Fragrant Prickly Apple

“Rarity, as geology tells us, is the precursor to extinction.” What Charles Darwin noted in his work On the Origin of Species from 1859, highlighting how species with fewer individuals are more vulnerable to environmental changes or predators, is especially true for geographically isolated species, known as endemism. These species occur only in single geographical locations and are typically highly specialized in their respective habitat needs.

The Fragrant Prickly Apple (Harrisia fragrans), a unique cactus endemic to Florida’s east coast, is one of these rare plants that could soon disappear if conservation efforts come too late. Habitat loss and destruction, as well as invasive species like Brazilian Pepper or Guinea Grass have led to its classification as endangered, although no historical data exists to link it to a particular habitat prior to the introduction of pineapple farming in 1879. Today, Fragrant Prickly Apple occurs naturally only in a few fragmented coastal hammock and coastal sand pine scrub locations in only a few counties. One of the most remarkable characteristics is its striking white, night-blooming flower that emits a sweet fragrance before it develops into a bright orange, edible fruit.

While propagation from seed is relatively easy, finding the right location for planting this cactus can be a goldilocks task. Planted in full sun, the young cacti easily become desiccated, but too much moisture and shade can cause rot. The author recommends planting it in a well-drained place with dappled sunlight and in close proximity to a companion plant like a tree or shrub that supports its cylindrical stems which can grow up to 2 meters long. A thin layer of loose leaf- or pine needle mulch, typical in sand pine scrub or coastal hammocks, allows the plant to reproduce by seed, which are presumably spread by small animals like birds.

What Charles Darwin identified as the precursor to extinction can also be a sign of high biological diversity and ecological quality in an area. Therefore, endemism should be seen as a priceless natural heritage which deserves protection that takes the entire habitat into consideration, rather than a predetermined outcome. It all depends on our perspective. Next time you visit the Environmental Learning Center, enjoy this beautiful cactus along the walking trails and support our mission to educate about Florida’s natural heritage.