Flora of the Hawaiian Islands
Dicotyledon Literature for Hylocereus undatus
Wagner et al., 1990, 1999.
   Cactaceae -- The Cactus Family Bibliography
      Hylocereus undatus

Common name(s): night-blooming cereus, paniniokapunahou, papipi pua
General Information
DistributionNative to Central America, but extensively cultivated throughout the New and Old World tropics and sometimes naturalized.In the Hawaiian Islands, naturalized on Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

Sprawling terrestrial or epiphytic vines; stems 3-winged, the wings 2-3 cm wide, thin, crenate with calloused margins; areoles with 1-4 conical spines 1-3 mm long.

Flowers nocturnal, 25-30 cm long, 15-25 cm in diameter; sepaloid perianth parts greenish white, linear to linear-lanceolate, 10-15 cm long, 1-1.5 cm wide, inner perianth parts white, oblanceolate, 10-15 cm long, ca. 2.5 cm wide; staminal filaments cream-colored; style cream-colored, 17.5-20 cm long; stigma lobes up to 24, cream-colored.
Berries red, fleshy, splitting, oblong, 5-12.5 cm long, 4-10 cm in diameter.
2n = 22