glochid

A glochid is a small, barbed, hair-like spine found on the areoles of certain cacti, most often in Opuntia species (prickly pears) and Cylindropuntia species (chollas). Glochids are typically very short and slender, bearing minute backward-facing barbs. They detach readily from the plant when touched or brushed, and can cling to skin, eyes, or clothing.

Glochids differ from the plant’s larger spines in their size, delicate structure, and ease of shedding. They occur in tufts within the areoles and can penetrate the outer layers of skin or mucous membranes, sometimes causing itching, irritation, redness, or a prickling sensation. Their dispersal can occur through handling, brushing against the plant, or contact with contaminated clothing or gear.

Handling and safety considerations are common in horticulture and outdoor activities. Protective gloves and long sleeves are recommended when working with Opuntia or Cylindropuntia plants. If contact occurs, avoid rubbing the affected area. Glochids can often be removed with clean tweezers for larger particles, and by applying gentle adhesive tape to lift finer particles from the skin. Afterwards, wash the area with soap and water. If glochids contact the eye, rinse with clean water or eye irrigation and seek medical attention if irritation persists or if there is significant discomfort or vision change.