red veins. Mature plants can reach 1.5–2 m on a single stem if not cut back, but most growers prune them at 60–90 cm to keep them dense.

Angel wings are slightly more forgiving than polka dot — they handle direct morning sun, tolerate 40% humidity, and flower readily when given enough light. They also flower for nine months a year in the right conditions, which is the practical reason to choose an angel wing over a maculata. The trade-off is that their internodes are longer, so they look gangly without consistent pruning. Cuttings root in water or damp soil within 3–4 weeks — see propagation in water vs soil for the choice between the two.

• ·Species: Begonia coccinea + hybrids ('Lucerna', 'Sophie Cecile', 'Looking Glass').
• ·Stem: cane, jointed, 1–2 m tall if unpruned.
• ·Leaves: wing-shaped, plain green / bronze / silver-flecked.
• ·Flowers: pendant clusters in red, pink, or white — months of bloom.
• ·Light: bright indirect; tolerates direct morning sun.

Rhizomatous begonias — the creeping species

Rhizomatous begonias share Rex's growth habit (creeping fleshy rhizome on the soil surface, no tall stems) but skip the painted-leaf cultivar lineage. The most common species sold are Begonia masoniana ('Iron Cross', with a dark cross-shaped marking on a quilted apple-green leaf), Begonia erythrophylla ('Beefsteak', round leaves with red undersides), and Begonia 'Cleopatra' (bronze-green star-shaped leaves with red veins). Leaves are typically thicker, more textured, and more leathery than Rex hybrids — the plants are bred from species closer to their wild forms.

Care sits between Rex and cane: rhizomatous species tolerate 40–50% humidity (more than Rex, less than maculata), want bright indirect light, and grow slowly. They are excellent houseplants for someone who wants the showy-leaf look without the cabinet maintenance Rex requires. They flower more reliably than Rex too — small pink or white blooms held on tall stalks above the leaves in winter or spring. The rhizome itself is a propagation tool: a 5 cm section laid on damp soil produces a new plant within 4–8 weeks.

• ·Rootstock: thick creeping rhizome on soil surface; no canes.
• ·Common species: B. masoniana ('Iron Cross'), B. erythrophylla ('Beefsteak'), B. 'Cleopatra'.
• ·Leaves: thicker and more leathery than Rex; subtle patterns, not painted.
• ·Humidity: tolerates 40%; happiest at 50%.
• ·Propagation: rhizome cuttings root in 4–8 weeks on damp soil.

Tuberous begonias — rarely indoors, common outdoors

Tuberous begonias (Begonia x tuberhybrida) are the show-flower group — they grow from an underground tuber, produce huge double or single flowers in red, orange, yellow, pink, or white, and go fully dormant in winter. They are mostly outdoor or conservatory plants in temperate climates; in Nordic summers they are common in patio containers and hanging baskets. Indoors year-round they fail because heated apartments do not supply the cool dormancy (8–12 °C for 10–12 weeks) the tuber needs to push the next year's growth.

If you bought what looks like a begonia in a garden centre with massive showy flowers and want it indoors long-term, it is almost certainly a tuberous type. Treat the first season as a single bloom run, dig and dry the tuber in autumn, store cool over winter, and replant in spring. A long-term indoor flowering begonia is much more easily a Rieger or angel wing than a tuberous.

Care is similar but humidity diverges

Every houseplant Begonia wants the same framework: bright indirect light (no direct midday sun for Rex; tolerated by canes), evenly moist soil that drains in seconds (a peat-based mix with extra perlite at 25–30%), and consistent warmth (18–24 °C). Soggy soil rots the rhizome or cane base within a week, so watering is a top-2-cm-dry routine — see how often to water houseplants for the finger-test cadence.

Humidity is where the groups diverge. Rex begonias need 50–70%; cane begonias (maculata, angel wing) tolerate 40–50%; rhizomatous species sit between. The fastest way to lose a Rex is to put it in a heated winter Nordic flat without a humidifier — leaves brown-edge in a week. All Begonias also dislike cold drafts and sudden temperature swings; a sill that drops to 12 °C overnight in winter can take out the entire canopy on a maculata.

All Begonias are toxic to pets

Every Begonia species contains soluble calcium oxalates and glycosides, particularly concentrated in the underground rhizome or tuber. Chewed by a cat, dog, or child, the leaves cause mouth and throat irritation, drooling, and vomiting; the rhizome can cause more severe symptoms. The ASPCA lists all Begonia species as toxic to cats, dogs, and horses. Reactions are usually self-limiting from leaf chews but can be more serious if a pet digs up a tuber or rhizome.

If you have a cat that chews plants, every begonia on this page is on the wrong list. See our pet-toxicity guide for the full catalogue and pet-safe houseplants for cats and dogs for non-toxic alternatives that hit a similar painted-leaf brief — Calathea is the closest visual substitute for Rex.

Common nursery mislabels

Begonia labelling varies wildly between shops, and several common mismatches send beginners home with the wrong plant.

• ·"Polka dot begonia" without a species name is almost always Begonia maculata 'Wightii' — but occasionally refers to the unrelated Hypoestes phyllostachya (polka dot plant), which is not a begonia at all.
• ·"Begonia maculata" sold as a small leafy plant with no canes is usually a young 'Wightii' that has not yet pushed its tall stems — it will, within a year of good light.
• ·"Rex begonia" is almost always a cultivar (Rex-cultorum hybrid) rather than the wild Begonia rex species; the cultivar is what's sold.
• ·"Iron Cross begonia" is Begonia masoniana, a rhizomatous species — not a Rex, despite the showy leaf.
• ·Any begonia tagged "angel wing" with no species name is a Begonia coccinea hybrid; cultivar names like 'Lucerna' or 'Sophie Cecile' confirm the angel wing group. Run the photo through a plant ID app before paying for an unlabelled cane begonia.

Choosing the right begonia

If you want a forgiving begonia for an ordinary apartment with 40–50% humidity, start with Begonia maculata 'Wightii' or an angel wing hybrid like 'Lucerna'. Both tolerate the conditions most homes actually have, look dramatic, and propagate easily from cuttings. If you want the painted-leaf Rex look and will run a humidifier, 'Escargot' is the most readily available and most forgiving Rex cultivar — slower than canes but far more visually striking. If you have a low-light apartment and want a begonia that holds up, Begonia masoniana 'Iron Cross' is the best rhizomatous starter — leathery leaves, slow growth, and reasonable humidity tolerance.

Skip begonias entirely if you have cats or small children who chew plants. The toxicity is well documented and there is no truly pet-safe begonia. For the painted-leaf look in a non-toxic plant, Calathea and Maranta hit the same visual brief.