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Rat Tail Cactus
Scientific Name: Disocactus flagelliformis (L.) Lem.
Synonym: Cereus flagriformis, Aporocactus flagelliformis var. leptophis, Aporocactus leptophis, Aporocactus flagriformis, Aporocactus flagelliformis, Cereus flagelliformis, Cactus flagelliformis, Cereus leptophis
Family: Cactaceae
Rat Tail Cactus (Disocactus  flagelliformis) Recommended Temperature Zone:
USDA: 10-12

Frost Tolerance: Keep above 35F (3C), does not tolerate any frost.

Minimum Avg. Temperature: 50F (10C)

Heat Tolerance: Protect from direct sun, does better inside

Sun Exposure: Light shade to shade, if any direct sun, morning sun only.

Origin: Highland plateaus of Mexico (Oaxaca, Hidalgo), but cilutivated throughout Latin America

Growth Habits: Epiphytic cactus, with long hanging stems, up to 4 feet long (120 cm) or more, up to 1 inch thick (2.5 cm); 7 to 14 ribs; 15 or more yellow spines per areole.

Watering Needs: Keep the soil mixture moist all the time. Water abundantly in summer. Needs good drainage

Propagation: Cuttings that bloom in 2-3 years, or seeds

The plants found as "Aporocactus flagriformis", have wider stems, 0.4 to 1 inch in diameter (1-2.5 cm); 7 to 12 ribs, 4 to 5 central spines, and 6 to 8 radials.
Aporocactus leptophis has stems 0.3 to 0.4 inch in diameter (7-10 mm); 7 or 8 ribs; 9 to 14 radials.

Rat Tail Cactus (Disocactus  flagelliformis)

Cultural Practices:
The name 'Aporocactus' comes from the Greek for "Cactus that is not penetrable".
This cactus is epiphytic in the wild (it grows in trees). It is perfectly adapted to hanging baskets. Use normal potting soil, it likes an acid soil. Morning sun is ideal.
. The Aporocactus is sensitive to scales and mealybugs. Because of the density of the spines and the fact that it is not always possible to get a good look at a hanging plants, most infestations get overlooked. It is a good idea to make a point to check regularly. The only recourse is to use a systemic insecticide.

Blooming Habits:
The bright pink flowers 1.5 inches long, 2.5 inches wide (4 by 6 cm), are produced along the stems, in spring and summer are sometimes followed by small red fruits. In the wild, they are pollinated by hummingbirds, but in cultivation, they generally need to be hand pollinated.

Fruiting Habits:

Stems can be cut, let dry for a few day so that the cut starts healing, and replanted. The best time to do it is in early summer.

Check for Field Collection numbers at Ralph Martin's Site

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