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Echinopsis subinermis

Spineless Hedgehog Cactus

Echinopsis subinermis, described by R.E.Fr., is a species of cactus belonging to the Cactaceae family, native to South America, specifically with a natural distribution in Bolivia and northwestern Argentina 1. Its name "subinermis" is derived from Latin, meaning "almost spineless," which is one of the species' defining characteristics. The plant typically grows in a globular or slightly columnar form and can gradually create small colonies. Its stem is dark green, featuring prominent and rounded ribs, usually numbering 8 to 14. Its areoles are generally small, sparse, and nearly spineless, giving it a smooth appearance .

Echinopsis subinermis is notable for its large, funnel-shaped, bright yellow flowers that bloom from late spring to summer. The flowers typically open at night and last for only one day, but the plant can produce successive blooms under suitable conditions. Its fruits are small, round, and hairy 2. In its natural habitat, it is usually found in high-altitude, semi-arid regions, on rocky slopes or among shrubs. This species is quite popular among cactus collectors due to its aesthetic appeal and relatively easy care, and it is widely cultivated as an ornamental plant 3.

References

  1. R.E.Fr. "Echinopsis subinermis". The International Plant Names Index. Accessed: 2024-05-27. https://www.ipni.org/n/77114670-1 ↩
  2. Anderson, Edward F. "The Cactus Family." Timber Press, 2001. ISBN: 978-0881924985. ↩
  3. Preston-Mafham, Rod and Ken. "Cacti: The Illustrated Dictionary." Cassell, 1997. ISBN: 978-0304340332. ↩
Light

Full Sun

Abundant sunlight is critical for healthy growth and flowering. Insufficient light can lead to etiolation.

Watering

Measured

Ensure the soil completely dries out between waterings. Overwatering is the most common cause of root rot.

Soil

50% mineral (pomza, lav kırığı, perlit), 30% torf/coco coir, 20% kaba kum veya bahçe toprağı ile zenginleştirilmiş, iyi drenajlı kaktüs karışımı.

For best results, use a specially formulated, well-draining cactus and succulent soil mix.

Safety

Although Echinopsis subinermis means "almost spineless," some plants may still have short, sparse spines. Handle with care.

Difficulty

Easy

This species is a relatively easy-care cactus, suitable even for beginners in cactus cultivation.

Native Habitat

Bolivia, northwestern Argentina.

The natural range of Echinopsis subinermis covers southern Bolivia and northwestern regions of Argentina [^14, ^15]. In these areas, they are typically found in high-altitude, semi-arid scrublands and rocky slopes. [^14]: Tropicos.org, Missouri Botanical Garden. "Echinopsis subinermis R.E.Fr.". Accessed: 2024-05-27. https://www.tropicos.org/name/50239614 [^15]: GBIF. "Echinopsis subinermis R.E.Fr.". Accessed: 2024-05-27. https://www.gbif.org/species/3084368

Frequently Asked Questions

Why is Echinopsis subinermis called "spineless" or "almost spineless"?
Echinopsis subinermis derives its name from the Latin word "subinermis," meaning "almost spineless." Unlike most cactus species, this particular species does not have prominent and sharp spines, or it possesses very short, sparse ones. This characteristic forms the origin of its name and gives it a smooth appearance [^9, ^10]. [^9]: R.E.Fr. "Echinopsis subinermis". The International Plant Names Index. Accessed: 2024-05-27. https://www.ipni.org/n/77114670-1 [^10]: Anderson, Edward F. "The Cactus Family." Timber Press, 2001. ISBN: 978-0881924985.
How often does Echinopsis subinermis bloom, and how long do its flowers last?
Echinopsis subinermis typically blooms during late spring and summer. Its flowers are large, funnel-shaped, and bright yellow. They usually open at night and last for only one day. However, with proper care and conditions, the plant can produce many successive blooms throughout the growing season [^10]. [^10]: Anderson, Edward F. "The Cactus Family." Timber Press, 2001. ISBN: 978-0881924985.
Is this cactus species safe for pets?
In general, cacti like Echinopsis subinermis are not considered toxic and do not pose a serious threat to pets. However, the short and sparse spines that some plants might have can prick curious pets' mouths or paws. Therefore, it is best to keep the plant out of reach of pets to prevent potential injuries [^16]. [^16]: ASPCA. "Cactus (Cactaceae)". Accessed: 2024-05-27. https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/cactus
How do I protect Echinopsis subinermis from cold?
Echinopsis subinermis is sensitive to cold and frost. In regions where temperatures are expected to drop below 5°C (41°F) during winter, it is important to bring your plant indoors or cover it with a frost cloth to protect it from freezing temperatures. Allowing it to rest in a dry and cool environment during winter is beneficial for the plant's health [^12]. [^12]: Tekşam, S. (2018). *Kaktüs ve Sukulent Bakımı*. Atlas Yayınevi.
Why is my cactus stretching and becoming weak (etiolation)?
Your cactus stretching and becoming weak (etiolation) is usually caused by insufficient light. Cacti like Echinopsis subinermis are exposed to abundant sun in their natural habitats. If your plant is not receiving enough light, it will grow abnormally long, thin, and pale in an attempt to reach more light. To prevent this, move your plant to a brighter location or use a grow light [^13]. [^13]: Gordon, D. (2019). *The Essential Guide to Cacti & Succulents*. Kyle Books.