Callopsis volkensii Engl.

• Genus: Callopsis
• Botanical Background: Described by Adolf Engler in 1897, C. volkensii remains the sole representative of its genus and has attracted interest from early African plant explorer.

• Geographical Range: Endemic to high‑elevation cloud forests in eastern Tanzania (Usambara Mountains) and southeastern Kenya.
• Environment: Thrives under constant moisture, cool temperatures (12–20 °C), acidic humus-rich soil, and high humidity (≥70%).

Leaves

• Heart‑shaped, glossy green, 20–35 cm long
• Pronounced pinnate venation and long petioles.

Inflorescence (Spadix & Spathe)

• Small pale green spadix enclosed by a greenish‑white spathe
• Mildly sweet fragrance attracts flies for pollination

Growth Habit

• Terrestrial perennial with a short creeping rhizome; no climbing habit

Light Requirements

• Bright, indirect light
• Avoid direct sun to prevent leaf scorch

Watering & Humidity

• Keep evenly moist but not waterlogged
• Mist regularly or use a humidity tray to maintain ≥70%

Soil & Potting Mix

• Use a loose, well‑draining mix (equal parts peat, orchid bark, and perlite) in a pot with drainage holes

Temperature & Fertilizer

• Ideal range 16–24 °C
• Feed monthly during spring and summer with a balanced diluted fertilizer

Division

• Divide rhizomes in spring, ensuring each section has at least one growing point

Seeds

• Seed production is infrequent in cultivation; germination requires fresh seed sown in moist sterile medium at 20–22 °C

Typical Issues

• Susceptible to mealybugs, spider mites, and root rot from overwatering
• Maintain air circulation and avoid waterlogged soil

Treatment Recommendations

• Organic: Neem oil spray or insecticidal soap for pests
• Chemical: Systemic insecticide for severe infestations
• Disease: Repot in fresh mix and prune affected roots
  

• Unique as the only species in its genus
• Plays an ecological role in montane forest understory by providing habitat for small invertebrates

• Coveted by aroid collectors for its rarity, striking leaf shape, and subtle inflorescence

Wild Population Status

• Likely vulnerable due to habitat fragmentation; no formal IUCN assessment exists

Market Availability

• Extremely rare in commerce
• Occasionally offered by specialist nurseries and plant societies