SVW #4: Beautiful Bugle-Lily
The 4th cache in the series, a small camo-taped tablet pot, is hidden at an obvious spot a few meters off the trail as it continues to gradually ascend the valley through the recovering fynbos across the shrubby, sandy/rocky slopes of Klein Tuinkop,.
For details of the trail, including key waypoints and a map, see GCBKMMH Silvermine Valley Walk #1: Intro, Info and River.
The last two caches in this series cover two common and beautiful flowers which particularly thrive after fires. The first of these is Watsonia borbonica.
Watsonia is a genus of perennial flowering plants in the iris family Iridaceae. This genus which contains about 52 species and is native mainly to South Africa, particularly the Western Cape and surrounding regions of the Cape Floristic Region.
They grow from underground corms and are known for their tall, sword-shaped leaves and striking spikes of tubular flowers that appear in spring or early summer with colours ranging from white and pale pink to deep orange and red.
They are well adapted to the Mediterranean-type climate of the Cape, with cool wet winters and hot dry summers. Many species flower after seasonal rains or disturbances such as fire, which is a natural ecological process in the Fynbos biome. They are commonly found in grasslands, fynbos shrublands, and on mountain slopes.
Because of their showy flowers, they are widely cultivated as ornamental garden plants in many parts of the world. They are attractive to pollinators such as sunbirds and insects and contribute to local biodiversity. Some species have also naturalised outside their native range, particularly in regions with similar climates like parts of Australia and the Mediterranean. Within their native habitats, Watsonias are important components of the diverse Cape flora.
Watsonia borbonica or pyramidata aka the Purple Watsonia, Cape Bugle-Lily or Suurkanol (Afrikaans: sour corm) is one of the most well-known and visually striking species within the genus.
Its Latin species name means ‘from the Ile de Bourbon’ (now Réunion) indicating the plant was thought to (mistakenly) originate from there.
It is native to SW parts of South Africa and is particularly associated with the Western Cape, where it forms a conspicuous part of the spring and early-summer flowering landscape. It occurs naturally within the globally significant Cape Floristic Region, an area renowned for its extraordinary plant diversity and high levels of endemism.
There are 2 subspecies, borbonica and ardernei which differ in the shape and orientation of their stamens and anthers. The latter was named in honour of HM Arderne, the Cape Town businessman whose family established the Arderne Gardens in Claremont. This subspecies is best known for its white form that is well-established in cultivation.
Ironically, only pink-flowered plants are seen in the wild, growing from Paarl, through the Du Toits Kloof Mountains to the Breede River Valley flood plain between Mitchell's Pass and Rawsonville.
It is a robust perennial plant that grows from a corm and can reach 1.5-2m tall. Its long, upright, tough, bright green leaves resemble swords, while the tall flowering stems carry dense spikes of alternately arranged, large tubular flowers, which are mildly scented and usually bright purple-pink to salmon-pink, though colour variations may occur. Flowering generally takes place from late spring into early summer, depending on rainfall patterns and local environmental conditions.
The species is widespread In the Western Cape and most commonly found in fynbos vegetation on open, lower mountain slopes. It thrives in well-drained sandy or loamy soils and benefits from the region’s Mediterranean climate, characterised by winter rainfall and dry summers. Like many plants in the Fynbos biome, it is adapted to periodic fires which help clear competing vegetation and stimulate the regeneration and flowering of many bulbous plants.
It is a key ‘fire ephemeral’ exhibiting massive, synchronized flowering in the first 1-2 years after a fire. It is a quintessential part of the post-fire succession process, often colouring burned mountainsides vibrant shades of pink, mauve, or white.
Ecologically, it plays an important role in supporting pollinator communities. Its tubular flowers are particularly suited to bird pollination, especially by nectar-feeding birds such as the Cape Sugarbird and various sunbird species that are common in the Western Cape. By providing nectar resources during its flowering season, the plant contributes to the functioning of the local bird and insect pollination network.
Abundant flowering after a fire is followed by the production of masses of seed, which increases the number of successful seedlings and provides a major source of food for various rodents.
Beyond its ecological role, it has horticultural importance. Because of its tall flower spikes and attractive colouring, it is frequently cultivated in gardens both within South Africa and internationally. In cultivated landscapes it often performs well in Mediterranean-type climates similar to that of the Western Cape.
However, while the species is native to the Western Cape, it has become naturalised or invasive in some regions outside its natural range, including parts of Australia and New Zealand. In these areas it can spread from gardens into natural ecosystems.
