Ariopsis peltata Nimmo

• Genus: Ariopsis
• Botanical Background: Sescribed by Nimmo and published in Catalogue Plantarum Bombay (J. Graham) in 1839, this species has been accepted since that original treatment; for much of its history A. protanthera was considered a morph of A. peltata, but recent work distinguishes them as separate species.

• Geographical Range: Endemic to the Western Ghats of southwest India.
• Environment: Thrives in wet tropical understories with high humidity, well‑drained lateritic soils, and consistent monsoon rainfall.

Leaves

• Typically one or two peltate

• Orbicular leaves per growth cycle; each 5–9 cm across

• Membranous and glabrous

• Borne on slender petioles up to 8 cm long

Inflorescence (Spadix & Spathe)

• Spathe yellow or white
• About 3 cm long and cymbiform
• Spadix cylindrical (≈2.5 cm long, 3 mm thick)
• Bearing 5–7 female flowers on the lower side

Growth Habit

• Terrestrial or occasionally epiphytic annuals with a globose rootstock (tuber) up to 1 cm across

Light Requirements

• Bright, indirect light mimicking forest understory shade

Watering & Humidity

• Keep substrate evenly moist but not waterlogged
• Maintain high humidity (60–80%)

Soil & Potting Mix

• Free‑draining mix of peat moss, perlite, and orchid bark to ensure aeration around the tuber

Temperature & Fertilizer

• Maintain warm temperatures (above 15 °C)
• Fertilize lightly with a balanced indoor‑plant fertilizer during active growth
• Reducing feed in dormancy

Division and Cuttings

• Best propagated by dividing the tuberous rootstock in early growth season

Seeds

• Seed propagation is uncommon due to slow germination
• Require warm (25–30 °C), moist, shaded conditions and may take several weeks to sprout

Typical Issues

• Common pests such a mealybugs, spider mites and thrips
• Root rot can occur if watering is excessive or drainage is poor

Treatment Recommendations

• Wipe leaves with water or apply insecticidal soap/neem oil for pests
• Improve drainage and reduce watering to prevent rot

• Genus name “Ariopsis” means “like Arum”
• Specific epithet “peltata” refers to the shield‑like leaf shape

• Valued by collectors for its compact form and distinctive peltate foliage
• Uncommon in general trade but sought by Araceae enthusiasts

Wild Population Status

• Limited assessment of its wild population
• Habitat loss remains a potential concern

Market Availability

• Relatively rare in the horticultural trade and is typically available only through specialized nurseries or botanical collection