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Echinopsis ancistrophora ssp. arachnacantha
Scientific Name: Echinopsis ancistrophora ssp. arachnacantha (Buining & Ritter) Friedrich
Synonym: Lobivia arachnacantha, Echinopsis arachnacantha, Pseudolobivia arachnacantha
Family: Cactaceae
Echinopsis  ancistrophora ssp. arachnacantha Recommended Temperature Zone:
sunset: 16, 17, 21-27
USDA: 9b-12

Frost Tolerance: Hardy to 25F (-4C), for short periods, some clones are hardy to lower temperatures

Minimum Avg. Temperature: 50F (10C)

Heat Tolerance: Light shade in Phoenix

Sun Exposure: Full sun to light shade

Origin: Bolivia

Growth Habits: Clusters freely, each head is up to 1.5 inches (4 cm)

Watering Needs: Regular water in spring to fall


The species name "arachnacantha" comes from the Greek for "with spider web-shaped thorns". This cactus still generally encountered under its older Lobivia arachnacantha name is a good beginner cactus. It is quite resistant and accasionally gets covered by bright yellow blossoms, that will attract even a non-cactophile spouse.

Echinopsis  ancistrophora ssp. arachnacantha

As Lobivia arachnacantha var. densiseta at the HBG (HBG 75774)

Blooming Habits:
The large 2 inches wide yellow flowers open during the day.

Fruiting Habits:

Requires to be kept below 45F (7C) in winter to flower well in the spring

Check for Field Collection numbers at Ralph Martin's Site

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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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