Origin and Habitat: Amblayo, Salta, Argentina.
Altitude range: 2800-3600 metres above sea level.

• Echinopsis amblayensis (Rausch) Friedrich
• Echinopsis densispina var. amblayensis (Rausch) J.G.Lamb.
• Lobivia amblayensis Rausch
• Lobivia haematantha var. amblayensis (Rausch) G.D.Rowley
• Lobivia haematantha subvar. amblayensis (Rausch) Rausch

• Echinopsis haematantha (Speg.) D.R.Hunt
• Echinocactus haematanthus Speg.
• Lobivia haematantha (Speg.) Britton & Rose
• Echinopsis amblayensis (Rausch) Friedrich
• Echinopsis densispina var. amblayensis (Rausch) J.G.Lamb.
• Lobivia amblayensis Rausch
• Lobivia haematantha var. amblayensis (Rausch) G.D.Rowley
• Lobivia haematantha subvar. amblayensis (Rausch) Rausch
• Echinopsis amblayensis var. albispina (Rausch) Friedrich
• Lobivia amblayensis var. albispina Rausch
• Echinopsis haematantha subs. chorrillosensis (Rausch) J.G.Lamb.
• Lobivia chorrillosensis Rausch
• Lobivia haematantha subs. chorrillosensis (Rausch) Rausch
• Lobivia haematantha var. chorrillosensis (Rausch) Rausch
• Lobivia haematantha subvar. chorrillosensis (Rausch) Rausch
• Echinopsis haematantha subs. elongata (Backeb.) J.G.Lamb.
• Echinopsis elongata (Backeb.) H.Friedrich & Glaetzle
• Lobivia elongata Backeb.
• Lobivia haematantha var. elongata (Backeb.) Rausch
• Echinopsis haematantha subs. hualfinensis (Rausch) J.G.Lamb.
• Echinopsis hualfinensis (Rausch) Friedrich & Glaetzle
• Lobivia haematantha var. hualfinensis (Rausch) Rausch
• Lobivia hualfinensis Rausch
• Echinopsis haematantha subs. hualfinensis f. variegata hort.
• Echinopsis haematantha subs. jasimanensis (Rausch) J.G.Lamb.
• Lobivia haematantha var. jasimanensis Rausch
• Echinopsis haematantha var. kuehnrichii (Frič) J.G.Lamb.
• Andenea kuehnrichii Frič & Kreuz.
• Echinopsis kuehnrichii (Frič) Friedrich & Glaetzle
• Hymenorebutia kuehnrichii (Frič) F.Ritter
• Lobivia cincero Frič in Möller
• Lobivia haematantha subs. kuehnrichii (Frič) Rausch ex G.D.Rowley
• Lobivia haematantha var. kuehnrichii (Frič) Rausch
• Lobivia kuehnrichii Frič in Möller
• Lobivia drijveriana Backeb.
• Hymenorebutia drijveriana (Backeb.) F.Ritter
• Lobivia haematantha var. drijveriana (Backeb.) G.D.Rowley
• Lobivia drijveriana var. astranthema Backeb.
• Lobivia drijveriana var. aurantiaca Backeb.
• Lobivia drijveriana var. nobilis Backeb.
• Lobivia haematantha var. fechseri (Rausch) Rausch
• Lobivia haematantha subvar. fechseri (Rausch) Rausch
• Lobivia hualfinensis var. fechseri Rausch
• Lobivia mirabunda Backeb.

Description: Echinopsis amblayensisSN|12412]]SN|12438]] (best known has Lobivia haematanthaSN|12414]]SN|12414]] var. amblayensis) is a local or morphological form of the very variable Echinopsis haematanthaSN|12412]]SN|12412]] characterized by rich orange-red flowers and green stigmas and now fully synonymized with the latter. It quite is variable and has also received many names. Anyway (whatever the scientific name is) this easy to grow cactus is highly priced for its vibrant orang-red blooms.
Habit: it is a small compact small clustering cactus.
Stem: Black-green with woolly areoles.
Spines: Short, whitish-cream to almost black. thin and spreading.
Flowers: Approx. 5.5 cm long, 4.5 cm in diameter typically orange with a green stigma (but the colour of petals may vary from orange to red and stigmas may also be orange or red).
Blooming season (Europe): Flowers are produced in spring and remain open for about three or four days.
Roots: Tap root.
Remarks: Echinopsis haematanthaSN|12438]]SN|12412]] is a widespread and variable species that has received an undue number of names. The differences usually concern the colour of flowers sometime with a more pink-orange or dark red tint. The colouring, size and density of spines is also quite variable and is greatly influenced by the conditions of culture, at lower light levels the spines are less numerous, delicate and white, while with strong solar radiation the spines are stronger with a darker tint.

Bibliography: Major references and further lectures
1) Nathaniel Lord Britton, Joseph Nelson Rose “Cactaceae: Descriptions and Illustrations of Plants of the Cactus Family” Courier Dover Publications, 1963
2) 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
3) David Hunt, Nigel Taylor “The New Cactus Lexicon” DH Books, 2006 ISBN 0953813444, 9780953813445.
4) Edward F. Anderson “The Cactus Family” Timber Press, 2001
5) Clive Innes, Charles Glass “Cacti” Portland House, 01/May/1991

Cultivation and Propagation: Echinopsis amblayensisSN|12438]]SN|12438]] is a summer grower species that offers no cultivation difficulties.
Soil: Use a very a particularly draining substratum, as it is very sensitive to rottenness when in presence of humidity and low temperatures and let the soil dry out between waterings.
Fertilization: Feed with a high potassium fertilizer in summer.
Repotting: Repot in the spring, when their roots become cramped. Generally, they should be repotted every other year in order to provide fresh soil. After repotting, do not water for a week or more. Needs a large pot to accommodate a large root system.
Water: In summer, during the vegetative period, it must be regularly watered, but allowing the substratum to completely dry up before irrigating again (but do not overwater); in winter, it’s to be kept dry. Preferable not to water on overcast days, humid days or cold winter days.
Exposure: It needs bright sun, but, as a former mountain dweller, does not care for extremely high temperatures in summer.
Hardiness: It is a quite frost resistant cactus, hardy to -5° C. However in cultivation it is better not to expose it to temperatures lower than -0° C, even if in an aerated and protected location, in order to avoid the formation of anti-aesthetic spots on the epidermis. In presence of high atmospheric humidity avoid any frost as it is particularly sensitive to root rot. As these are high-elevation plants, they don't like to get overheated.
Propagation: Direct sow after last frost, grafting or by offsets (if available), provided left drying up well, in summer.