Does anyone know the real name of a lily called a suprise lily?

we HAVE A SUPRISE LILY GROWING THEY CALL IT THAT BECAUSE SOMETIMES IT COMES UP THEN IT DOESN%26#039;T. WHAT IS THERE REAL NAME.

Does anyone know the real name of a lily called a suprise lily?
Here is some information...





All names: Surprise Lily, Magic Lily, Resurrection Lily, Naked Lady Lycoris squamigera





Family: Amaryllidaceae (am-uh-ril-id-AY-see-ay)


Genus: Lycoris (LY-kor-iss)


Species: squamigera (skwam-EE-ger-uh)





Height:


12-18 in. (30-45 cm)








Spacing:


3-6 in. (7-15 cm)








Hardiness:


USDA Zone 5a: to -28.8 °C (-20 °F)


USDA Zone 5b: to -26.1 °C (-15 °F)


USDA Zone 6a: to -23.3 °C (-10 °F)


USDA Zone 6b: to -20.5 °C (-5 °F)


USDA Zone 7a: to -17.7 °C (0 °F)


USDA Zone 7b: to -14.9 °C (5 °F)


USDA Zone 8a: to -12.2 °C (10 °F)


USDA Zone 8b: to -9.4 °C (15 °F)


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:


Full Sun





Bloom Time:


Mid Summer


Late Summer/Early Fall








Foliage:


Herbaceous


Smooth-Textured








Other details:


Average Water Needs; Water regularly; do not overwater








Soil pH requirements:


5.6 to 6.0 (acidic)


6.1 to 6.5 (mildly acidic)


6.6 to 7.5 (neutral)


7.6 to 7.8 (mildly alkaline)


7.9 to 8.5 (alkaline)








Propagation Methods:


By dividing rhizomes, tubers, corms or bulbs (including offsets)



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