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Echinopsis (Echinopsis subdenudata)
Family: Cactaceae (kak-TAY-see-ee) (Info) Genus: Echinopsis (ek-in-OP-sis) (Info) Species: subdenudata (sub-dee-noo-DAY-ta) (Info) Category: Cactus and Succulents Height: under 6 in. (15 cm) 6-12 in. (15-30 cm) 12-18 in. (30-45 cm) Spacing: 9-12 in. (22-30 cm) 12-15 in. (30-38 cm) 15-18 in. (38-45 cm) Hardiness: USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F) Sun Exposure: Sun to Partial Shade Light Shade Danger: Plant has spines or sharp edges; use extreme caution when handling Bloom Color: Pale Pink White/Near White Bloom Time: Mid Spring Late Spring/Early Summer Late Summer/Early Fall Foliage: Succulent Other details: Drought-tolerant; suitable for xeriscaping Average Water Needs; Water regularly; do not overwater Suitable for growing in containers Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) Patent Information: Non-patented Propagation Methods: From woody stem cuttings Allow cut surface to callous over before planting From seed; direct sow after last frost Seed Collecting: Allow unblemished fruit to ripen; clean and dry seeds Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds Properly cleaned, seed can be successfully stored
Yes is a cactus I have a pic where you will see the complete plant. It was a sunny day that gave it that color.
That's close but I don't think so. The color of this is more light purple than O. basilaris and the sharp pointed shape of the petals don't quite match.
MinervaMar, do you have any more photos of this to help with ID?
Though I can't see any of the plant, I believe this is the flower from a cactus. Perhaps Hylocereus or some type of nightblooming cactus.
http://en.wikipedia.org/wiki/Hylocereus