Identifying Plectranthus: Square Stems Mean Mint Family

Your photo shows a Plectranthus—often mistaken for a legume due to flower shape, but the square stems reveal its true identity: the mint family (Lamiaceae).

Likely Species

Plectranthus ciliatus (fall-blooming spur flower) matches your image. Several cultivars exist. A close relative, P. zuluensis, is sometimes considered the same species—taxonomists debate this.

Alternative Possibility

If the foliage is silvery-gray rather than green with purple undertones, it's likely P. argentatus (silver spur flower), grown primarily for its striking leaves.

Key Identification Features

• Square stems (mint family hallmark)
• Opposite leaves
• Spur-shaped flowers in racemes
• Fall blooming period
• Tender perennial, often grown as annual/houseplant

Without seeing foliage, P. ciliatus is the best match for your flower photo. These make excellent shade-tolerant container plants with late-season blooms.