Arum apulum (Carano) P.C.Boyce

• Genus: Arum
• Botanical Background: The species has attracted attention from botanists specializing in Araceae, including P.C. Boyce, who contributed to its modern classification. Early descriptions were based on limited regional collections from Apulia.

• Geographical Range: Found in Apulia region in Italy. It is typically found in rocky outcrops and forest margins within Mediterranean landscapes.
• Environment: Arum apulum thrives in well-drained, limestone-rich soils. It prefers environments with moderate to high humidity and experiences a seasonal climate marked by warm, dry summers and mild, wet winters.

Leaves

• Broadly arrow-shaped with a leathery texture
• Rich green color
• Subtle veining

Inflorescence (Spadix & Spathe)

• Contrasting spathe that can vary from green to a muted brownish hue
• Central spadix that attracts pollinators
• Scent is generally mild, it plays a role in luring specific pollinating insects

Growth Habit

• Grows terrestrially with a robust rhizome system that helps it survive the Mediterranean summer drought
• Forms clumps that gradually expand in its native habitat

Light Requirements

• Bright, indirect light
• Can tolerate partial shade, which mimics its native woodland edge conditions

Watering & Humidity

• Regular watering is advised during the growing season
• Soil should be allowed to dry between waterings
• Benefits from moderate humidity, especially during spring and autumn

Soil & Potting Mix

• A well-draining, mineral-rich potting mix with added limestone chips
• Containers should have ample drainage to replicate its natural rocky environment

Temperature & Fertilizer

• Ideal temperatures range from mild to warm, reflecting the Mediterranean climate
• Balanced liquid fertilizer during the growing season with reduced feeding in winter

Division and Cuttings

• Propagation is most effectively achieved by dividing the rhizomes during the dormant season. Ensure that each division has sufficient roots

Seeds

• Require a period of stratification to germinate. The process can be more challenging than vegetative propagation

Typical Issues

• Infestations by spider mites
• Occasional fungal root rot, particularly if overwatering occurs

Treatment Recommendations

• Maintaining proper drainage and organic insecticidal soap help prevent infestations
• In cases of pest issues, organic insecticidal soap

• Appropriate fungicides are recommended for treating root rot.

• Local folklore in the Apulia region sometimes links Arum apulum to traditional medicinal practices and seasonal celebrations
• Its distinctive appearance has made it a subject of interest among regional botanists

• Prized for its unusual leaf shape and ornamental inflorescence
• It is particularly valued in rock gardens and collections that focus on Mediterranean flora

Wild Population Status

• Due to its limited geographical range, there are conservation concerns regarding habitat loss in the Apulia region

Market Availability

• Relatively rare in cultivation and is sought after by dedicated collectors
• Not widely available in mainstream nurseries and is often distributed through specialist growers