Origin and Habitat: Garden origin (Nursery produced cultivar)

• Echinopsis subdenudata f. cristata hort.

• Echinopsis ancistrophora Speg.
• Cereus pasacanus (F.A.C.Weber ex Rümpler) F.A.C.Weber
• Mesechinopsis ancistrophora (Speg.) Y.Itô
• Pseudolobivia ancistrophora (Speg.) Backeb. ex Krainz
• Echinopsis ancistrophora var. hamatacantha (Backeb.) Rausch
• Echinopsis hamatacantha Backeb.
• Mesechinopsis hamatacantha (Backeb.) Y.Itô
• Pseudolobivia hamatacantha (Backeb.) Backeb.
• Echinopsis ancistrophora var. megalocephala (Rausch) Rausch
• Echinopsis rauschii var. megalocephala Rausch
• Lobivia calorubra var. megalocephala (Rausch) Rausch
• Echinopsis ancistrophora var. polyancistra (Backeb.) Rausch
• Echinopsis polyancistra Backeb.
• Mesechinopsis polyancistra (Backeb.) Y.Itô
• Pseudolobivia polyancistra (Backeb.) Backeb.
• Echinopsis ancistrophora var. rubriflora Rausch
• Echinopsis leucorhodantha Backeb.
• Mesechinopsis leucorhodantha (Backeb.) Y.Itô
• Pseudolobivia leucorhodantha (Backeb.) Backeb. ex Krainz
• Echinopsis lobivioides Backeb.
• Echinopsis pelecyrhachis var. lobivioides (Backeb.) H.Friedrich
• Lobivia grandiflora var. lobivioides (Backeb.) Rausch
• Mesechinopsis lobivioides (Backeb.) Y.Itô
• Pseudolobivia lobivioides Backeb. ex Krainz
• Pseudolobivia pelecyrhachis var. lobivioides (Backeb.) Backeb.
• Echinopsis pelecyrhachis Backeb.
• Mesechinopsis pelecyrhachis (Backeb.) Y.Itô
• Pseudolobivia pelecyrhachis Backeb. ex Krainz
• Echinopsis subdenudata Cárdenas
• Echinopsis subdenudata f. cristata aurea hort.
• Echinopsis subdenudata f. cristata hort.

• Echinopsis ancistrophora subs. arachnacantha (Buining & F.Ritter) Rausch
• Echinopsis arachnacantha (Buining & F.Ritter) H.Friedrich
• Lobivia arachnacantha Buining & F.Ritter
• Echinopsis ancistrophora var. densiseta (Rausch) Rausch
• Echinopsis arachnacantha subs. densiseta (Rausch) M.Lowry
• Echinopsis arachnacantha var. densiseta (Rausch) Friedrich
• Lobivia arachnacantha var. densiseta Rausch
• Echinopsis ancistrophora var. kratochviliana (Backeb.) Rausch
• Echinopsis kratochviliana Backeb.
• Neolobivia kratochviliana (Backeb.) Y.Itô
• Pseudolobivia kratochviliana Backeb.
• Echinopsis ancistrophora var. sulphurea (R.Vásquez) Rausch
• Echinopsis arachnacantha subs. sulphurea (R.Vásquez) Lowry
• Echinopsis arachnacantha var. sulphurea (R.Vásquez) G.D.Rowley
• Lobivia arachnacantha var. sulphurea R.Vásquez
• Echinopsis ancistrophora var. torrecillasensis (Cárdenas) Rausch
• Echinopsis arachnacantha subs. torrecillasensis (Cárdenas) M.Lowry
• Echinopsis arachnacantha var. torrecillasensis (Cárdenas) Friedrich
• Echinopsis torrecillasensis Cárdenas
• Lobivia arachnacantha var. torrecillacensis (Cárdenas) Buining
• Pseudolobivia torrecillasensis (Cárdenas) Backeb.
• Echinopsis arachnacantha var. vallegrandensis Rausch

• Echinopsis ancistrophora subs. cardenasiana (Rausch) Rausch
• Echinopsis cardenasiana (Rausch) Friedrich
• Lobivia cardenasiana Rausch

• Echinopsis ancistrophora subs. pojoensis (Rausch) Rausch
• Lobivia calorubra var. pojoensis (Rausch) Rausch
• Lobivia pojoensis Rausch
• Echinopsis ancistrophora var. grandiflora (Rausch) Rausch
• Echinopsis rauschii var. grandiflora (Rausch) H.Friedrich
• Lobivia pojoensis var. grandiflora Rausch

Description: This is a very nice crested Echinopsis, easily recognizable for its almost spineless body.
Stem: Very fat (quite large for a crested plant ( 8 to 20 cm thick) it can form in age a huge convoluted mound.
Spines: absent
Flowers: These cacti produce gorgeous, night-blooming, white funnel-shaped, fragrant flowers with long tubes 15-22 cm long. Old plant may have many flowers at a time. This species blooms from late spring to all summer long, the flowers open on the morning of the first day and remain opened all the night long but last only one day in full beauty, at the second day they start to wither.

Notes: The cause of cresting: The cause of cresting is not fully explained. Biologists disagree as to why some plants grow in this unusual form. Some speculate that it is a genetic mutation. Others say it is the result of a strike of lightning or freeze damage, but whatever the stimulus, the growth point of the stem has switched from a geometric point, to a line, which folds and undulates as the crest expands. Though these crested Echinocactus subdenudata are very rare, cresting occurs naturally, and can be encountered in many other cactus species.

Bibliography: Major references and further lectures
1) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
2) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011

Cultivation and Propagation: The grafted plants are easy to grow and will form a large brain-like mounds with age. Watering during the active growing season (spring and summer); this will encourage steady growth, and prevent the large tubercles from becoming flabby.
The plants on their own roots do well under cultivation. Use very draining soil, water during the aestival growth cycle (They need plenty of water), but need to be avoided wetting the bodies of these plants while they are in sunlight. A wet cactus in the sun light can cause sun burning which can lead to scars or even fungal infections and death.
Need half sun. Keep dry at 10°C in winter, but they can tolerate sporadic light frost.
Propagation: Grafting or stem cutting.