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Forest Boer-bean

Schotia latifolia

SA tree no: 204

English: Forest Boer-bean, Bush Boer-bean, Broad-leaved Schotia

Afrikaans: Bosboerboon, Boerboontjie, Waboombos, Breedblaar-boerboon

Xhosa: umGxam, umXamo

Zulu: umGxamu

Historical scientific names: Schotia speciosa, Schotia cuneifolia

Schotia latifolia, commonly known as Forest Boer-bean or Bosboerboon, is a beautiful indigenous evergreen to semi-deciduous small to medium-sized tree native to the coastal and inland forests and bushveld of the Eastern Cape and KwaZulu-Natal provinces of South Africa. It is highly valued for its dense, glossy dark green foliage, magnificent clusters of delicate, cream to pinkish-red flowers, and its characteristic hard, woody seed pods. This hardy and attractive tree is an excellent choice for a shade tree, specimen tree, or screening plant in a range of garden settings, providing significant ecological benefits by attracting birds and insects.

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Distinguishing features:

A small to medium-sized evergreen to semi-deciduous tree with a dense, rounded crown.
Features distinctive, broadly ovate or elliptic, glossy dark green leaflets with prominent veining.
Produces showy, delicate, cream to pinkish-red flowers in dense, rounded clusters.
Flowers are rich in nectar, often "weeping" from the tree, attracting many birds and insects.
Bears flattened, woody, dark brown seed pods that persist on the tree for a long time.
Seeds are edible when roasted or boiled.

Overall appearance:

Schotia latifolia presents as a shapely tree with a dense, rounded canopy of lush, glossy foliage. When in bloom, it is transformed by a magnificent display of delicate flowers, and its persistent, woody pods add year-round character, making it a focal point in any garden.

Height:

Typically grows 4 to 12 metres tall, but can reach up to 15 metres in sheltered forest environments.

Width:

Forms a dense, spreading crown, usually 3 to 8 metres wide.

Leaves:

Pinnately compound, alternate, relatively large, typically 7–15 cm long.
Composed of 2 to 5 (most commonly 3 or 4) pairs of opposite or sub-opposite leaflets.
Leaflets are broadly ovate to elliptic or obovate, relatively large, 3–9 cm long and 1.5–5 cm wide.
They are thick, leathery (coriaceous), and glossy dark green on the upper surface, paler beneath, with prominent venation.
Margins are entire (smooth) and often wavy.
New growth often has a reddish or bronze tint.

Flowers:

Showy, delicate, bell-shaped, 1–2 cm long, ranging in colour from cream to pale pink or reddish-pink, often with a hint of green.
Borne in dense, many-flowered, rounded clusters (panicles) up to 15 cm long, produced at the ends of branches or in leaf axils.
They are rich in nectar, which often drips from the flowers, attracting pollinators.

Flowering season:

Flowers mainly in late winter to spring, typically from July to October, but can sometimes extend into early summer.

Fruits:

Flat, woody, oblong pods, 6–15 cm long and 3–5 cm wide.
Initially green, ripening to a dark brown or reddish-brown.
They are very hard and persistent, often remaining on the tree for many months after ripening.
They split open along one seam (indehiscent or tardily dehiscent) to release the seeds.

Seeds:

Flat, disc-shaped to roundish, dark brown to black, typically 1.5–2.5 cm in diameter, with a distinctive, fleshy, yellow aril (a small appendage) at one end.

Bark:

Smooth and grey on younger stems, becoming rougher, fissured, and darker brown or greyish-black with age. Sometimes peels in plates.

Stems:

Relatively sturdy, upright branches forming a well-structured crown. Young branches are smoother and often a pale grey-green.

Wood:

The wood is hard, dense, and durable, often reddish. Historically used for wagon parts, yokes, and general carpentry, but not commercially significant today.

Roots:

Possesses a strong, non-invasive root system, making it suitable for planting closer to structures.

Soil type:

Prefers well-drained, fertile soils but is highly adaptable to a range of soil types, including sandy loam and clay. It tolerates nutrient-poor soils.

Aspect:

Thrives in full sun to partial shade. It is moderately drought-tolerant once established and reasonably frost-hardy, tolerating light to moderate frost. It is well-suited to coastal conditions, tolerating some salt spray and wind.

Edibility:

The seeds are edible. They can be eaten fresh (though sometimes bitter), or roasted and ground into a meal, or boiled. The yellow aril is also edible and sweet.

Toxicity:

Considered non-toxic. The seeds are edible.

Uses:

Ornamental Tree: An excellent small to medium-sized ornamental tree for gardens of all sizes, street planting, and parkland. Its dense shade, glossy foliage, and spectacular flowers make it a highly desirable feature.
Wildlife Attractor: The nectar-rich flowers attract numerous bird species (especially sunbirds) and insects (butterflies, bees), making it excellent for biodiversity. The seeds are also eaten by birds and small mammals.
Edible Plant: The seeds (often referred to as 'boer-beans') and their arils are edible and have been a traditional food source for indigenous people.
Shade Tree: Its dense canopy provides good shade, making it suitable for patio or garden seating areas.
Screening: Can be planted to form a dense screen or informal hedge.
Traditional Uses: Traditionally, the bark and roots have been used in various medicinal preparations.

Ecology:

Pollination: The nectar-rich flowers are primarily pollinated by birds (ornithophily), particularly sunbirds, and various insects including bees and butterflies.
Seed Dispersal: Seeds are primarily dispersed by birds and small mammals that consume the aril-covered seeds.
Butterfly Host: Larvae of the Brown Playboy butterfly (Deudorix antalus) feed on its leaves.
Browse: Leaves are browsed by various herbivores, including kudu and other antelope in the wild.

Distribution and habitat:

Schotia latifolia is endemic to South Africa.

South African Provinces: Eastern Cape, KwaZulu-Natal.
Habitat: Found chiefly in coastal forests, evergreen forests, dune forests, riverine bush, and dry bushveld. It often grows in deep, well-drained soils, sometimes on rocky outcrops.

Derivation of name:

The genus name Schotia honours Richard van der Schot (died 1825), who was the chief gardener of the Imperial Garden at Schönbrunn in Vienna.
The species epithet latifolia is Latin for "broad-leaved," referring to its relatively broad leaflets compared to other Schotia species.
Common names like "Forest Boer-bean" and "Bosboerboon" (Afrikaans for forest farmer's bean) refer to its forest habitat and its edible seeds.

Historical aspects:

Schotia latifolia has been a significant plant in the traditional diets and ecosystems of South Africa for centuries. Its edible seeds were a valued food source. It is well-documented in early botanical expeditions and has long been appreciated for its beauty in cultivation.

Interesting facts:

This "Forest Boer-bean" is a true beauty, especially when its branches burst into clusters of delicate, almost glowing, cream to pinkish-red flowers – it's quite a sight!
Just like its cousin, the Karoo Boer-bean, this tree's flowers produce so much sticky nectar that it often drips onto the ground below, attracting loads of birds and insects for a sweet treat.
While its leaves are typically broad, the young new growth often emerges with a lovely reddish or bronze tint, adding another layer of colour to this already attractive tree.

Growing tips:

Propagation: Best propagated from fresh seeds. Seeds have a hard coat and benefit from scarification (e.g., nicking the coat with nail clippers) or soaking in warm water overnight to aid germination. Sow in well-drained, sandy loam. Germination can be relatively quick.
Planting: Prefers a sunny to partially shaded position and well-drained, fertile soil. It establishes well in a range of garden settings.
Watering: Water regularly for the first year or two to establish a strong root system. Once established, it is moderately drought-tolerant but benefits from occasional deep watering during prolonged dry periods.
Frost: Moderately frost-hardy. Young plants may need protection from severe frost. Established trees can withstand light to moderate frost.
Maintenance: Relatively low maintenance. Prune only to shape, remove dead or damaged branches, or to lift the crown. It is a slow to medium-growing tree.
Pests/Diseases: Generally robust. Young foliage might occasionally be susceptible to aphids; use an environmentally friendly insecticidal soap if needed.

Note:

The pink blooms that are its most distinctive feature help us tell this plant apart from its close relatives, the Weeping Boer-bean (Schotia brachypetala), the Dwarf Boer-bean (Schotia capitata), and the Karoo Boer-bean (Schotia afra) which usually have scarlet flowers.

Schotia latifolia and Schotia brachypetala can be tricky to distinguish when not in bloom, but here's a breakdown of other key differences to help you tell them apart:

Leaflets: S. latifolia usually has fewer leaflets per leaf (3-5 pairs) compared to S. brachypetala (4-7 pairs). So, count the leaflets!
Overall Size and Shape: S. latifolia can be a smaller tree, especially when growing in dry conditions (up to 3m), while S. brachypetala is usually larger (10-20m, sometimes up to 30m). S. latifolia tends to have a more rounded crown, while S. brachypetala can have a broader, more spreading crown.
Pods: While both have similar pod shapes (broad, flat, woody), the pods of S. latifolia tend to be broader.
Habitat: S. latifolia is found in forests and forest margins, scrub, and bushveld, while S. brachypetala is more commonly found in woodlands and along riverbanks.
Flowering Time: While both flower in spring and early summer, S. brachypetala often flowers a bit earlier than S. latifolia.

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